United States

Department

of Agriculture

Forest Service

Rocky Mountain

Research Station

General Technical

Report RMRS-GTR-90

March 2002

The Nature of Flow and

Sediment Movement in

Little Granite Creek Near

Bondurant, Wyoming

Sandra E. Ryan

William W. Emmett
Ryan, Sandra E.; Emmett, William W. 2002. The nature of flow and sediment movement in Little

Granite Creek near Bondurant, Wyoming. Gen. Tech. Rep. RMRS-GTR-90. Ogden, UT: U.S.

Department of Agriculture, Forest Service, Rocky Mountain Research Station. 48 p.

Sediment and flow measurements were made during the course of 13 runoff seasons between

1982 and 1997 on a gravel-bed stream near Bondurant, Wyoming. The data for Little Granite Creek,

compiled through the efforts of the U.S. Geological Survey and USDA Forest Service, is one of the

most comprehensive databases on transport processes for an individual site available as of this

writing. Bedload, moved by flows ranging from 0.05 times to nearly twice the bankfull discharge, was

measured with an original Helley-Smith bedload sampler while wading, while suspended from a

bridge, or from a temporary sampling platform. Samples of suspended load were collected using

depth-integrating samplers. Laboratory analyses were conducted in accordance with standard U.S.

Geological Survey methods. Hydraulic data were taken from summaries of discharge measurements

maintained by the U.S. Geological Survey and by supplemental measurements made by Forest

Service personnel in 1997. All data on rates of bedload transport, particle-size distribution of

individual samples, suspended sediment load, measurements of hydraulic geometry, and channel

surveys are presented in tables and graphs.

Keywords: gravel-bed channels, bedload transport, suspended sediment, hydraulic geometry

Acknowledgments ________________________________

Many members of the USGS Idaho District and USGS National Research Program participated

in the collection of data between 1982 and 1993. Special thanks are due to Jake Jacobson of the

Idaho Falls subdistrict field office of the USGS. Bill Wade and Kevin Bayer (USFS) assisted in

collecting bedload samples and channel surveys in 1997. Mark Dixon (USFS) produced maps from

field data and generated results from the HEC-RAS analysis. Laurie Porth (USFS) provided

statistical guidance. Funding for manuscript preparation and field work in 1997 was provided by the

Stream Systems Technology Center of the USFS Rocky Mountain Research Station. Earlier

versions of this report were reviewed by Rudy King, Luna Leopold, Laurie Porth, John Potyondy, Wes

Smith, and Chuck Troendle.

Abstract _________________________________________

Cover photograph by S.E. Ryan taken June 1997.

Authors _________________________________________

Sandra E. Ryan, Research Hydrologist, USDA Forest Service, Forestry Sciences Laboratory,

222 S. 22nd Street, Laramie, WY 82070.

William W. Emmett, Consulting Hydrologist, 5960 S. Wolff Court, Littleton, CO 80123-6734.
You may order additional copies of this publication by sending your

mailing information in label form through one of the following media.

Please specify the publication title and number.

Telephone (970) 498-1392

FAX (970) 498-1396

E-mail rschneider@fs.fed.us

Web site http://www.fs.fed.us/rm

Mailing Address Publications Distribution

Rocky Mountain Research Station

240 West Prospect Road

Fort Collins, CO 80526

The use of trade or firm names in this publication is for reader information and does not

imply endorsement by the U.S. Department of Agriculture of any product or service
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 1

Introduction ___________________

Measurements of bedload transport provide invaluable information on the nature of flow and sedimentation processes in stream systems. This information

may be used to test models and quantify instream flow

requirements, as well as provide a general understanding of how flow and sediment interact in creating and maintaining channel form. Measuring rates

of bedload transport in coarse-grained channels can

be particularly difficult because flows necessary for

transporting larger particles are typically fast, turbid, and turbulent, making it difficult to directly

measure or observe particle motion. Bedload movement is usually sampled using a hand-held or a

suspended version of one of several types of pressuredifference bedload samplers (for example, Childers

1999; Emmett 1980; Hubbell and others 1985; Ryan

and Porth 1999; Zhian and Gangyan 1992). Because

such measurements are time and labor intensive and,

therefore, expensive, relatively few are usually obtained. Yet, numerous samples are needed to derive a

suitable measure of mean transport rates in light of

the exceptionally high variability associated with bedload movement (Edwards and Glysson 1998; Emmett

1980; Troendle and others 1996). Because of these

difficulties and limitations, relatively few databases on

bedload transport have been collected over long periods

(10 or more years) and over a range of discharges from

low flow to greater than bankfull. Nonetheless, databases of this nature are essential for understanding

the behavior of bedload transport, defining transport

rates of different grain sizes, and testing theoretical

transport relationships (Wohl 2000).

Through the combined efforts of personnel from the

U.S. Geological Survey (USGS) and the USDA Forest

Service (USFS), a relatively long-term database of

bedload and suspended sediment measurements has

been compiled for a 4th-order channel (based on

1:24,000 topographic maps) in western Wyoming. The

sampling program began in 1982 as part of environmental monitoring in conjunction with planned exploration and extraction of fossil fuels in the upper basin

of Little Granite Creek. Though the exploratory effort

The Nature of Flow and Sediment

Movement in Little Granite Creek

Near Bondurant, Wyoming

Sandra E. Ryan

William W. Emmett

was eventually abandoned, sediment monitoring was

continued by the USGS through 1993. The database

was expanded when additional bedload samples were

collected by the USFS during high flow in 1997. This

paper reports on more than 450 measurements of

sediment transport (bedload and suspended sediment)

at flows ranging from about 0.05 bankfull (approximately 10 cubic feet per second [cfs]) to nearly twice

the bankfull discharge (400 cfs).

Objectives ____________________

The primary objective of this paper is to characterize

the morphology and hydrology of Little Granite Creek

and the nature of bedload and suspended material

transported in this gravel-bed channel. To facilitate

further analysis, all data on flow, sediment, and grain

size measurements are provided in appendices and

graphs; planimetric maps and cross-sections provide

details on the configuration of the channel.

Site Description ________________

Little Granite Creek, an upland contributor to the

Snake River system, drains 21.1 square miles of the

Gros Ventre range near Bondurant, Wyoming, south

of Jackson, Wyoming. The geology underlying the

basin is varied but is composed primarily of sedimentary rocks of Cretaceous and Tertiary age, including:

the Hoback formation (interbedded grayish sandstone

and claystone), the Sohare formation (gray and brown

sandstone), the Ankaren formation (red and maroon

slate and purple limestone), and the Gannett group

(red mudstone, sandstone, and conglomerate) (Love

and Christiansen 1985). The upper portion of the

basin was glaciated and is mantled by till and glacial

outwash, likely correlative of Bull Lake and Pinedale

aged deposits (as generalized in Leopold and Emmett

1997). Basin elevation ranges from 10,921 ft at an

unnamed high point on a ridge near Pinnacle Peak to

6,390 ft at the confluence of Little Granite and Granite

Creeks; the sampling site is located roughly 175 ft

upstream of the confluence (fig. 1).
2 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

Drainage

Basin

USGS Gage

Location and

Sediment Sampling

Cross-section US Highway191

Gate

to

Bondurant, WY ~11 miles

to

Jackson, WY

~25 miles

43 16 55 o’ ”

43 23 30 o

’ ”

43 16 53 o

’ ”

43 23 29 o

’ ”

43 16 36 o

’ ”

43 23 30 o

’ ”

43 20 12 o ’ ” 43 20 11 o ’ ”

110 30 19 o

’ ”

110 30 13 o

’ ”

110 26 06 o

’ ”

110 25 39 o

’ ”

110 34 28 o

’ ”

110 34 25 o

’ ”

110 34 26 o

’ ” 110 26 04 o’ ”

Pinnacle

Peak

10808

N

WYOMING

1 1 2 0 1 Mile

1 1 Kilo 5 0 meter

7453

7850

7242

7005

Boulder

Granite

Granite

Little

Creek

Creek

Creek

River

Hoback

Figure 1—Map of the watershed drained by Little Granite Creek. Medium solid line indicates primary

road access. Dashed line indicates location of Forest Service road (30505) leading to an old mining

camp, cattle grazing area, and trailhead.
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 3

The channel in the vicinity of the cross-section is

single thread with slight sinuosity and a moderately

steep slope (fig. 2); mean water surface slope at low

flow is about 0.020 ft per ft. Bed material at the surface

ranges primarily from gravel to small boulders, with a

small amount of sand-sized grains at the channel

margins and in small patches in the lee of larger

particles. Median grain size is in the coarse gravel to

small cobble range. The channel type may be described

as plane-bed (as defined by Montgomery and Buffington

1997), because no clear undulating pattern exists

and there are only a few, poorly defined cobble steps.

Banks are composed of sand, gravel, and cobbles overlain by fine sand and organic matter; they are largely

stable and densely vegetated primarily by willows

(Salex sp.) and lodgepole pine (Pinus contorta).

Upland uses include grazing for a few months in late

summer and dispersed recreation (camping, hiking,

horseback riding, and hunting); 74 percent of the

watershed has wilderness designation. Forest Service

road 30505 parallels the stream for about 1.5 miles in

the lower end of the watershed. Former land uses

include coal extraction and a mining camp above the

confluence with Boulder Creek (fig. 1). These former

and present uses are small in scale, and their influence

on sediment delivered to the channel is relatively

Figure 2—Downstream view of Little Granite Creek with location of discontinued

U.S. Geological Survey gaging station and bedload-sampling cross-section

indicated by light colored lines (photograph by W.W. Emmett, July 1994).

nominal. Primary sources of sediment are from mass

wasting, including active earthflows from unstable

hillslopes, slumping from undercut terraces and road

cuts, and scour from the channel bed and banks. The

area is administered by the USFS, Bridger-Teton

National Forest, Jackson Ranger District.

Runoff in Little Granite Creek is generated primarily by snowmelt, with peak flows occurring between

mid-May and mid-June (fig. 3). While thunderstorms

are common in the summer, they produce only minimal rises in the hydrograph. The timing of seasonal

high flow is slightly earlier than some nearby streams

due to the south-to-southwest facing aspect of the

upper basin. Mean annual temperature is 33.3 °F and

mean annual precipitation is 20.53 inches at a nearby

climate station in the vicinity of Bondurant (elevation

6,504 ft) (Western Regional Climate Center [WRCC],

National Climate Data Center [NCDC] Normals, 1961–

1990). Mean daily temperature in January is 9.4 °F

and mean daily temperature in July is 56.9 °F (fig. 4)

(WRCC, NCDC Normals, 1961–1990). Most of the

precipitation falls as snow between November and

March; the average annual snowfall measured at

Bondurant between 1948 and 1999 is 134 inches

(standard deviation is 48.9 inches) (WRCC, Monthly

Total Snowfall).

Sampling Cross-section

Site of USGS Gaging Station

13019438

▲
4 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

Mean Daily Discharge

Little Granite Creek

0

100

200

300

400

500

600

700

10/1 11/1 12/1 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1

Date

Discharge (cfs)

WY 1982

WY 1983

WY 1984

WY 1985

WY 1986

WY 1987

WY 1988

WY 1989

WY 1990

WY 1991

WY 1992

Average

Figure 3—Daily mean flows from USGS gage (13019438) on Little Granite Creek for water years 1982

through 1992. The black line represents the mean of values for a given day.

Figure 4—Climagraph showing mean monthly temperature and

precipitation from a climate station at Bondurant, WY, the closest

long-term station to the Little Granite Creek study site.

0

10

20

30

40

50

60

1

1.5

2

2.5

3

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Mean Temperature oF

Mean Precipitation (inches) Mean temperature °F

Mean precipitation (inches)
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 5

Methods ______________________

Discharge Measurements

A USGS gaging station, Little Granite Creek near

Bondurant (13019438), was established in 1982 and

discontinued in 1992. The discharge records for these

years are published in two annual USGS Reports,

Water Resources Data for Wyoming and Water Resources Data for Idaho for the years 1982 through

1992. Because the gage was located in the upper Snake

River, installation and measurements were done by

the Idaho District of the USGS and the data were

published in the Idaho Report. Since the station is

located in Wyoming, the Wyoming District of the

USGS also published the data to complete its report.

The gage house was removed in 1992, though the

staff plate installed with the station remains intact.

Discharge at the time the sediment samples were

collected was obtained from the stage-discharge

rating curves developed from USGS discharge measurements and by supplemental measurements made

in 1993 and 1997. All measurements of discharge

were taken in accordance with standard USGS practices (Buchanan and Somers 1969; Nolan and Shields

2000).

Bedload Measurements

Bedload samples were collected with an original

version of the Helley-Smith sampler (Helley and Smith

1971). The wall of the sampler is 1/4-inch thick, the

body has an expansion ratio of 3.22, and the orifice

through which bedload passes is 3 by 3 inches so the

upper limit to the catch is about 76 mm (very coarse

gravel). The sampler is fitted with a catch bag with

0.25-mm mesh. Samples were collected during 1982–

1993 with a hand-held version of the sampler while

wading at flows less than about 200 cfs. At higher

flows, samples were collected from the vehicle bridge

downstream of the cross-section using a weighted

sampler that was cable-suspended from a truck crane.

A temporary platform (Martinez and Ryan 2000)

was constructed in 1997 at the wading cross-section

and bedload was collected from this platform with the

hand-held sampler fitted with an 8-ft handle.

Samples were collected at about 20 equidistant

positions (or verticals) on the cross-section, about 1 ft

apart; each vertical was sampled for 30 or 60 seconds.

Generally, two traverses of the channel width were

made during each visit. A bedload sample is a composite of sediments collected at all verticals on a

traverse and, thus, represents a spatially and temporally averaged transport rate measured over a period

of time ranging from about 30 to 60 minutes. This

procedure is referred to as the Single Equal Width

Increment (SEWI) method (Edwards and Glysson

1999). Rates of bedload transport rates averaged over

the channel width are reported for each sample collected between 1982 and 1997, along with date, discharge, and percentage of total measured load (appendix, table 1). Bedload samples were ovendried and

sieved using standard sedimentological methods for

grain size analysis (Folk 1968). Full phi-interval sieves,

ranging from 0.25 to 64 mm, were used to separate

bedload samples into 10 grain-size classes. These

particle-size data are reported in table 2 (appendix) as

the weight of bedload retained on individual sieves

and in table 3 (appendix) as the percentage finer than

each sieve size. Computed percentiles or D-values are

reported in table 4 (appendix). The D-values were

determined by interpolating between values of phi on

either side of the D-value being sought. Data from

individual samples are then summarized by year in

tables 5, 6, and 7 (appendix).

Suspended Sediment Measurements

Samples of suspended sediment load were usually

collected during the same visit when bedload was

measured in years 1982–1993; no measurements of

suspended sediment were made in 1997. Suspended

sediment was collected just before or after the bedload

sample was obtained; for all practical purposes, the

measurements are considered concurrent. Samples

were collected at several points in the cross-section

with a DH-48, D-74, or DH-81 depth integrating sampler following the Equal Width Increment (EWI)

method described in Edwards and Glysson (1999).

These data are reported in table 1 (appendix) along

with bedload discharge and percentage of total measured load. Percentages of the suspended load in the

silt- and sand-size classes are reported for most suspended sediment samples. Laboratory analyses of

concentrations and percentages at the silt-sand break

(0.0625 mm) were conducted by the USGS in accordance with guidelines in Guy (1969). The results

provide an index to the amount of material moved in

suspension relative to that amount moved as bedload.

Hydraulic Geometry Measurements

Measurements of width, mean depth, and mean

velocity obtained while making discharge measurements were extracted from the “summary of discharge

measurements” maintained by the USGS and from

field notes kept by USFS personnel in 1997. Only those

measurements made at or near the cross-section

where transport was measured are included in the

analysis of hydraulic geometry. However, all measurements are reported in table 8 (appendix). Low

flow measurements at narrower than typical sections

and high flow measurements made from the narrow

bridge crossing near the confluence are identifiable by
6 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

width criteria and were not used in the analysis of

hydraulic geometry. Specifically, measurements were

not used when the value of the width departed visually

from the trend generated from known measurements

at the primary cross-section.

Channel Surveys

Planimetry of the channel and profiles of the floodplain, water surface, and streambed elevations were

surveyed in 1986 and 1994. A more complete survey of

the area was done in 1997 using an automatic level

and total station surveying equipment. Surfaces inundated during high flow (approximately 400 cfs) and at

flows near bankfull were marked with pin flags during

runoff and these points of high water were included in

the survey. Several cross-sections were measured over

a 300-ft reach of channel above and below the sampling cross-section. Maps were generated from the

survey using RiverCAD (Boss International 1997)

and the area of flow inundation for discharges with

return frequencies of 1.5, 5, 10, 25, and 50 years were

modeled using HEC-RAS (U.S. Army Corp of Engineers 1997) calibrated to our field observations.

Surface and Subsurface Grain Size

Sampling

The particle size distribution of bed materials in

Little Granite Creek was assessed using pebble counts

(Wolman 1954). One count was made in July 1994

using 300 particles in the vicinity of the former gage

house and the sampling cross-section. A second count

was made in July 1997 in the same area using 200

particles. A third pebble count, also using 200 particles, was made in August 2000.

During the third count, a “barrel sampler” was used

to collect surface and subsurface materials near the

sampling cross-section. Specifically, a barrel sampler

consists of a 55-gallon drum with the top, bottom, and

bottom rim removed. The barrel is driven into the bed

of the channel by hand and reduces the loss of fine

grains to the passing flow. All surface grains are

removed, leaving the subsurface exposed. Smaller

grains are taken from the surface first so that they

are not mistaken for part of the subsurface once the

larger particles are removed. The subsurface is excavated using a scoop and the sediment is transferred

into cotton duck bags to permit drainage while retaining the majority of smaller grains. Approximately

20 lbs of subsurface materials are collected per barrel

sample. This material is later dried and sieved for

grain size analysis, using methods described previously. The distribution of particle sizes for both surface and subsurface measures are reported in table 9

(appendix).

Results _______________________

Flow Frequency Calculations and the

Bankfull Discharge

Estimates of flow frequency were calculated using

Log Pearson III analysis (U.S. Interagency Advisory

Committee on Water Data 1982) on the annual maximum series for the period 1982–1992 (fig. 5). The

confidence bands on the estimates are relatively wide

due to uncertainty associated with a limited record of

flow (Linsley and others 1975). The calculated 1.5-

year return interval flow was 210 cfs, with 95 percent

confidence limits ranging from 133 to 302 cfs. The

area inundated by this level of flow is nearly identical

to the bankfull stage as pinned in the field and delineated on maps in 1997. To corroborate further, we

looked at the bankfull stage that was field-determined

using profiles from the 1994 survey and the corresponding staff gage elevation and rating curve. This

estimate of the bankfull discharge, 229 cfs, corresponds to the floodplain elevation at the gage location

(Emmett 1999). Note that there is less than 10 percent

difference between the estimates of the bankfull discharge, which represents less than 0.1 ft difference in

stage. Hence, we conclude that the 1.5-year flow using

Log Pearson III analysis approximates the level of

flow that just fills the channel as determined in the

field. The highest discharge at which bedload was

measured (400 cfs) has a calculated return frequency

of about 3.1 years (95 percent confidence limits between 1.8 and 7 years).

Hydraulic Geometry and Areal Extent of

Flow at Varying Discharge

The hydraulic geometry of Little Granite Creek,

defined as the relationships between channel width,

mean depth, and mean velocity over varying levels of

flow, were fit with power functions using least-squares

regression; the data and equations are presented on

the commonly used log-log scaled plot (fig. 6). At the

1.5-year return interval flow (210 cfs), channel width

at the sampling cross-section is about 32 ft, mean

depth is 1.4 ft, and mean velocity is 4.5 ft s–1 (fps). At

400 cfs, the channel width is about 37 ft, mean depth

is 1.7 ft, and mean velocity is 6.2 fps. There was no

sharp break in the fitted relationships that would

suggest a threshold at which flow reaches bankfull

and spills onto the floodplain. This is probably because

variations in channel width, as well as a narrow and

often incremental floodplain, make bankfull identification on plots of hydraulic geometry difficult.

The channel near the sampling section on Little

Granite Creek is confined within a relatively narrow

valley bottom, with a steep hillslope to the west of the
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 7

Figure 5—Flow frequency calculations using Log Pearson III distribution. Upper and lower lines are the

95 percent confidence bands on the estimates of streamflow (1982–1992).

channel and the remnants of glacial deposition to the

east (fig. 7). The floodplain is narrow and discontinuous, as observed on a series of cross-sectional plots

(fig. 8); there is a low terrace at the downstream end

of the area on the left side. Of the estimates of

bankfull flow described in the previous section, only

the surveyed line that was marked in the field using

pin flags is shown. Differences between this line and

the 1.5-year discharge determined using Log Pearson

III are on the order of the line width on the crosssectional plots. The “high water line” on the map is

the highest flow at which bedload was measured in

1997 and is slightly less than the 5-year flood line

from the HEC-RAS model (shown only on crosssection plots); at this level, flow covers about a 2–3 ft

portion of the floodplain occupied by willows, grasses,

and sedges (fig. 2). Estimates of the 10-, 25-, and 50-

year stages were generated using the HEC-RAS

model. The 50-year flood covers the small floodplain

but is largely contained within the constrained valley

bottom and terraces.

Water surface profiles, used in estimating area inundation, were generated using a one-dimensional

flow model calibrated to field observations (fig. 9).

Numbers on the mid-channel elevation line refer to

measured cross-sections, except point 0, which is an

arbitrarily selected cutoff above the vehicle bridge.

Elevations at points 3.4 and 3.8 were added to model

the flow adequately through a steeper segment of the

channel; they are based on elevations from the longitudinal profile surveyed in the field. Profiles indicate

the presence of a control on the flow downstream from

the sampling cross-section where there is an increase

in the slope accompanied by a contraction in the

channel width. Mean water surface slope through the

reach decreases from 0.020 at the 1.5-year flow to

0.018 at the 50-year flood, all in accord with fieldmapped slopes averaged at 0.019 by Emmett (1998).

Bed Material

The grain size distribution of the channel bed sampled

in 1994 varied considerably from that observed in

1997 and 2000 (fig. 10). The median particle size (D50)

from pebble counts made in 1994 was 55 mm, which

is in the very coarse gravel range; D84, the 84th

percentile on a percent finer than scale, was 140 mm

(large cobble). Pebble counts from 1997 depict a

1.5 year return interval flow

Annual maximum series (cfs)

Exceedance recurrence interval
8 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

w = 11.7Q0.19

R2 = 0.85

MSE = 0.002

p < 0.001

v = 0.33Q0.49

R2 = 0.94

MSE = 0.002

p < 0.001

d = 0.26Q0.31

R2 = 0.97

MSE = 0.003

p < 0.001

0.1

1

10

100

1 10 100 1000

Discharge (cfs)

Width (ft), depth (ft), velocity (fps)

Width

Mean Velocity

Mean Depth

Figure 6—Relationship between width, hydraulic mean depth, and mean velocity over varying ranges

of flow with 95 percent confidence bands (thin lines). Plots only include cases when flow was measured

at or near the cross-section where sediment was sampled.

substantially coarser bed with a D50 of 100 mm and a

D84 of 220 mm, both of which are well into the cobblesize range. Pebble counts made in 2000 were intermediate with a D50 of 89 mm and a D84 of 207 mm, both

within the cobble range. The biggest difference in the

sets of data is a near absence of sand and small gravel

in the 1997 count. While the differences could be

attributable to variation in operator technique, there

was a notable absence of small gravel on the channel

surface observed after the extended high runoff in

1997. Gravel was limited to small patches behind

cobble clusters or in narrow zones along channel

margins and in small pools. Speculatively, we surmise that the sustained high flows of 1997 preferentially transported the smaller sized particles and

this diminished their presence in the study reach.

The pebble count from August 2000 indicates the

presence of more gravel in the bed, though apparently not to the 1994 level.

As is typical for gravel-bed channels, the subsurface

of the bed of Little Granite Creek is considerably finer

than the surface. While the distribution of grain sizes
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 9

Figure 7—Planimetric map of study site and areal inundation of flows with varying recurrence intervals.

Channel near vehicle-bridge was not mapped in detail and so flow lines do not extend to this area.

Elevation is relative to arbitrary datum above confluence.
10 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

Figure 8—Plots of cross-sections surveyed at study site in Little Granite Creek. Cross-section numbers

also referenced on figures 7 and 9. View at each cross-section is downstream. Vertical exaggeration is 1:1.

Downstrea

m

6375

6380

6385

6390

6395

6400

6405

-40 -20 0 20 40 60

Ground Surface Cross-section 1

1.5 year 

400 cfs

5 year

10 year

25 year

50 year

Distance (ft)

Hillslope/

Road Fill

Floodplain

Terrace

6375

6380

6385

6390

6395

6400

6405

-40 -20 0 20 40 60

Cross-section 2

Distance (ft)

Hillslope/

Road Fill

Floodplain

Terrace

6375

6380

6385

6390

6395

6400

6405

-20 0 20 40 60

Cross-section 3

(at staff plate)

Distance (ft)

Hillslope/

Road Fill

Floodplain Floodplain

Terrace
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 11 Downstrea

m

6380

6385

6390

6395

6400

6405

6410

-20 0 20 40 60 80

Cross-section 4

(Sampling cross-section)

Distance (ft)

Hillslope

Bank

cutout

Terrace

6380

6385

6390

6395

6400

6405

6410

-20 0 20 40 60

Cross-section 5

Distance (ft)

Hillslope

Floodplain Floodplain

Hillslope

6380

6385

6390

6395

6400

6405

6410

-20 0 20 40 60

Cross-section 6

Distance (ft)

Hillslope

Floodplain Floodplain

Hillslope

Figure 8 (Con.)
12 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

Figure 9—Water surface profiles determined for flows with 1.5-, 5-, 10-, 25-, and 50-year return

frequencies. Mapped height of high water line is included for reference. Vertical exaggeration is 5 times.

Figure 10—Particle size distribution of channel surface and subsurface in vicinity of sampling

cross-section and former USGS gaging site. Distribution of the surface sampled using Wolman

(1954) pebble counts in 1994, 1997, and 2000; small arrows indicate the temporal sequence of

these observations. Classification of sand, gravel, cobble, and boulder based on Guy 1969.

6375

6380

6385

6390

6395

6400

6405

-5 45 95 145 195 245 295

Distance (ft)

Relative Elevation (ft)

Mid-channel Elevation (ft)

50-year, 1324 cfs

25-year, 1045 cfs

10-year, 731 cfs

5-year, 526 cfs

High Water Line, 400 cfs

1.5-year, 210 cfs

0 1

3 2 3.4

3.8 4 5

6

Cross-section at Gage

Sampling Cross-section

0

10

20

30

40

50

60

70

80

90

100

0.1 1 10 100 1000

Particle Size (mm)

Cumulative Percent Finer Than

Cumulative Subsurface

Surface 1994

Surface 1997

Surface 2000

Subsurface #1

Subsurface #2

Subsurface #3

Subsurface #4

Subsurface #5

Subsurface #6

SAND

GRAVEL 

COBBLE BOULDER

Very Fine

Large

Very Coarse

Small

Medium

Coarse

 Fine
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 13

on the surface is spatially variable, the distribution of

the subsurface is more consistent, as indicated by near

overlap of five of the six subsurface distributions

shown on figure 10. The D50 of all subsurface samples

(and standard deviations) is 17.4 mm (±3.9) and D84 is

42 mm (±9.6). The D50 of the surface, based on pebble

counts in 2000, was 89 mm; hence, the median grain

size of the surface is about five times larger than that

of the subsurface. This ratio typically has a value

between 1.5 to 3 in gravel-bed channels (Thorne and

Hey 1983). The relatively large ratio for Little Granite

Creek suggests that the bed is well armored. The

composite D50 of the subsurface is approximately equal

to the D10 of the surface.

Rates of Bedload Transport

Total Transport—Sediment rating curves, which

characterize the rate of transport relative to discharge, were fitted to the bedload dataset; an arithmetic plot is used to express the range and variability

of samples collected at higher discharges (fig. 11).

Several models, including linear, power, and piecewise regression, were applied to determine best fit. A

piecewise linear regression model fits one or more

linear functions to different ranges of data (Neter and

others 1989); the model applied to bedload data is

described in Ryan and others (submitted). Breakpoints

are values on the x-axis where a change in the slope

of the different linear relationships can be defined.

While the regression functions so determined may be

discontinuous, the model can be written in such a way

that the function is continuous at all points, including

the breakpoint. We assume that, given what is understood about the nature of bedload movement in natural channels, the function should be continuous. The

breakpoint may be used as an indicator of flows at

which a substantial change in the rate and nature of

coarse-grained transport occurs (Ryan and others,

submitted) and is useful for defining phases of transport (for example, Ashworth and Ferguson 1989;

Jackson and Beschta 1982; Ryan and Troendle 1996;

Warburton 1992).

Figure 11—Three fits (linear, power, and piecewise linear) to bedload transport

data on arithmetic scale. Bars represent the 95 percent confidence limits on the

estimate of the breakpoint; bar height is arbitrary.

0

50

100

150

200

0 100 200 300 400 500

Breakpoint

171 cfs

1.5 year 

return interval flow

210 cfs

Power

function

Piecewise

regression

Linear

Bedload transport rate (tons/day)
14 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

One of the common difficulties encountered when

fitting regression models to bedload data is the nonnormality and heterogeneous variance of model results. When this occurs, the standard errors of the

estimates for each of the parameters are suspect

(Ryan and others, submitted). Hence, a bootstrapping

procedure was used to obtain nonparametric estimates of the standard errors and confidence intervals

for the model parameters (Efron and Tibshirani 1993).

Bootstrapping assumes the sample data represents

the distribution of the population and involves

resampling from the original dataset with replacement, meaning a datapoint may be selected more than

once, in order to obtain a secondary dataset. The model

is then fit to this secondary dataset and the parameters from the bootstrap estimates are retained. This

procedure is repeated a large number of times; we used

1,000 iterations, generating 1,000 secondary datasets.

Standard errors can then be calculated as the standard deviation of the bootstrap estimates for each

parameter (Efron and Tibshirani 1993).

Of the three fits, the linear fit was the poorest, as

may be expected, explaining about 50 percent of the

variance (R2 = 0.49). The linear model, where Q is

discharge (in cfs) and Gb is the expected rate of

bedload transport (in tons per day) is:

Gb = –15.1 + 0.165Q [1]

The form of the power model is:

Gb = –0.219 + 8.89E–07Q3.05 [2]

The power and piecewise regression models gave

fits that were nearly identical at discharges less

than 400 cfs and both accounted for about 60 percent

of the variance. However, the power fit increases at

a much higher rate and so extrapolation from this

model will predict substantially higher rates of transport for flows greater than 400 cfs compared to the

piecewise regression. Bedload transported in Little

Granite Creek, as characterized by piecewise regression model, has the form:

Gb = –0.351 + 0.0117Q for Q ≤ 171 [3]

Gb = –46.6 + 0.282Q for Q > 171 [4]

The rate of bedload transport is relatively low until

about 171 cfs (81 percent of the 1.5-year discharge, 210

cfs); the 95 percent confidence limits on the estimate of

the breakpoint are 107 to 235 cfs (51 to 112 percent of

the 1.5-year discharge).

For flows less than the breakpoint, bedload can

never be <0, so when Gb→0:

Gb = –0.351 + 0.0117Q

0.351 = 0.0117Q

Q = 30.0

Hence, an approximation for first or incipient motion

would be around 30 cfs. The slope of the line for flows

less than the breakpoint was 0.0117, indicating that

increasing flow produces only a small commensurate

increase in sediment. As flow approaches bankfull, the

rate of bedload transport increases substantially; the

slope of the line above the breakpoint was 0.282,

representing a 25 times increase in the rate of change

in bedload with increasing discharge. Conceptually,

there could be a second breakpoint at higher discharges indicative of the “leveling off” of shear stress

(and hence, sediment movement) in the channel as

flow moves onto the floodplain (for example, Ferguson

1994). However, there was no apparent leveling of the

rate of transport at flows between 220 and 400 to

indicate the presence of a second breakpoint. This may

be because there are no data above 400 cfs, and the few

data that exist for the highest flows are so variable

that the model is unable to improve the error reduction

by adding a third segment.

Emmett (1999) describes a similar analysis for the

data at Little Granite Creek, using the term “explosion” to characterize the rapid increase in transport

rate. Using visual indicators for the flow, which produces the rapid rise in transport rates, Emmett suggested that the explosion occurs at about 220 cfs,

which is considerably greater than the estimate of

171 cfs from the piecewise regression procedure. The

visual cue can be seen in figure 11 using several

especially large rates of transport at about 220 cfs.

Yet, while there is a discrepancy between the explosion and breakpoint estimates, Emmett’s estimate of

220 cfs is within the confidence limits of the breakpoint estimate from the piecewise regression procedure. In short, both estimates indicate that a substantial increase in the amount of bedload in transport

begins at flows approaching bankfull, or about the

1.5-year discharge.

Transport by Size Fractions—Fractional transport rates, in tons per day (t/d), were determined from

the size-distribution data in table 2 (appendix). The

transport rates for several grain size classes are plotted against discharge in figure 12; a similar analysis

offractional transport rates appears in Emmett (1999).

The discharge at the breakpoint and its confidence

limits are indicated on this plot, separating fractional

transport rates by flows greater or less than the

breakpoint. The primary constituent of all bedload

samples was sand that ranged from 100 percent of the

total sample weight at the lowest flows to 20 percent

at high flows. The presence or predominance of sand in

bedload is typical for channels with very coarse beds

(Leopold 1992; Lisle 1995). Bedload measured at flows

less than the breakpoint (30–172 cfs) consisted primarily of sand (80 percent on average) and some small

gravel (20 percent on average); D50 for these samples
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 15

was in the 1–4 mm range. Samples from flows less

than 30 cfs (estimated incipient motion) were typically

too small to sieve, but were most likely 100 percent fine

sand, perhaps entering the sampler as suspended load

rather than bedload.

There was a general tendency for bedload samples

from Little Granite Creek to become coarser with increasing discharge; the D50 of samples measured at

flows greater than the breakpoint were in the 2–32 mm

range. Coarse gravel (>32 mm) was rarely trapped at

flows less than the breakpoint; only 2 percent of the

samples collected at lower flows contained coarse

material and these were from flows close to the

breakpoint. This indicates that coarse gravel movement over this range of flows is essentially negligible.

The source of sand and small gravel is likely from

relatively mobile patches on the channel surface. By

comparison, coarse gravel was common in samples

Figure 12—Fractional rates of transport measured over a wide range of

discharges. Lines indicate values of the breakpoint discharge and the 95 percent

confidence limits on the breakpoint estimate.

0

10

20

30

40

50

60

0 50 100 150 200 250 300 350 400 450

Discharge (cfs)

Transport rate (tons/day)

> 64 mm

32-64 mm

16-32 mm

8-16 mm

4-8 mm

< 4 mm

Breakpoint

171 cfs

95% 

confidence

limits
16 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

collected at flows greater than the breakpoint where

60 percent of the samples contained particles larger

than 32 mm and 90 percent of the samples contained

gravel larger than 16 mm. Because particles in this

range approach the limits of the Helley-Smith sampler (Emmett 1980), it is likely that they are

underrepresented in the samples. Nonetheless, the

persistence of coarse gravel in bedload samples provides good evidence that conditions suitable for

transporting gravel and larger grains have been

reached. This does not imply that the entire bed

surface is in motion, but rather that representatives

from a number of size classes are mobile at flows

greater than the breakpoint. Particles 32 mm in diameter represent the 35th percentile of the bed measured

Figure 13—Comparison between suspended

load and bedload measured at Little Granite

Creek over the period 1982 through 1997.

in 1994, the 8th percentile as measured in 1997, and

the 22nd percentile as measured in 2000.

Suspended Sediment

Streams draining unstable Tertiary and Cretaceous

sedimentary formations in the area are typically muddy

and turbid during high runoff, due to high concentrations of materials carried by the flows. Much

more material is moved in suspension than as bedload

at Little Granite Creek, though the differences are

temporally variable. General trends in discharge for

both suspended sediment load and bedload are shown

in figure 13. The data are plotted on a log-log scale so

that comparisons over the full range of flows are

0.001

0.01

0.1

1

10

100

1000

1 10 100 1000

Bedload

Suspended Sediment Load

Sediment Transport Rate (tons/day)

Discharge (cfs)

Gb = -0.219+8.89E-07Q3.05

Gs = 0.0127Q1.59
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 17

readily discerned. The function fit to the bedload data

is the same as presented previously (equation 2). The

trendline for suspended sediment load (Gs) uses a

power function with the form:

Gs = 0.0127Q1.59 [5]

For years that suspended sediment samples were

collected (1982–1993), total suspended load was about

15 times greater than total bedload (see also: Leopold

1994:206). At low to moderate discharges, suspended

loads are about 100 times greater than bedload. The

rate of bedload transport increases more rapidly with

discharge so that at flows approaching bankfull, the

measured rates of bedload transport are within an

order of magnitude of that carried in suspension.

Similar conclusions were drawn in Leopold (1994)

using the suspended and bedload data measured between 1982–1988; additional data collected since then

(Emmett 1998) support these earlier results.

Summary _____________________

Little Granite Creek is a relatively steep, coarsegrained channel draining a 21.1 square mile area of

the Gros Ventre range near Bondurant, Wyoming.

Runoff is produced largely by the melting of snow so

there is a strong seasonal component to the flow

regime. Bankfull flows, estimated using a number of

methods, have about a 1.5-year return frequency. At

higher discharges, flow moves out onto a small, discontinuous, densely vegetated floodplain. Flows with return frequencies as high as 50 years are confined to the

narrow valley bottom within 3–5 ft terraces.

Sediment transport was measured at flows ranging

from 0.05 times to almost 2 times the bankfull discharge, making the database from Little Granite Creek

one of the most comprehensive available. From a land

management perspective, knowledge of the range of

flows needed to move different sized particles in streams

will help in determining discharges required to maintain the form and function of the channel and aquatic

habitat. Rates of bedload transport in Little Granite

Creek are quite low at flows up to 80 percent of

bankfull and the bedload consists primarily of sand

and small gravel. A significant increase in the rate of

transport occurs and the bedload becomes substantially coarser as flow reaches bankfull and greater

discharges. The persistence of coarse gravel in the

bedload samples at these higher flows indicates that

conditions suitable for the transport of larger grains

have been reached. While coarse particles are moved

during high flows occurring most years in Little Granite Creek, overall, much more sediment is moved in

suspension than as bedload. At lower flows, the differences between bedload and suspended load are on the

order of one to two orders of magnitude. Rates of

bedload and suspended sediment transport tend to

converge at higher discharges because of the increase

in the rate at which material is moved as bedload.

All data collected by the authors on sediment, flow,

and hydraulic geometry are presented in the tables in

the appendices. The data are also available electronically by request from the first author.

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Appendix
20 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 Table 1—Sediment load data, Little Granite Creek, Wyoming, 1982–1993 and 1997. Suspended load Bedload (GT) Water Water Percentage Percentage Percentage Percentage Total Percent year Date discharge Temp. Conc. (GS) Discharge silt sand Traverse (GB) Discharge sand gravel D50 D84 load GB/GT cfs °C mg/l t/d # t/d - - - - mm- - - - t/d 82 12/16/1981 5.7 0.0 8 0.123 — — — — — — — — — — 82 01/11/1982 4.3 .0 3 .035 — — — — — — — — — — 82 02/10/1982 7.3 .0 18 .355 — — — — — — — — — — 82 03/18/1982 4.1 .5 3 .033 — — — — — — — — — — 82 04/14/1982 7.8 3.5 24 .505 — — — — — — — — — — 82 05/11/1982 78. 2.0 50 10.5 66 34 — — — — — — — — 82 05/27/1982 354. — 326 312. 60 40 1 9.18 44 56 3.24 36.5 321. 2.86 82 06/02/1982 204. — 85 46.8 58 42 1 1.44 39 61 3.41 18.4 48.2 2.99 82 06/09/1982 165. 3.0 59 26.3 60 40 1 .477 76 24 1.05 2.51 26.8 1.78 82 06/18/1982 290. — 278 218. 59 41 1 7.05 38 62 4.27 36.3 225. 3.13 82 06/24/1982 237. — 217 139. 61 39 1 22.5 17 83 12.6 30.3 162. 13.93 82 06/29/1982 215. — 156 90.6 53 47 1 14.2 14 86 13.3 34.4 105. 13.55 82 07/07/1982 96. — 43 11.1 38 62 1 .293 49 51 2.07 7.76 11.4 2.57 82 07/13/1982 78. 7.5 20 4.21 — — 1 .191 60 40 1.37 5.71 4.40 4.34 82 08/18/1982 19. 12.0 9 .462 47 53 — — — — — — — — 82 09/14/1982 14. 6.5 15 .567 56 44 — — — — — — — — 83 10/20/1982 9.3 .0 43 1.08 — — — — — — — — — — 83 11/17/1982 10. .0 12 .324 — — — — — — — — — — 83 12/16/1982 8.1 .5 6 .131 — — — — — — — — — — 83 01/18/1983 5.6 .0 11 .166 23 77 — — — — — — — — 83 02/16/1983 6.1 .0 18 .296 60 40 — — — — — — — — 83 03/17/1983 8.3 .0 8 .179 — — — — — — — — — — 83 04/13/1983 9.1 2.5 19 .467 54 46 — — — — — — — — 83 05/17/1983 35. 6.5 20 1.89 68 32 1 .450 48 52 2.65 19.2 2.34 19.23 83 05/25/1983 160. 7.5 386 167. 69 31 1 3.61 78 22 .60 3.78 171. 2.21 83 06/01/1983 259. 6.0 316 221. 61 39 1 30.9 14 86 7.40 17.2 252. 12.27 83 06/08/1983 220. — 132 78.4 63 37 1 3.65 47 53 2.31 16.5 82.1 4.45 83 06/18/1983 163. 6.5 54 23.8 63 37 1 1.31 50 50 1.99 5.38 25.1 5.22 83 06/22/1983 119. 8.5 33 10.6 63 37 1 1.38 43 57 2.52 9.07 12.0 11.52 83 06/28/1983 119. — 27 8.60 71 29 — — — — — — — — 83 06/29/1983 93. 13.5 30 7.53 — — 1 .273 32 68 9.12 18.6 7.80 3.50 83 07/06/1983 78. 10.0 23 4.84 — — 1 .272 48 52 2.23 8.79 5.11 5.32 83 07/13/1983 54. 7.0 15 2.19 — — 1 .135 58 42 1.57 4.20 2.33 5.81 83 08/24/1983 24. 6.5 29 1.88 — — — — — — — — — — 84 10/12/1983 18. 2.5 37 1.80 — — — — — — — — — — 84 11/14/1983 19. 1.0 56 2.87 — — — — — — — — — — 84 12/15/1983 14. .0 32 1.21 — — — — — — — — — — 84 01/26/1984 11. .0 21 .624 — — — — — — — — — — 84 02/14/1984 9.1 .0 17 .418 — — — — — — — — — — 84 03/14/1984 9.0 1.0 102 2.48 86 14 — — — — — — — — 84 04/18/1984 49. 2.0 290 38.4 93 7 1 .290 72 28 .86 2.95 38.7 .75 (con.)
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 21 84 05/10/1984 50. — 136 18.4 84 16 1 .685 79 21 1.13 2.22 19.1 3.59 84 05/17/1984 198. 6.0 422 226. 71 29 1 11.9 17 83 13.3 26.3 238. 5.00 84 05/22/1984 166. — 220 98.6 75 25 1 9.11 38 62 3.93 34.9 108. 8.46 84 05/30/1984 253. — 1040 710. 72 28 1 42.1 18 82 21.0 35.8 752. 5.60 84 06/07/1984 142. — 106 40.6 — — 1 2.49 29 71 5.60 16.5 43.1 5.78 84 06/13/1984 111. 6.0 73 21.9 — — 1 .278 48 52 2.16 7.46 22.2 1.25 84 06/21/1984 121. — 81 26.5 — — 1 1.74 37 63 3.35 8.87 28.2 6.16 84 06/28/1984 110. — 45 13.4 — — 1 1.28 40 60 2.67 8.01 14.7 8.72 84 07/06/1984 74. — 24 4.80 — — 1 .088 47 53 2.15 5.89 4.89 1.80 84 07/11/1984 51. — 9 1.24 — — 1 .035 43 57 3.66 8.37 1.28 2.75 84 07/18/1984 41. 7.0 8 .886 56 44 1 .017 76 23 .87 2.38 .903 1.88 84 08/15/1984 18. 8.5 29 1.41 79 21 — — — — — — — — 84 09/11/1984 12. 6.0 16 .518 — — — — — — — — — — 85 10/24/1984 9.6 — 102 2.64 53 47 — — — — — — — — 85 11/14/1984 8.2 — 97 2.15 77 23 — — — — — — — — 85 12/12/1984 6.9 — 71 1.32 86 14 — — — — — — — — 85 01/08/1985 7.6 — 46 .944 71 29 — — — — — — — — 85 02/13/1985 6.0 — 30 .486 68 32 — — — — — — — — 85 03/19/1985 7.3 — 161 3.17 94 6 — — — — — — — — 85 04/17/1985 79. — 314 67.0 80 20 — — — — — — — 85 05/08/1985 139. — 203 76.2 67 33 1 1.91 72 28 .76 5.32 78.1 2.45 85 2 7.57 38 62 3.52 37.0 83.8 9.04 85 05/15/1985 104. — 125 35.1 74 26 1 .156 69 31 .92 8.19 35.3 .44 85 2 1.62 27 73 4.51 9.21 36.7 4.41 85 05/25/1985 129. 3.0 108 37.6 65 35 1 1.14 72 28 1.05 4.17 38.7 2.94 85 2 2.00 57 43 1.56 10.5 39.6 5.05 85 05/30/1985 100. 3.0 96 25.9 64 36 1 .726 57 43 1.65 6.60 26.6 2.73 85 2 1.77 31 69 3.96 9.01 27.7 6.40 85 06/05/1985 68. 7.0 72 13.2 62 38 1 .243 45 55 2.27 6.24 13.4 1.81 85 2 .443 43 57 2.31 4.83 13.6 3.25 85 06/13/1985 56. — 65 9.83 75 25 1 1.09 27 73 3.89 8.73 10.9 9.98 85 2 .749 31 69 3.54 7.86 10.6 7.08 85 06/19/1985 44. 7.0 30 3.56 86 14 1 .144 62 38 1.55 3.04 3.70 3.89 85 2 .039 67 33 1.20 3.26 3.60 1.08 85 06/27/1985 29. 9.0 76 5.95 95 5 1 .010 73 27 .89 2.23 5.96 .17 85 2 .013 78 22 .84 2.15 5.96 .22 85 07/02/1985 25. 15.0 42 2.84 76 24 1 .017 58 42 1.52 2.43 2.86 .60 85 2 .019 100 0 .38 .61 2.86 .66 85 07/11/1985 24. — — — — — 1 .454 31 69 5.93 19.6 — — 85 2 .338 44 56 2.33 5.60 — — 85 07/17/1985 14. 9.5 80 3.02 93 7 1 .017 76 24 1.05 2.18 3.04 .56 85 08/21/1985 10. — 51 1.38 84 16 — — — — — — — — 85 09/16/1985 7.3 — 28 .552 75 25 — — — — — — — — (con.) Table 1 (Con.) Suspended load Bedload (GT) Water Water Percentage Percentage Percentage Percentage Total Percent year Date discharge Temp. Conc. (GS) Discharge silt sand Traverse (GB) Discharge sand gravel D50 D84 load GB/GT cfs °C mg/l t/d sand # t/d - - - - mm- - - - t/d
22 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 86 10/09/1985 6.1 5.0 91 1.50 71 29 — — — — — — — — 86 05/08/1986 81. — 112 24.5 74 26 1 .178 60 40 .88 5.74 24.7 .72 86 05/14/1986 71. 1.5 103 19.7 70 30 1 .328 36 64 2.98 7.18 20.0 1.64 86 2 .934 52 48 1.90 4.52 20.6 4.53 86 05/20/1986 130. — 151 53.0 67 33 1 1.85 65 35 .88 8.22 54.9 3.37 86 05/28/1986 298. — 801 644. 54 46 1 20.2 13 87 12.0 25.4 664. 3.04 86 2 44.6 8 92 28.7 39.4 688. 6.48 86 06/03/1986 403. — 870 947. 53 47 1 46.0 8 92 25.9 64.7 993. 4.63 86 2 11.0 27 73 5.05 17.6 958. 1.15 86 06/12/1986 250. — 128 86.4 67 33 1 .485 39 61 4.23 16.2 86.9 .56 86 2 1.61 16 84 11.7 19.0 88.0 1.83 86 06/18/1986 180. — 111 53.9 76 24 1 .735 67 33 1.08 5.43 54.6 1.35 86 2 .407 77 23 .83 3.09 54.3 .75 86 06/26/1986 104. — 80 22.5 84 16 1 .396 43 57 2.34 5.23 22.9 1.73 86 2 .494 26 74 3.92 8.72 23.0 2.15 86 07/02/1986 83. — 52 11.7 78 22 1 1.13 25 75 4.10 10.8 12.8 8.81 86 2 .336 55 45 1.72 8.26 12.0 2.79 86 07/10/1986 57. — 58 8.93 70 30 1 .084 58 42 1.59 7.46 9.01 .93 86 2 .061 41 59 3.05 8.85 8.99 .68 86 07/16/1986 46. — 43 5.34 70 30 1 .081 31 69 2.99 6.03 5.42 1.49 86 2 .12 36 64 2.63 4.55 5.46 2.20 87 11/20/1986 8.4 .0 86 1.95 60 40 — — — — — — — — 87 03/19/1987 8.4 .0 16 .363 58 42 — — — — — — — — 87 05/07/1987 84. 7.0 65 14.7 81 19 1 1.35 47 53 2.26 8.54 16.1 8.41 87 05/13/1987 62. 8.0 43 7.20 84 16 1 1.01 64 36 1.43 3.80 8.21 12.30 87 2 .391 49 51 2.09 8.66 7.59 5.15 87 05/22/1987 66. 5.0 81 14.4 84 16 1 1.53 26 74 4.13 9.36 15.9 9.60 87 2 .541 47 53 2.20 7.07 14.9 3.62 87 05/28/1987 106. 5.0 274 78.4 92 8 1 7.76 38 62 3.17 13.9 86.2 9.01 87 2 2.05 47 53 2.26 8.07 80.5 2.55 87 06/03/1987 74. 7.0 40 7.99 87 13 1 1.63 29 71 3.88 9.34 9.62 16.94 87 2 .096 69 31 1.38 3.28 8.09 1.19 87 07/15/1987 20. 8.0 91 4.91 52 48 1 — — — — — — — 87 09/17/1987 8.4 11.0 4 .091 33 67 1 — — — — — — — 88 11/24/1987 5.3 .0 89 1.27 71 29 1 — — — — — — — 88 03/17/1988 5.4 .0 5 .073 68 32 1 — — — — — — — 88 05/04/1988 47. 4.5 54 6.85 80 20 — — — — — — — — 88 05/12/1988 68. 5.0 81 14.9 73 27 1 .581 65 35 1.18 4.63 155. 3.75 88 2 .496 72 28 1.02 3.70 15.4 3.22 88 05/18/1988 156. 6.0 147 61.9 66 34 1 .998 71 29 .82 5.18 62.9 1.59 88 2 2.09 55 45 1.65 6.57 64.0 3.27 (con.) Table 1 (Con.) Suspended load Bedload (GT) Water Water Percentage Percentage Percentage Percentage Total Percent year Date discharge Temp. Conc. (GS) Discharge silt sand Traverse (GB) Discharge sand gravel D50 D84 load GB/GT cfs °C mg/l t/d # t/d - - - - mm- - - - t/d
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 23 88 05/27/1988 149. 10.0 53 21.3 70 30 1 1.03 37 63 4.18 18.1 22.3 4.61 88 2 1.02 78 22 .68 3.22 22.3 4.57 88 06/03/1988 75. 6.0 47 9.52 70 30 1 .93 22 78 9.07 17.4 10.5 8.90 88 2 1.20 16 84 5.98 12.7 10.7 11.19 88 06/10/1988 59. 6.0 21 3.35 75 25 1 .068 54 46 1.85 4.44 3.42 1.99 88 2 .117 54 46 1.74 4.37 3.47 3.37 88 06/15/1988 48. 11.0 27 3.50 64 36 1 .061 85 15 .68 1.92 3.56 1.71 88 2 .147 56 44 1.78 4.11 3.65 4.03 88 06/22/1988 41. — 10 1.11 67 33 1 .023 59 41 1.64 2.42 1.13 2.03 88 2 .063 66 34 1.32 2.33 1.17 5.37 88 09/15/1988 7.0 6.0 4 .076 76 24 — — — — — — — — 89 11/11/1988 3.5 .0 25 .236 69 31 1 — — — — — — — 89 05/05/1989 84. 3.0 58 13.2 80 20 1 .441 51 49 1.94 4.54 13.6 3.23 89 2 1.42 51 49 1.95 4.32 14.6 9.71 89 05/09/1989 173. 4.5 309 144. 63 37 1 5.03 51 49 1.91 32.1 149. 3.38 89 2 6.45 55 45 1.67 7.91 150. 4.29 89 05/18/1989 154. 6.5 68 28.3 72 28 1 9.67 13 87 12.1 38.3 38.0 25.50 89 2 2.19 43 57 2.64 8.40 30.5 7.18 89 05/25/1989 137. 3.0 42 15.5 71 29 1 6.42 27 73 3.99 12.2 21.9 29.30 89 2 1.37 100 0 — — 16.9 8.12 89 06/02/1989 119. — 57 18.3 88 12 1 .303 100 0 — — 18.6 1.63 89 2 .518 100 0 — — 18.8 2.75 89 06/07/1989 166. 8.0 82 36.8 78 22 1 4.51 36 64 3.47 13.1 41.3 10.90 89 2 1.31 56 44 1.55 17.2 38.1 3.44 89 06/15/1989 122. 5.5 35 11.5 75 25 1 .147 90 10 0.76 1.67 11.6 1.26 89 2 .587 54 46 1.72 18.6 12.1 4.86 89 06/21/1989 78. 6.5 25 5.27 74 26 1 .174 100 0 — — 5.44 3.20 89 2 .106 100 0 — — 5.38 1.97 89 06/29/1989 52. 11.0 11 1.54 60 40 1 .015 100 0 — — 1.56 .96 89 2 .009 100 0 — — 1.55 .58 89 07/05/1989 45. 11.0 7 .851 69 31 1 .012 100 0 — — 0.863 1.39 89 2 .011 100 0 — — 0.862 1.28 89 09/13/1989 9.5 9.0 4 .103 74 26 — — — — — — — — 90 04/27/1990 54. 2.5 17 2.48 78 22 1 .184 100 0 — — 2.66 6.91 90 2 .328 100 0 — — 2.81 11.68 90 05/03/1990 45. 4.5 32 3.89 91 9 1 .295 100 0 — — 4.19 7.05 90 05/10/1990 69. 7.5 46 8.57 77 23 1 .339 100 0 — — 8.91 3.81 90 2 .696 77 23 1.17 2.40 9.27 7.51 90 05/18/1990 55. 5.0 12 1.78 63 37 1 .032 100 0 — — 1.81 1.77 90 2 .076 100 0 — — 1.86 4.09 90 05/25/1990 72. 8.0 22 4.28 73 27 1 .322 100 0 — — 4.60 7.00 90 2 .128 100 0 — — 4.41 2.90 (con.) Table 1 (Con.) Suspended load Bedload (GT) Water Water Percentage Percentage Percentage Percentage Total Percent year Date discharge Temp. Conc. (GS) Discharge silt sand Traverse (GB) Discharge sand gravel D50 D84 load GB/GT cfs °C mg/l t/d # t/d - - - - mm- - - - t/d
24 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 90 05/31/1990 80. 7.5 28 6.05 69 31 1 .089 100 0 — — 6.14 1.45 90 2 .985 100 0 — — 7.04 14.00 90 06/05/1990 72. 6.0 27 5.25 71 29 1 .310 100 0 — — 5.56 5.58 90 2 .877 100 0 — — 6.13 14.31 90 06/14/1990 63. 10.0 21 3.57 68 32 1 .411 100 0 — — 3.98 10.32 90 2 .063 100 0 — — 3.63 1.73 90 06/20/1990 61. 12.0 20 3.29 66 34 1 .128 100 0 — — 3.42 3.74 90 2 .527 100 0 — — 3.82 13.82 90 06/28/1990 52. 15.5 11 1.54 61 39 1 .572 100 0 — — 2.11 27.08 90 2 .086 100 0 — — 1.63 5.29 90 07/05/1990 34. 9.0 6 .551 55 45 1 .024 100 0 — — 0.575 4.17 90 2 .143 100 0 — — 0.694 20.61 90 09/18/1990 6.9 21.0 8 .149 49 51 — — — — — — — — 91 05/29/1991 100. 3.0 102 27.5 83 17 1 .017 78 22 .74 2.45 27.5 .06 91 2 .088 66 34 1.03 3.62 27.6 .32 91 05/21/1991 94. 5.0 25.9 1 .075 43 57 3.37 9.18 26.0 .29 91 2 .026 93 7 .53 1.43 25.9 .10 91 05/21/1991 94. 6.5 25.9 1 .140 95 5 .51 1.22 26.0 .54 91 2 .104 97 3 .46 1.06 26.0 .40 91 06/01/1991 86. 6.0 106 24.6 80 20 1 .062 91 9 .63 1.52 24.7 .25 91 2 .083 71 29 .79 4.10 24.7 .34 91 06/01/1991 86. 9.0 24.6 1 .048 91 9 .54 1.48 24.6 .19 91 2 .091 80 20 .85 2.82 24.7 .37 91 06/01/1991 84. 10.0 24.0 1 .227 95 5 .55 1.31 24.2 .94 91 2 .107 82 18 .79 3.24 24.1 .44 91 06/03/1991 111. 6.0 163 48.9 78 22 1 .363 92 8 .57 1.41 49.3 .74 91 2 .895 72 28 1.12 3.49 49.8 1.80 91 06/03/1991 149. 8.0 65.6 1 .569 90 10 .58 1.55 66.2 .86 91 2 .668 84 16 .67 2.00 66.3 1.01 91 06/03/1991 140. 9.0 61.6 1 1.29 77 23 .71 4.85 62.9 2.05 91 2 1.01 77 23 .76 3.63 62.6 1.61 91 06/04/1991 183. 6.0 164 81.0 70 30 1 3.57 66 34 1.33 4.34 84.6 4.22 91 2 1.47 40 60 5.06 19.2 82.5 1.78 91 06/04/1991 190. 9.0 84.1 1 1.93 69 31 1.21 4.00 86.0 2.24 91 2 2.11 69 31 1.09 4.01 86.2 2.45 91 06/11/1991 143. 6.0 100 38.6 71 29 1 .444 84 16 .83 2.00 39.0 1.14 91 2 .375 75 25 .95 3.71 39.0 .96 91 06/11/1991 143. 10.0 38.6 1 .787 61 39 1.58 5.66 39.4 2.00 91 2 .330 84 16 .91 2.04 38.9 .85 91 06/11/1991 144. 11.5 38.9 1 .674 60 40 1.36 8.13 39.6 1.70 91 2 .295 80 20 .90 2.6 39.2 .75 91 06/11/1991 158. 12.0 42.7 1 .374 68 32 1.06 17.3 43.1 .87 91 2 .504 93 7 .64 1.43 43.2 1.17 (con.) Table 1 (Con.) Suspended load Bedload (GT) Water Water Percentage Percentage Percentage Percentage Total Percent year Date discharge Temp. Conc. (GS) Discharge silt sand Traverse (GB) Discharge sand gravel D50 D84 load GB/GT cfs °C mg/l t/d # t/d - - - - mm- - - - t/d
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 25 91 06/12/1991 150. 6.0 108 43.7 79 21 1 1.20 69 31 1.34 3.16 44.9 2.67 91 2 .617 69 31 1.28 4.11 44.3 1.39 91 06/12/1991 139. 8.5 40.5 1 1.23 28 72 12.1 19.7 41.7 2.95 91 2 .406 78 22 1.06 2.64 40.9 .99 91 06/12/1991 148. 11.0 43.2 1 .363 88 12 .77 1.76 43.6 .83 91 2 .589 73 27 1.13 3.14 43.8 1.35 91 06/12/1991 154. 12.0 44.9 1 .974 61 39 1.46 5.16 45.9 2.12 91 2 .389 87 13 .79 1.82 45.3 .86 91 06/12/1991 159. 12.5 46.4 1 .550 85 15 .80 1.93 47.0 1.17 91 2 .653 95 5 .67 1.38 47.1 1.39 91 06/12/1991 166. 11.5 48.4 1 .942 60 40 1.41 10.6 49.3 1.91 91 2 .487 89 11 .69 1.67 48.9 1.00 91 06/13/1991 156. 7.0 87 36.6 74 26 1 .257 83 17 .74 2.14 36.9 1.43 91 2 .676 75 25 1.04 3.24 37.3 1.81 91 06/13/1991 152. 9.0 35.7 1 .392 88 12 .77 1.72 36.1 1.09 91 2 .209 94 6 .60 1.37 35.9 .58 91 06/13/1991 146. 10.5 34.3 1 .475 84 16 .88 2.06 34.8 1.37 91 2 1.29 64 36 1.46 4.45 34.8 3.71 92 06/05/1992 26. 12.0 9 .632 70 30 1 .004 97 3 .68 1.28 .636 .63 92 2 .003 96 4 .41 .95 .635 .47 92 06/06/1992 26. 8.0 11 .772 74 26 1 .004 95 5 .65 1.31 .776 .53 92 2 .019 76 24 1.01 2.18 .791 2.40 92 06/07/1992 25. 10.0 13 .878 84 16 1 .035 87 13 .80 1.80 .913 3.83 92 2 .012 96 4 .68 1.33 .890 1.35 92 06/08/1992 25. 9.0 9 .608 71 29 1 .007 90 10 .53 1.51 .615 1.15 92 2 .004 100 0 .38 .97 .612 .65 93 05/26/1993 196. 8.0 85 45.0 75 25 1 3.59 32 68 7.71 19.7 48.6 7.39 93 2 4.57 36 64 4.69 17.6 49.6 9.21 93 05/26/1993 182. 8.0 98 48.2 74 26 1 9.33 21 79 8.96 37.2 57.5 16.23 93 2 5.42 32 68 6.20 35.0 53.6 10.11 93 05/27/1993 217. 5.0 156 91.4 75 25 1 2.15 82 18 .79 2.34 93.5 2.30 93 2 1.98 84 16 .75 1.98 93.4 2.12 93 05/27/1993 221. 7.0 162 96.7 67 33 1 2.76 69 31 1.25 4.19 99.5 2.77 93 2 1.96 74 26 .98 3.56 98.7 1.99 93 05/28/1993 216. 6.0 118 68.8 70 30 1 6.24 13 87 24.6 36.5 75.0 8.32 93 2 8.60 12 88 34.9 42.5 77.4 11.11 93 05/28/1993 238. 8.0 129 82.9 73 27 1 3.44 57 43 1.62 15.6 86.3 3.99 93 2 3.52 49 51 2.07 16.3 86.4 4.07 93 06/06/1993 155. 6.0 33 13.8 76 24 1 .175 63 37 1.44 2.37 14.0 1.25 93 2 .163 81 19 .82 2.17 14.0 1.16 93 06/07/1993 153. 5.0 25 10.3 78 22 1 .121 80 20 .52 2.10 10.4 1.16 93 2 2.33 52 48 1.93 4.26 12.6 18.49 (con.) Table 1 (Con.) Suspended load Bedload (GT) Water Water Percentage Percentage Percentage Percentage Total Percent year Date discharge Temp. Conc. (GS) Discharge silt sand Traverse (GB) Discharge sand gravel D50 D84 load GB/GT cfs °C mg/l t/d # t/d - - - - mm- - - - t/d
26 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 93 06/08/1993 137. 6.0 27 9.99 72 28 1 .127 89 11 .85 1.70 10.1 1.26 93 2 .098 86 14 .68 1.88 10.1 .97 93 06/08/1993 134. 6.0 25 9.05 78 22 1 .067 91 9 .82 1.62 9.12 .73 93 2 .135 84 16 .90 2.00 9.18 1.47 93 06/09/1993 133. 7.0 27 9.70 79 21 1 .060 90 10 .59 1.61 9.76 .61 93 2 .101 80 20 1.17 2.30 9.80 1.03 93 06/09/1993 125. 6.0 29 9.79 81 19 1 .043 100 0 .52 .91 9.83 .44 93 2 .109 75 25 1.21 2.20 9.90 1.10 97 05/20/1997 275. — — — — — 1 81.7 18 82 8.54 33.1 — — 97 282. 2 55.0 27 73 4.45 13.3 — — 97 05/21/1997 289. — — — — — 1 29.0 34 66 3.74 28.7 — — 97 289. 2 21.0 24 76 13.7 35.2 — — 97 05/21/1997 337. — — — — — 1 60.1 17 83 18.3 36.9 — — 97 355. 2 61.7 20 80 13.2 33.7 — — 97 05/22/1997 315. — — — — — 1 51.9 16 84 14.4 30.3 — — 97 289. 2 41.1 21 79 13.3 41.8 — — 97 05/22/1997 324. — — — — — 1 37.9 23 77 8.90 38.5 — — 97 328. 2 30.7 33 67 4.50 34.9 — — 97 05/28/1997 218. — — — — — 1 2.11 60 40 1.24 12.6 — — 97 219. 2 12.5 34 66 3.53 13.7 — — 97 05/29/1997 240. — — — — — 1 27.8 31 69 6.15 29.0 — — 97 245. 2 55.3 17 83 8.94 31.4 — — 97 05/29/1997 248. — — — — — 1 13.7 51 49 1.96 8.99 — — 97 252. 2 73.0 16 84 12.2 49.1 — — 97 05/30/1997 268. — — — — — 1 6.25 58 42 1.65 6.53 — — 97 261. 2 3.85 67 33 1.16 4.94 — — 97 05/30/1997 261. — — — — — 1 10.4 38 62 3.83 33.2 — — 97 265. 2 5.44 60 40 1.56 5.55 — — 97 05/30/1997 310. — — — — — 1 14.8 47 53 2.52 24.6 — — 97 316. 2 30.7 30 70 6.77 31.7 — — 97 05/31/1997 275. — — — — — 1 8.19 40 60 2.87 9.78 — — 97 275. 2 7.75 46 54 2.50 10.8 — — 97 05/31/1997 285. — — — — — 1 13.8 39 61 3.52 36.5 — — 97 289. 2 12.0 44 56 2.49 10.3 — — 97 05/31/1997 328. — — — — — 1 23.0 32 68 7.49 27.6 — — 97 337. 2 23.1 46 54 2.45 7.94 — — 97 06/01/1997 364. — — — — — 1 15.4 45 55 2.71 22.8 — — 97 364. 2 20.5 29 71 7.36 34.4 — — 97 06/01/1997 355. — — — — — 1 14.2 40 60 3.42 24.5 — — 97 355. 2 19.5 42 58 2.82 9.45 — — 97 06/01/1997 346. — — — — — 1 13.4 41 59 3.95 23.7 — — 97 350. 2 11.8 55 45 1.52 30.8 — — (con.) Table 1 (Con.) Suspended load Bedload (GT) Water Water Percentage Percentage Percentage Percentage Total Percent year Date discharge Temp. Conc. (GS) Discharge silt sand Traverse (GB) Discharge sand gravel D50 D84 load GB/GT cfs °C mg/l t/d # t/d - - - - mm- - - - t/d
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 27 97 06/04/1997 394. — — — — — 1 98.1 26 74 7.40 27.1 — — 97 400. 2 71.2 31 69 6.75 27.3 — — 97 06/05/1997 353. — — — — — 1 80.6 31 69 5.20 26.8 — — 97 350. 2 76.8 30 70 7.19 39.6 — — 97 06/05/1997 350. — — — — — 1 109. 29 71 8.45 31.6 — — 97 358. 2 80.2 35 65 7.47 28.7 — — 97 06/05/1997 389. — — — — — 1 96.1 39 61 3.84 32.8 — — 97 399. 2 107. 22 78 17.1 38.3 — — 97 06/05/1997 413. — — — — — 1 174. 24 76 18.4 53.2 — — 97 404. 2 94.6 47 53 2.44 20.1 — — 97 06/06/1997 350. — — — — — 1 56.9 53 47 1.85 10.2 — — 97 337. 2 47.8 50 50 2.06 21.4 — — 97 06/06/1997 328. — — — — — 1 35.3 57 43 1.49 19.0 — — 97 328. 2 82.7 37 63 4.73 24.2 — — 97 06/10/1997 252. — — — — — 1 45.5 27 73 10.9 34.3 — — 97 259. 2 35.9 35 65 5.18 37.3 — — 97 06/11/1997 217. — — — — — 1 60.5 17 83 8.68 20.4 — — 97 217. 2 32.4 28 72 7.75 31.8 — — 97 06/11/1997 217. — — — — — 1 50.5 31 69 5.56 19.0 — — 97 217. 2 57.3 19 81 10.5 28.3 — — 97 06/11/1997 212. — — — — — 1 37.3 43 57 2.73 13.0 — — 97 214. 2 73.8 27 73 4.15 15.7 — — 97 06/12/1997 201. — — — — — 1 6.56 65 35 1.43 4.28 — — 97 198. 2 14.0 42 58 2.84 14.0 — — 97 06/12/1997 194. — — — — — 1 9.36 43 57 2.90 15.6 — — 97 194. 2 7.24 39 61 3.72 32.9 — — 97 06/12/1997 201. — — — — — 1 7.45 40 60 13.7 39.9 — — 97 201. 2 13.4 39 61 3.19 14.7 — — 97 06/13/1997 180. — — — — — 1 5.05 51 49 1.96 11.2 — — 97 180. 2 5.90 40 60 3.55 13.7 — — 97 06/13/1997 174. — — — — — 1 3.45 50 50 2.05 18.0 — — 97 174. 2 5.91 41 59 3.33 18.0 — — Table 1 (Con.) Suspended load Bedload (GT) Water Water Percentage Percentage Percentage Percentage Total Percent year Date discharge Temp. Conc. (GS) Discharge silt sand Traverse (GB) Discharge sand gravel D50 D84 load GB/GT cfs °C mg/l t/d # t/d - - - - mm- - - - t/d
28 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

(con.)

Table 2—Bedload particle-size distribution, percent retained on sieve size, Little Granite Creek, Wyoming, 1982–1993 and 1997.

Bedload

Water Traverse Percent retained on sieve size (mm)

Date discharge number Discharge Pan 0.25 0.5 1 2 4 8 16 32 64

cfs t/d

05/27/1982 354 1 9.18 2.0 15.1 14.4 12.1 9.2 6.6 5.5 5.0 30.1 0.0

06/02/1982 204 1 1.44 1.5 9.7 12.0 15.6 14.6 12.1 3.3 31.2 .0 .0

06/09/1982 165 1 .477 2.7 20.3 24.7 28.5 18.2 5.6 .0 .0 .0 .0

06/18/1982 290 1 7.05 2.0 11.4 12.0 12.9 11.0 7.3 3.1 10.8 29.5 .0

06/24/1982 237 1 22.5 .7 4.0 4.7 7.5 9.8 11.1 18.8 29.2 14.2 .0

06/29/1982 215 1 14.2 .4 3.4 4.5 5.8 7.2 11.6 23.5 21.4 22.2 .0

07/07/1982 96 1 .293 2.5 15.2 15.9 15.6 15.9 19.7 11.6 3.6 .0 .0

07/13/1982 78 1 .191 6.3 17.4 18.2 17.8 14.0 17.4 8.9 .0 .0 .0

05/17/1983 35 1 .450 4.3 10.8 18.1 14.4 5.9 5.5 1.8 39.2 .0 .0

05/25/1983 160 1 3.61 10.2 34.0 21.8 12.3 6.3 6.2 6.6 2.6 .0 .0

06/01/1983 259 1 30.9 .4 2.3 3.9 7.8 9.4 10.6 19.2 24.0 22.4 .0

06/08/1983 220 1 3.65 1.4 15.3 15.4 14.9 14.4 13.8 6.6 18.2 .0 .0

06/18/1983 163 1 1.31 5.4 15.4 13.1 16.2 23.9 19.0 7.0 .0 .0 .0

06/22/1983 119 1 1.38 2.7 9.5 12.0 18.4 21.8 16.7 12.7 6.2 .0 .0

06/29/1983 93 1 .273 5.4 10.9 7.5 7.8 8.0 6.3 21.1 33.0 .0 .0

07/06/1983 78 1 .272 4.5 13.9 13.9 15.2 15.9 11.7 24.9 .0 .0 .0

07/13/1983 54 1 .135 5.0 13.4 17.4 21.9 22.4 19.9 .0 .0 .0 .0

04/18/1984 49 1 .290 11.7 24.7 17.3 18.5 18.5 6.6 2.7 .0 .0 .0

05/10/1984 50 1 .685 7.7 12.7 22.5 36.2 19.0 1.9 .0 .0 .0 .0

05/17/1984 198 1 11.9 1.5 4.8 5.2 5.7 6.5 9.1 23.7 34.3 9.2 .0

05/22/1984 166 1 9.11 4.0 12.7 10.3 11.0 12.3 9.5 11.5 4.6 24.1 .0

05/30/1984 253 1 42.1 2.5 6.3 5.0 4.1 2.8 2.7 11.5 37.9 27.2 .0

06/07/1984 142 1 2.49 3.2 8.2 8.1 9.3 12.7 17.5 22.6 18.4 .0 .0

06/13/1984 111 1 .278 4.3 13.4 14.6 15.5 19.1 18.7 14.4 .0 .0 .0

06/21/1984 121 1 1.74 4.5 10.3 9.7 12.6 17.4 19.4 26.1 .0 .0 .0

06/28/1984 110 1 1.28 3.6 7.1 10.5 18.4 24.7 19.8 11.6 4.3 .0 .0

07/06/1984 74 1 .088 4.6 9.0 13.5 20.3 24.1 19.5 9.0 .0 .0 .0

07/11/1984 51 1 .035 5.9 11.8 13.7 11.8 7.8 29.4 19.6 .0 .0 .0

07/18/1984 41 1 .017 15.5 19.2 19.2 23.1 19.2 3.8 .0 .0 .0 .0

05/08/1985 139 1 1.91 11.5 27.7 18.0 15.0 8.6 7.4 5.1 6.7 .0 .0

2 7.57 3.6 10.2 9.9 14.1 15.0 9.0 4.5 1.2 32.5 .0

05/15/1985 104 1 .156 12.1 22.4 17.8 16.8 7.5 7.5 .9 15.0 .0 .0

2 1.62 1.8 3.9 6.9 14.3 19.2 22.1 31.8 .0 .0 .0

05/25/1985 129 1 1.14 8.1 20.3 22.0 21.0 12.0 9.5 7.1 .0 .0 .0

2 2.00 7.2 15.8 14.5 19.5 15.6 9.7 4.4 13.3 .0 .0

05/30/1985 100 1 .726 3.3 10.1 18.3 25.6 19.5 9.7 13.5 .0 .0 .0

2 1.77 1.5 4.4 8.9 16.1 19.5 21.3 28.3 .0 .0 .0

06/05/1985 68 1 .243 3.1 10.1 13.9 18.3 24.0 20.5 10.1 .0 .0 .0

2 .443 1.5 5.2 12.1 24.4 31.4 22.6 2.8 .0 .0 .0

06/13/1985 56 1 1.09 1.0 3.4 7.0 15.8 23.7 25.0 24.1 .0 .0 .0

2 .749 1.2 4.2 8.7 16.3 23.8 30.5 12.8 2.5 .0 .0

06/19/1985 44 1 .144 1.4 8.6 20.6 31.1 31.1 7.2 .0 .0 .0 .0

2 .039 6.6 15.2 21.7 23.9 21.7 10.9 .0 .0 .0 .0

06/27/1985 29 1 .010 13.3 20.0 20.0 20.0 26.7 .0 .0 .0 .0 .0

2 .013 5.6 27.8 22.2 22.2 22.2 .0 .0 .0 .0 .0

07/02/1985 25 1 .017 3.9 19.2 15.4 19.2 42.3 .0 .0 .0 .0 .0

2 .019 37.9 20.7 41.4 .0 .0 .0 .0 .0 .0 .0

07/11/1985 24 1 .454 2.1 4.1 9.4 15.3 13.2 10.4 1.2 44.3 .0 .0

2 .338 2.7 8.1 12.9 20.4 26.1 23.1 6.7 .0 .0 .0

07/17/1985 14 1 .017 8.0 20.0 20.0 28.0 24.0 .0 .0 .0 .0 .0

05/08/1986 81 1 .178 15.5 25.1 11.5 7.4 16.3 14.1 10.1 .0 .0 .0

05/14/1986 71 1 .328 3.6 8.3 10.3 13.4 25.1 26.5 12.8 .0 .0 .0

2 .934 2.4 10.1 15.3 24.1 26.8 18.7 2.6 .0 .0 .0

05/20/1986 130 1 1.85 10.8 27.1 14.8 12.7 9.3 9.0 8.7 7.6 .0 .0

05/28/1986 298 1 20.2 1.7 3.2 3.0 4.6 7.0 14.3 28.0 29.4 8.8 .0

2 44.6 1.3 2.5 2.0 1.8 4.5 4.5 9.5 28.7 45.2 .0
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 29

06/03/1986 403 1 46.0 .9 2.7 2.1 2.5 2.8 3.9 11.8 34.1 22.5 16.7

2 11.0 3.2 6.0 6.9 11.3 16.3 18.6 18.0 17.1 2.6 .0

06/12/1986 250 1 .485 6.7 16.0 8.1 8.2 10.1 11.0 23.3 16.6 .0 .0

2 1.61 3.3 6.4 3.6 2.9 4.9 13.9 27.2 37.8 .0 .0

06/18/1986 180 1 .735 1.0 22.5 24.2 19.5 13.7 6.8 12.3 .0 .0 .0

2 .407 1.5 28.5 27.9 18.7 11.2 10.1 2.1 .0 .0 .0

06/26/1986 104 1 .396 .6 7.1 13.2 22.0 30.0 21.8 5.3 .0 .0 .0

2 .494 .5 5.9 7.5 11.9 25.0 34.0 15.2 .0 .0 .0

07/02/1986 83 1 1.13 .7 2.6 7.0 14.9 23.8 25.2 18.5 7.3 .0 .0

2 .336 2.1 8.2 21.1 23.9 16.3 10.0 18.4 .0 .0 .0

07/10/1986 57 1 .084 1.6 12.2 21.1 22.8 12.2 15.5 14.6 .0 .0 .0

2 .061 2.3 9.0 13.5 15.7 15.7 18.0 25.8 .0 .0 .0

07/16/1986 46 1 .081 1.5 5.2 6.7 17.2 33.6 28.3 7.5 .0 .0 .0

2 .120 1.5 7.1 10.6 17.2 33.8 29.8 .0 .0 .0 .0

05/07/1987 84 1 1.35 5.7 8.8 13.2 19.4 16.4 14.9 21.6 .0 .0 .0

05/13/1987 62 1 1.01 5.1 9.8 19.9 29.6 20.9 12.5 2.2 .0 .0 .0

2 .391 3.9 11.8 16.7 16.6 15.0 12.8 23.2 .0 .0 .0

05/22/1987 66 1 1.53 2.8 3.2 6.5 13.9 22.1 30.1 17.0 4.4 .0 .0

2 .541 2.4 9.6 15.0 19.6 21.9 18.2 13.3 .0 .0 .0

05/28/1987 106 1 7.76 2.0 5.0 12.3 18.7 18.2 17.9 15.9 10.0 .0 .0

2 2.05 4.3 8.6 14.0 19.8 18.7 18.1 16.5 .0 .0 .0

06/03/1987 74 1 1.63 2.4 4.4 7.5 14.9 21.8 26.4 19.4 3.2 .0 .0

2 .096 4.2 9.7 19.4 35.8 19.4 7.9 3.6 .0 .0 .0

05/12/1988 68 1 .581 9.7 17.5 18.1 19.6 14.2 16.5 4.4 .0 .0 .0

2 .496 9.9 20.1 19.2 22.5 13.7 7.6 7.0 .0 .0 .0

05/18/1988 156 1 .998 11.9 25.4 17.9 16.2 9.1 8.7 10.8 .0 .0 .0

2 2.09 6.0 14.6 16.2 18.3 16.9 15.8 8.4 3.8 .0 .0

05/27/1988 149 1 1.03 4.2 8.6 10.4 13.4 12.8 9.2 12.8 28.6 .0 .0

2 1.02 11.2 29.8 20.0 16.7 8.9 6.1 3.2 4.1 .0 .0

06/03/1988 75 1 .930 2.0 4.8 6.2 8.5 9.2 12.9 33.0 23.4 .0 .0

2 1.20 1.3 2.6 3.6 8.3 16.0 31.6 27.5 9.1 .0 .0

06/10/1988 59 1 .068 4.0 7.1 14.1 28.3 20.2 26.3 .0 .0 .0 .0

2 .117 3.6 11.2 18.3 21.3 21.3 24.3 .0 .0 .0 .0

06/15/1988 48 1 .061 7.6 29.0 30.1 18.3 7.5 7.5 .0 .0 .0 .0

2 .147 1.9 5.6 16.4 31.9 26.3 17.9 .0 .0 .0 .0

06/22/1988 41 1 .023 2.9 11.8 14.7 29.4 41.2 .0 .0 .0 .0 .0

2 .063 5.1 13.3 20.4 27.5 33.7 .0 .0 .0 .0 .0

05/05/1989 84 1 .441 2.0 8.9 13.1 27.4 25.7 21.3 1.6 .0 .0 .0

2 1.42 3.7 5.6 13.2 28.6 29.7 17.1 2.1 .0 .0 .0

05/09/1989 173 1 5.03 3.0 20.2 16.2 11.4 5.3 3.6 3.1 21.1 16.1 .0

2 6.45 2.7 17.0 17.4 17.5 16.3 13.4 9.8 5.9 .0 .0

05/18/1989 154 1 9.67 .6 .9 3.0 8.9 14.6 14.7 12.2 6.3 38.8 .0

2 2.19 4.0 9.1 11.7 18.0 18.0 22.0 12.8 4.4 .0 .0

05/25/1989 137 1 6.42 .8 2.3 7.1 17.2 22.7 21.3 18.5 10.1 .0 .0

2 — — — — — — — — — ——

06/02/1989 119 1 — — — — — — — — — ——

2 — — — — — — — — — ——

06/07/1989 166 1 4.51 2.5 6.8 10.5 16.0 17.9 17.5 16.8 12.0 .0 .0

2 1.31 5.6 16.6 18.3 15.1 11.3 5.0 5.5 22.6 .0 .0

06/15/1989 122 1 .147 7.4 26.1 27.6 28.4 10.5 .0 .0 .0 .0 .0

2 .587 5.8 15.3 15.8 16.8 8.4 2.9 1.9 33.1 .0 .0

06/21/1989 78 1 — — — — — — — — — ——

2 — — — — — — — — — ——

06/29/1989 52 1 — — — — — — — — — ——

2 — — — — — — — — — ——

07/05/1989 45 1 — — — — — — — — — ——

2 — — — — — — — — — ——

(con.)

Table 2 (Con.)

Bedload

Water Traverse Percent retained on sieve size (mm)

Date discharge number Discharge Pan 0.25 0.5 1 2 4 8 16 32 64

cfs t/d
30 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

04/27/1990 54 1 — — — — — — — — — ——

2 — — — — — — — — — ——

05/03/1990 45 1 — — — — — — — — — ——

05/10/1990 69 1 .696 4.4 13.2 23.7 35.9 18.5 4.3 .0 .0 .0 .0

2 — — — — — — — — — ——

05/18/1990 55 1 — — — — — — — — — ——

2 — — — — — — — — — ——

05/25/1990 72 1 — — — — — — — — — ——

2 — — — — — — — — — ——

05/31/1990 80 1 — — — — — — — — — ——

2 — — — — — — — — — ——

06/05/1990 72 1 — — — — — — — — — ——

2 — — — — — — — — — ——

06/14/1990 63 1 — — — — — — — — — ——

2 — — — — — — — — — ——

06/20/1990 61 1 — — — — — — — — — ——

2 — — — — — — — — — ——

06/28/1990 52 1 — — — — — — — — — ——

2 — — — — — — — — — ——

07/05/1990 34 1 — — — — — — — — — ——

2 — — — — — — — — — ——

05/29/1991 100 1 .017 12.5 25.0 21.9 18.8 15.6 6.2 .0 .0 .0 .0

2 .088 7.6 23.5 18.2 16.7 20.4 13.6 .0 .0 .0 .0

05/29/1991 94 1 .075 5.5 11.0 9.2 17.4 9.2 16.5 31.2 .0 .0 .0

2 .026 13.8 34.5 20.7 24.1 6.9 .0 .0 .0 .0 .0

05/29/1991 94 1 .140 9.9 40.1 27.2 17.8 5.0 .0 .0 .0 .0 .0

2 .104 11.0 45.2 26.0 15.1 2.7 .0 .0 .0 .0 .0

06/01/1991 86 1 .062 6.5 34.8 26.1 23.9 6.5 2.2 .0 .0 .0 .0

2 .083 6.4 30.7 19.4 14.5 11.3 17.7 .0 .0 .0 .0

06/01/1991 86 1 .048 8.9 38.2 23.5 20.6 8.8 .0 .0 .0 .0 .0

2 .091 6.2 26.1 23.1 24.6 7.7 12.3 .0 .0 .0 .0

06/01/1991 84 1 .227 10.4 35.6 27.0 21.5 5.5 .0 .0 .0 .0 .0

2 .107 7.3 27.2 23.5 23.5 3.7 14.8 .0 .0 .0 .0

06/03/1991 111 1 .363 9.1 35.6 28.0 19.4 6.8 1.1 .0 .0 .0 .0

2 .895 5.3 20.6 19.8 26.1 14.7 8.2 5.3 .0 .0 .0

06/03/1991 149 1 .569 10.6 33.8 25.8 19.7 7.3 2.8 .0 .0 .0 .0

2 .668 8.1 32.3 22.8 20.9 9.6 5.5 .8 .0 .0 .0

06/03/1991 140 1 1.29 9.0 29.4 22.7 16.2 5.9 3.2 3.8 9.8 .0 .0

2 1.01 8.4 28.9 21.2 18.8 7.8 4.6 3.5 6.8 .0 .0

06/04/1991 183 1 3.57 3.2 13.6 21.7 27.9 15.6 12.8 5.2 .0 .0 .0

2 1.47 4.3 14.2 11.5 10.2 6.6 9.4 4.7 39.1 .0 .0

06/04/1991 190 1 1.93 4.9 17.7 20.1 26.0 15.4 12.6 3.3 .0 .0 .0

2 2.11 5.9 22.8 18.4 21.9 15.0 14.2 1.8 .0 .0 .0

06/11/1991 143 1 .444 6.1 23.1 29.1 25.8 11.1 4.8 .0 .0 .0 .0

2 .357 6.7 23.0 23.8 21.2 10.4 11.5 3.4 .0 .0 .0

06/11/1991 143 1 .787 2.3 9.4 17.7 31.5 17.3 10.7 11.1 .0 .0 .0

2 .330 4.8 19.9 27.3 31.6 11.7 4.7 .0 .0 .0 .0

06/11/1991 144 1 .674 4.6 18.3 19.3 17.7 10.2 12.8 17.1 .0 .0 .0

2 .295 5.5 23.0 25.4 26.3 9.2 5.5 5.1 .0 .0 .0

06/11/1991 158 1 .374 5.4 19.9 23.1 19.1 6.5 3.3 .0 22.7 .0 .0

2 .504 8.3 30.6 30.3 23.6 6.9 .3 .0 .0 .0 .0

06/12/1991 150 1 1.20 3.1 11.7 20.9 33.6 20.2 8.5 2.0 .0 .0 .0

2 .617 4.3 14.3 20.6 30.0 14.1 13.5 3.2 .0 .0 .0

06/12/1991 139 1 1.23 1.9 6.6 9.6 10.1 5.9 9.7 10.4 45.8 .0 .0

2 .406 5.7 17.9 23.8 30.2 13.7 5.2 3.5 .0 .0 .0

06/12/1991 148 1 .363 7.9 24.6 28.0 27.3 7.6 4.6 .0 .0 .0 .0

2 .589 4.9 16.8 23.0 28.4 15.5 8.9 2.5 .0 .0 .0

06/12/1991 154 1 .974 3.5 13.4 20.2 23.8 16.3 15.3 7.5 .0 .0 .0

2 .389 7.3 23.6 29.5 26.4 9.4 3.8 .0 .0 .0 .0

(con.)

Table 2 (Con.)

Bedload

Water Traverse Percent retained on sieve size (mm)

Date discharge number Discharge Pan 0.25 0.5 1 2 4 8 16 32 64

cfs t/d
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 31

06/12/1991 159 1 .550 6.3 24.8 28.4 25.6 9.6 5.3 .0 .0 .0 .0

2 .653 8.4 28.1 31.6 26.6 4.9 .4 .0 .0 .0 .0

06/12/1991 166 1 .942 5.7 16.8 18.1 18.9 9.6 9.7 11.3 9.9 .0 .0

2 .487 8.5 27.9 29.3 22.9 8.8 2.6 .0 .0 .0 .0

06/13/1991 156 1 .257 7.6 26.6 27.7 21.2 8.7 8.2 .0 .0 .0 .0

2 .676 5.3 19.1 25.6 24.8 12.6 8.3 4.3 .0 .0 .0

06/13/1991 152 1 .392 7.4 24.9 29.1 27.0 8.8 2.8 .0 .0 .0 .0

2 .209 10.6 31.7 28.9 22.5 6.3 .0 .0 .0 .0 .0

06/13/1991 146 1 .475 6.5 21.1 27.5 28.4 11.2 5.3 .0 .0 .0 .0

2 1.29 3.1 11.6 18.4 31.1 18.2 9.2 8.4 .0 .0 .0

06/05/1992 26 1 .004 12.5 20.7 37.2 26.4 3.2 .0 .0 .0 .0 .0

2 .003 26.4 33.4 25.7 10.3 4.2 .0 .0 .0 .0 .0

06/06/1992 26 1 .004 12.8 23.3 35.3 24.0 4.6 .0 .0 .0 .0 .0

2 .019 4.6 16.8 28.1 26.6 23.9 .0 .0 .0 .0 .0

06/07/1992 25 1 .035 5.7 20.5 36.2 24.6 9.1 3.9 .0 .0 .0 .0

2 .012 9.7 24.7 35.5 25.6 4.5 .0 .0 .0 .0 .0

06/08/1992 25 1 .007 16.9 30.6 25.3 16.9 10.3 .0 .0 .0 .0 .0

2 .004 26.0 39.4 19.4 15.2 .0 .0 .0 .0 .0 .0

05/26/1993 196 1 3.59 2.1 6.3 9.1 14.3 9.3 9.4 4.4 45.1 .0 .0

2 4.57 2.4 8.0 11.6 14.4 10.3 14.2 14.0 25.1 .0 .0

05/26/1993 182 1 9.33 .8 2.5 5.4 12.4 12.1 14.3 15.1 4.0 33.4 .0

2 5.42 1.9 6.3 9.0 14.5 11.8 10.3 8.0 13.9 24.3 .0

05/27/1993 217 1 2.15 8.0 25.1 25.6 22.9 9.4 3.1 1.3 4.6 .0 .0

2 1.98 8.2 26.0 27.0 23.2 7.8 2.2 5.6 .0 .0 .0

05/27/1993 221 1 2.76 4.8 15.1 21.2 27.6 14.6 9.7 7.0 .0 .0 .0

2 1.96 7.1 21.7 22.0 23.3 11.7 6.4 7.8 .0 .0 .0

05/28/1993 216 1 6.24 1.4 4.1 4.5 2.9 1.3 1.1 12.7 41.8 30.2 .0

2 8.60 1.0 3.4 3.8 3.9 1.6 2.2 12.8 4.6 66.7 .0

05/28/1993 238 1 3.44 4.2 14.3 16.5 21.8 10.9 11.4 5.2 15.7 .0 .0

2 3.52 3.4 11.8 15.0 19.2 12.3 13.2 7.6 17.5 .0 .0

06/06/1993 155 1 .175 1.5 13.2 20.6 27.9 36.8 .0 .0 .0 .0 .0

2 .163 6.8 25.4 25.4 23.7 15.3 3.4 .0 .0 .0 .0

06/07/1993 153 1 .121 26.6 22.2 22.2 9.0 20.0 .0 .0 .0 .0 .0

2 2.33 .9 4.3 11.0 36.0 28.4 18.5 .9 .0 .0 .0

06/07/1993 137 1 .127 4.3 23.4 29.8 31.9 10.6 .0 .0 .0 .0 .0

2 .098 11.4 28.5 22.9 22.9 14.3 .0 .0 .0 .0 .0

06/08/1993 134 1 .067 8.7 26.1 21.7 34.8 8.7 .0 .0 .0 .0 .0

2 .135 6.0 24.0 24.0 30.0 16.0 .0 .0 .0 .0 .0

06/08/1993 133 1 .060 10.0 35.0 20.0 25.0 10.0 .0 .0 .0 .0 .0

2 .101 3.0 17.0 20.0 40.0 20.0 .0 .0 .0 .0 .0

06/09/1993 125 1 .043 6.0 19.0 25.0 38.0 12.0 .0 .0 .0 .0 .0

2 .109 5.0 17.5 17.5 35.0 25.0 .0 .0 .0 .0 .0

05/20/1997 275 1 81.7 .9 3.7 4.8 8.2 13.0 17.8 22.5 11.7 17.3 .0

282 2 55.0 1.6 5.6 7.2 12.9 20.2 21.7 22.4 8.3 .0 .0

05/21/1997 289 1 29.0 1.5 7.4 10.2 14.7 17.2 15.9 11.3 7.2 14.5 .0

289 2 21.0 1.8 8.0 7.4 7.1 6.2 7.2 17.3 22.3 22.6 .0

05/21/1997 337 1 60.1 1.0 4.9 4.8 6.3 6.7 6.9 14.7 32.2 22.6 .0

355 2 61.7 1.5 5.7 5.8 7.2 9.1 9.1 17.9 25.3 18.4 .0

05/22/1997 315 1 51.9 1.1 4.2 4.5 6.4 7.3 8.9 22.2 33.0 12.4 .0

289 2 41.1 1.1 5.1 5.9 9.2 10.8 9.4 12.6 15.9 29.9 .0

05/22/1997 324 1 37.9 1.5 5.8 6.0 9.5 12.9 12.6 15.8 16.8 19.2 .0

328 2 30.7 2.0 8.4 9.2 13.4 15.4 12.6 14.4 6.6 18.0 .0

05/28/1997 218 1 2.11 5.5 23.9 17.4 13.6 10.6 7.1 10.2 11.7 .0 .0

219 2 12.5 1.4 7.0 10.0 15.8 20.6 18.7 14.8 11.7 .0 .0

05/29/1997 240 1 27.8 1.0 5.4 10.2 14.9 13.3 9.8 11.1 22.6 11.8 .0

245 2 55.3 .7 2.5 4.7 8.7 13.5 17.5 19.4 17.6 15.3 .0

05/29/1997 248 1 13.7 2.3 13.4 16.4 18.7 18.5 13.4 10.0 7.2 .0 .0

(con.)

Table 2 (Con.)

Bedload

Water Traverse Percent retained on sieve size (mm)

Date discharge number Discharge Pan 0.25 0.5 1 2 4 8 16 32 64

cfs t/d
32 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

252 2 73.0 .7 2.7 4.7 8.1 11.8 12.8 17.5 18.3 13.9 9.5

05/30/1997 268 1 6.25 2.3 15.3 17.9 22.4 19.5 10.6 5.7 6.4 .0 .0

261 2 3.85 4.2 22.0 20.6 20.5 14.8 8.6 4.8 4.7 .0 .0

05/30/1997 261 1 10.4 2.5 10.1 10.6 14.6 13.3 9.6 11.0 8.4 19.9 .0

265 2 5.44 4.1 16.5 17.4 21.5 19.7 12.3 8.5 .0 .0 .0

05/30/1997 310 1 14.8 2.8 11.5 14.7 17.5 13.2 8.7 10.2 10.0 11.4 .0

316 2 30.7 1.6 7.0 9.1 12.2 12.7 10.7 11.2 19.9 15.6 .0

05/31/1997 275 1 8.19 2.4 8.3 12.7 17.0 21.9 17.7 20.0 .0 .0 .0

275 2 7.75 2.7 15.6 13.1 14.5 16.2 15.8 17.0 5.0 .0 .0

05/31/1997 285 1 13.8 2.2 11.7 11.4 14.0 14.0 10.0 9.9 2.3 24.5 .0

289 2 12.0 2.3 10.8 10.7 20.5 23.7 12.2 13.5 6.4 .0 .0

05/31/1997 328 1 23.0 2.8 10.2 9.3 9.3 9.2 10.5 17.6 31.1 .0 .0

337 2 23.1 3.4 13.9 12.7 15.5 19.9 18.8 11.7 4.0 .0 .0

06/01/1997 364 1 15.4 3.2 16.8 11.9 13.0 14.2 12.3 8.0 20.6 .0 .0

364 2 20.5 2.4 10.5 7.2 8.6 11.4 11.8 12.2 14.8 21.1 .0

06/01/1997 355 1 14.2 3.2 15.0 11.0 10.7 14.1 14.4 9.4 11.4 10.6 .0

355 2 19.5 2.7 14.0 11.2 13.7 20.5 19.6 13.3 5.1 .0 .0

06/01/1997 346 1 13.4 3.4 15.3 12.2 10.1 9.3 10.4 14.5 18.3 6.5 .0

350 2 11.8 4.9 23.7 16.4 9.6 3.5 1.3 2.4 23.9 14.2 .0

06/04/1997 394 1 98.1 2.5 7.8 6.8 8.5 10.9 15.9 20.2 16.6 10.9 .0

400 2 71.2 3.0 11.6 8.3 7.7 10.4 12.9 17.8 17.2 10.9 .0

06/05/1997 353 1 80.6 2.3 8.5 9.1 11.1 14.7 14.8 13.3 15.3 11.0 .0

350 2 76.8 2.4 9.6 8.6 9.8 11.4 10.2 10.3 15.7 22.0 .0

06/05/1997 350 1 109. 2.2 8.3 8.6 9.8 10.2 10.2 14.5 20.9 15.5 .0

358 2 80.2 2.9 13.1 10.3 9.0 7.6 8.3 19.1 17.4 1.2 11.2

06/05/1997 389 1 96.1 3.1 13.5 11.6 10.9 11.8 10.9 9.7 11.8 16.7 .0

399 2 107. 2.2 8.7 7.0 4.4 3.3 3.8 18.3 32.3 19.9 .0

06/05/1997 413 1 174. 1.7 7.2 7.4 7.8 7.7 7.3 8.3 18.0 28.3 6.5

404 2 94.6 3.2 14.5 14.5 14.6 14.6 10.7 9.1 11.1 7.8 .0

06/06/1997 350 1 56.9 3.7 18.3 14.3 16.2 16.4 12.0 11.2 7.8 .0 .0

337 2 47.8 3.7 18.3 14.2 13.5 10.9 8.8 10.5 12.5 7.7 .0

06/06/1997 328 1 35.3 3.8 22.6 16.6 14.3 10.8 7.8 7.1 5.4 11.6 .0

328 2 82.7 2.9 12.9 10.0 11.0 11.2 10.3 14.4 22.1 5.2 .0

06/10/1997 252 1 45.5 1.7 6.9 8.2 10.3 9.2 8.7 13.4 21.8 19.7 .0

259 2 35.9 2.1 9.8 10.5 12.2 12.0 11.7 11.5 8.2 22.1 .0

06/11/1997 217 1 60.5 1.1 4.7 5.5 5.6 8.7 21.7 31.6 18.4 2.7 .0

217 2 32.4 1.8 8.2 8.0 9.8 11.2 11.7 10.6 22.9 15.7 .0

06/11/1997 217 1 50.5 1.1 6.3 10.4 13.1 13.2 15.4 21.2 19.4 .0 .0

217 2 57.3 .9 4.2 6.1 8.2 11.4 13.8 18.0 28.0 9.6 .0

06/11/1997 212 1 37.3 1.5 7.3 13.4 20.3 20.4 14.2 11.1 7.9 3.9 .0

214 2 73.8 .7 3.0 6.6 16.2 22.7 19.5 15.8 14.2 1.2 .0

06/12/1997 201 1 6.56 2.6 13.7 22.1 26.8 18.1 10.3 4.6 1.8 .0 .0

198 2 14.0 1.7 7.6 13.3 19.8 18.3 13.4 13.3 4.9 7.7 .0

06/12/1997 194 1 9.36 2.2 8.9 14.1 18.2 14.8 13.0 13.6 15.2 .0 .0

194 2 7.24 1.7 7.3 12.6 17.4 12.7 6.2 13.8 7.5 20.7 .0

06/12/1997 201 1 7.45 2.0 11.1 14.1 12.5 6.4 2.3 2.4 2.7 46.6 .0

201 2 13.4 1.5 7.4 12.4 18.2 17.7 14.2 15.0 13.6 .0 .0

06/13/1997 180 1 5.05 2.4 12.2 15.9 20.2 17.5 10.2 13.8 7.8 .0 .0

180 2 5.90 1.7 10.7 13.1 14.3 13.2 12.4 26.2 8.5 .0 .0

06/13/1997 174 1 3.45 2.7 12.9 16.3 17.8 12.8 9.7 6.6 21.2 .0 .0

174 2 5.91 1.1 7.6 13.7 18.6 13.4 9.8 13.4 22.3 .0 .0

Table 2 (Con.)

Bedload

Water Traverse Percent retained on sieve size (mm)

Date discharge number Discharge Pan 0.25 0.5 1 2 4 8 16 32 64

cfs t/d
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 33

Table 3—Bedload particle-size distribution, percent finer than sieve size, Little Granite Creek, Wyoming, 1982–1993 and 1997.

Bedload

Water Traverse Percent finer than sieve size (mm)

Date discharge number Discharge 0.25 0.5 1 2 4 8 16 32 64 128

cfs t/d

05/27/82 354 1 9.18 2.0 17.1 31.5 43.6 52.8 59.4 64.9 69.9 100. 100.

06/02/82 204 1 1.44 1.5 11.2 23.2 38.8 53.4 65.5 68.8 100. 100. 100.

06/09/82 165 1 .477 2.7 23.0 47.7 76.2 94.4 100. 100. 100. 100. 100.

06/18/82 290 1 7.05 2.0 13.4 25.4 38.3 49.3 56.6 59.7 70.5 100. 100.

06/24/82 237 1 22.5 .7 4.7 9.4 16.9 26.7 37.8 56.6 85.8 100. 100.

06/29/82 215 1 14.2 .4 3.8 8.3 14.1 21.3 32.9 56.4 77.8 100. 100.

07/07/82 96 1 .293 2.5 17.7 33.6 49.2 65.1 84.8 96.4 100. 100. 100.

07/13/82 78 1 .191 6.3 23.7 41.9 59.7 73.7 91.1 100. 100. 100. 100.

05/17/83 35 1 .450 4.3 15.1 33.2 47.6 53.5 59.0 60.8 100. 100. 100.

05/25/83 160 1 3.61 10.2 66.0 78.3 84.6 90.8 97.4 100. 100. 100. 100.

06/01/83 259 1 30.9 .4 6.6 14.4 23.8 34.4 53.6 77.6 77.6 100. 100.

06/08/83 220 1 3.65 1.4 32.1 47.0 61.4 75.2 81.8 100. 100. 100. 100.

06/18/83 163 1 1.31 5.4 33.9 50.1 74. 93. 100. 100. 100. 100. 100.

06/22/83 119 1 1.38 2.7 24.2 42.6 64.4 81.1 93.8 100. 100. 100. 100.

06/29/83 93 1 .273 5.4 23.8 31.6 39.6 45.9 67.0 100. 100. 100. 100.

07/06/83 78 1 .272 4.5 32.3 47.5 63.4 75.1 100. 100. 100. 100. 100.

07/13/83 54 1 .135 5.0 35.8 57.7 80.1 100. 100. 100. 100. 100. 100.

04/18/84 49 1 .290 11.7 36.4 53.7 72.2 90.7 97.3 100. 100. 100. 100.

05/10/84 50 1 .685 7.7 20.4 42.9 79.1 98.1 100. 100. 100. 100. 100.

05/17/84 198 1 11.9 1.5 6.3 11.5 17.2 23.7 32.8 56.5 90.8 100. 100.

05/22/84 166 1 9.11 4.0 16.7 27.0 38.0 50.3 59.8 71.3 75.9 100. 100.

05/30/84 253 1 42.1 2.5 8.8 13.8 17.9 20.7 23.4 34.9 72.8 100. 100.

06/07/84 142 1 2.49 3.2 11.4 19.5 28.8 41.5 59.0 81.6 100. 100. 100.

06/13/84 111 1 .278 4.3 17.7 32.3 47.8 66.9 85.6 100. 100. 100. 100.

06/21/84 121 1 1.74 4.5 14.8 24.5 37.1 54.5 73.9 100. 100. 100. 100.

06/28/84 110 1 1.28 3.6 10.7 21.2 39.6 64.3 84.1 95.7 100. 100. 100.

07/06/84 74 1 .088 4.6 13.6 27.1 47.4 71.5 91.0 100. 100. 100. 100.

07/11/84 51 1 .035 5.9 17.7 31.4 43.2 51.0 80.4 100. 100. 100. 100.

07/18/84 41 1 .017 15.5 34.7 53.9 77.0 96.2 100. 100. 100. 100. 100.

05/08/85 139 1 1.91 11.5 39.2 57.2 72.2 80.8 88.2 93.3 100. 100. 100.

2 7.57 3.6 13.8 23.7 37.8 52.8 61.8 66.3 67.5 100. 100.

05/15/85 104 1 .156 12.1 34.5 52.3 69.1 76.6 84.1 85. 100. 100. 100.

2 1.62 1.8 5.7 12.6 26.9 46.1 68.2 100. 100. 100. 100.

05/25/85 129 1 1.14 8.1 28.4 50.4 71.4 83.4 92.9 100. 100. 100. 100.

2 2.00 7.2 23.0 37.5 57.0 72.6 82.3 86.7 100. 100. 100.

05/30/85 100 1 .726 3.3 13.4 31.7 57.3 76.8 86.5 100. 100. 100. 100.

2 1.77 1.5 5.9 14.8 30.9 50.4 71.7 100. 100. 100. 100.

06/05/85 68 1 .243 3.1 13.2 27.1 45.4 69.4 89.9 100. 100. 100. 100.

2 .443 1.5 6.7 18.8 43.2 74.6 97.2 100. 100. 100. 100.

06/13/85 56 1 1.09 1.0 4.4 11.4 27.2 50.9 75.9 100. 100. 100. 100.

2 .749 1.2 5.4 14.1 30.4 54.2 84.7 97.5 100. 100. 100.

06/19/85 44 1 .144 1.4 10.0 30.6 61.7 92.8 100. 100. 100. 100. 100.

2 .039 6.6 21.8 43.5 67.4 89.1 100. 100. 100. 100. 100.

06/27/85 29 1 .010 13.3 33.3 53.3 73.3 100. 100. 100. 100. 100. 100.

2 .013 5.6 33.4 55.6 77.8 100. 100. 100. 100. 100. 100.

07/02/85 25 1 .017 3.9 23.1 38.5 57.7 100. 100. 100. 100. 100. 100.

2 .019 37.9 58.6 100. 100. 100. 100. 100. 100. 100. 100.

07/11/85 24 1 .454 2.1 6.2 15.6 30.9 44.1 54.5 55.7 100. 100. 100.

2 .338 2.7 10.8 23.7 44.1 70.2 93.3 100. 100. 100. 100.

07/17/85 14 1 .017 8.0 28.0 48.0 76. 100. 100. 100. 100. 100. 100.

05/08/86 81 1 .178 15.5 40.6 52.1 59.5 75.8 89.9 100. 100. 100. 100.

05/14/86 71 1 .328 3.6 11.9 22.2 35.6 60.7 87.2 100. 100. 100. 100.

2 .934 2.4 12.5 27.8 51.9 78.7 97.4 100. 100. 100. 100.

05/20/86 130 1 1.85 10.8 37.9 52.7 65.4 74.7 83.7 92.4 100. 100. 100.

05/28/86 298 1 20.2 1.7 4.9 7.9 12.5 19.5 33.8 61.8 91.2 100. 100.

2 44.6 1.3 3.8 5.8 7.6 12.1 16.6 26.1 54.8 100. 100.

(con.)
34 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

06/03/86 403 1 46.0 .9 3.6 5.7 8.2 11.0 14.9 26.7 60.8 83.3 100.

2 11.0 3.2 9.2 16.1 27.4 43.7 62.3 80.3 97.4 100. 100.

06/12/86 250 1 .485 6.7 22.7 30.8 39.0 49.1 60.1 83.4 100. 100. 100.

2 1.61 3.3 9.7 13.3 16.2 21.1 35.0 62.2 100. 100. 100.

06/18/86 180 1 .735 1.0 23.5 47.7 67.2 80.9 87.7 100. 100. 100. 100.

2 .407 1.5 30.0 57.9 76.6 87.8 97.9 100. 100. 100. 100.

06/26/86 104 1 .396 .6 7.7 20.9 42.9 72.9 94.7 100. 100. 100. 100.

2 .494 .5 6.4 13.9 25.8 50.8 84.8 100. 100. 100. 100.

07/02/86 83 1 1.13 .7 3.3 10.3 25.2 49.0 74.2 92.7 100. 100. 100.

2 .336 2.1 10.3 31.4 55.3 71.6 81.6 100. 100. 100. 100.

07/10/86 57 1 .084 1.6 13.8 34.9 57.7 69.9 85.4 100. 100. 100. 100.

2 .061 2.3 11.3 24.8 40.5 56.2 74.2 100. 100. 100. 100.

07/16/86 46 1 .081 1.5 6.7 13.4 30.6 64.2 92.5 100. 100. 100. 100.

2 .120 1.5 8.6 19.2 36.4 70.2 100. 100. 100. 100. 100.

05/07/87 84 1 1.35 5.7 14.5 27.7 47.1 63.5 78.4 100. 100. 100. 100.

05/13/87 62 1 1.01 5.1 14.9 34.8 64.4 85.3 97.8 100. 100. 100. 100.

2 .391 3.9 15.7 32.4 49.0 64.0 76.8 100. 100. 100. 100.

05/22/87 66 1 1.53 2.8 6.0 12.5 26.4 48.5 78.6 95.6 100. 100. 100.

2 .541 2.4 12.0 27.0 46.6 68.5 86.7 100. 100. 100. 100.

05/28/87 106 1 7.76 2.0 7.0 19.3 38.0 56.2 74.1 90. 100. 100. 100.

2 2.05 4.3 12.9 26.9 46.7 65.4 83.5 100. 100. 100. 100.

06/03/87 74 1 1.63 2.4 6.8 14.3 29.2 51.0 77.4 96.8 100. 100. 100.

2 .096 4.2 13.9 33.3 69.1 88.5 96.4 100. 100. 100. 100.

05/12/88 68 1 .581 9.7 27.2 45.3 64.9 79.1 95.6 100. 100. 100. 100.

2 .496 9.9 30.0 49.2 71.7 85.4 93.0 100. 100. 100. 100.

05/18/88 156 1 .998 11.9 37.3 55.2 71.4 80.5 89.2 100. 100. 100. 100.

2 2.09 6.0 20.6 36.8 55.1 72.0 87.8 96.2 100. 100. 100.

05/27/88 149 1 1.03 4.2 12.8 23.2 36.6 49.4 58.6 71.4 100. 100. 100.

2 1.02 11.2 41.0 61.0 77.7 86.6 92.7 95.9 100. 100. 100.

06/03/88 75 1 .930 2.0 6.8 13.0 21.5 30.7 43.6 76.6 100. 100. 100.

2 1.20 1.3 3.9 7.5 15.8 31.8 63.4 90.9 100. 100. 100.

06/10/88 59 1 .068 4.0 11.1 25.2 53.5 73.7 100. 100. 100. 100. 100.

2 .117 3.6 14.8 33.1 54.4 75.7 100. 100. 100. 100. 100.

06/15/88 48 1 .061 7.6 36.6 66.7 85.0 92.5 100. 100. 100. 100. 100.

2 .147 1.9 7.5 23.9 55.8 82.1 100. 100. 100. 100. 100.

06/22/88 41 1 .023 2.9 14.7 29.4 58.8 100. 100. 100. 100. 100. 100.

2 .063 5.1 18.4 38.8 66.3 100. 100. 100. 100. 100. 100.

05/05/89 84 1 .441 2.0 10.9 24.0 51.4 77.1 98.4 100. 100. 100. 100.

2 1.42 3.7 9.3 22.5 51.1 80.8 97.9 100. 100. 100. 100.

05/09/89 173 1 5.03 3.0 23.2 39.4 50.8 56.1 59.7 62.8 83.9 100. 100.

2 6.45 2.7 19.7 37.1 54.6 70.9 84.3 94.1 100. 100. 100.

05/18/89 154 1 9.67 .6 1.5 4.5 13.4 28.0 42.7 54.9 61.2 100. 100.

2 2.19 4.0 13.1 24.8 42.8 60.8 82.8 95.6 100. 100. 100.

05/25/89 137 1 6.42 .8 3.1 10.2 27.4 50.1 71.4 89.9 100. 100. 100.

2 — — —— — — — — ———

06/02/89 119 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/07/89 166 1 4.51 2.5 9.3 19.8 35.8 53.7 71.2 88. 100. 100. 100.

2 1.31 5.6 22.2 40.5 55.6 66.9 71.9 77.4 100. 100. 100.

06/15/89 122 1 .147 7.4 33.5 61.1 89.5 100. 100. 100. 100. 100. 100.

2 .587 5.8 21.1 36.9 53.7 62.1 65. 66.9 100. 100. 100.

06/21/89 78 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/29/89 52 1 — — — — — — — — — — —

2 — — —— — — — — ———

07/05/89 45 1 — — — — — — — — — — —

2 — — —— — — — — ———

(con.)

Table 3 (Con.)

Bedload

Water Traverse Percent finer than sieve size (mm)

Date discharge number Discharge 0.25 0.5 1 2 4 8 16 32 64 128

cfs t/d
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 35

04/27/90 54 1 — — — — — — — — — — —

2 — — —— — — — — ———

05/03/90 45 1 — — — — — — — — — — —

05/10/90 69 1 .696 4.4 17.6 41.3 77.2 95.7 100. 100. 100. 100. 100.

2 — — —— — — — — ———

05/18/90 55 1 — — — — — — — — — — —

2 — — —— — — — — ———

05/25/90 72 1 — — — — — — — — — — —

2 — — —— — — — — ———

05/31/90 80 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/05/90 72 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/14/90 63 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/20/90 61 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/28/90 52 1 — — — — — — — — — — —

2 — — —— — — — — ———

07/05/90 34 1 — — — — — — — — — — —

2 — — —— — — — — ———

05/29/91 100 1 .017 12.5 37.5 59.4 78.2 93.8 100. 100. 100. 100. 100.

2 .088 7.6 31.1 49.3 66.0 86.4 100. 100. 100. 100. 100.

05/29/91 94 1 .075 5.5 16.5 25.7 43.1 52.3 68.8 100. 100. 100. 100.

2 .026 13.8 48.3 69.0 93.1 100. 100. 100. 100. 100. 100.

05/29/91 94 1 .140 9.9 50.0 77.2 95.0 100. 100. 100. 100. 100. 100.

2 .104 11.0 56.2 82.2 97.3 100. 100. 100. 100. 100. 100.

06/01/91 86 1 .062 6.5 41.3 67.4 91.3 97.8 100. 100. 100. 100. 100.

2 .083 6.4 37.1 56.5 71.0 82.3 100. 100. 100. 100. 100.

06/01/91 96 1 .048 8.9 47.1 70.6 91.2 100. 100. 100. 100. 100. 100.

2 .091 6.2 32.3 55.4 80.0 87.7 100. 100. 100. 100. 100.

06/01/91 84 1 .227 10.4 46.0 73.0 94.5 100. 100. 100. 100. 100. 100.

2 .107 7.3 34.5 58.0 81.5 85.2 100. 100. 100. 100. 100.

06/03/91 111 1 .363 9.1 44.7 72.7 92.1 98.9 100. 100. 100. 100. 100.

2 .895 5.3 25.9 45.7 71.8 86.5 94.7 100. 100. 100. 100.

06/03/91 149 1 .569 10.6 44.4 70.2 89.9 97.2 100. 100. 100. 100. 100.

2 .668 8.1 40.4 63.2 84.1 93.7 99.2 100. 100. 100. 100.

06/03/91 140 1 1.29 9.0 38.4 61.1 77.3 83.2 86.4 90.2 100. 100. 100.

2 1.01 8.4 37.3 58.5 77.3 85.1 89.7 93.2 100. 100. 100.

06/04/91 183 1 3.57 3.2 16.8 38.5 66.4 82.0 94.8 100. 100. 100. 100.

2 1.47 4.3 18.5 30.0 40.2 46.8 56.2 60.9 100. 100. 100.

06/04/91 190 1 1.93 4.9 22.6 42.7 68.7 84.1 96.7 100. 100. 100. 100.

2 2.11 5.9 28.7 47.1 69.0 84.0 98.2 100. 100. 100. 100.

06/11/91 143 1 .444 6.1 29.2 58.3 84.1 95.2 100. 100. 100. 100. 100.

2 .357 6.7 29.7 53.5 74.7 85.1 96.6 100. 100. 100. 100.

06/11/91 143 1 .787 2.3 11.7 29.4 60.9 78.2 88.9 100. 100. 100. 100.

2 .330 4.8 24.7 52.0 83.6 95.3 100. 100. 100. 100. 100.

06/11/91 144 1 .674 4.6 22.9 42.2 59.9 70.1 82.9 100. 100. 100. 100.

2 .295 5.5 28.5 53.9 80.2 89.4 94.9 100. 100. 100. 100.

06/11/91 158 1 .374 5.4 25.3 48.4 67.5 74. 77.3 77.3 100. 100. 100.

2 .504 8.3 38.9 69.2 92.8 99.7 100. 100. 100. 100. 100.

06/12/1991 150 1 1.20 3.1 14.8 35.7 69.3 89.5 98. 100. 100. 100. 100.

2 .617 4.3 18.6 39.2 69.2 83.3 96.8 100. 100. 100. 100.

06/12/1991 139 1 1.23 1.9 8.5 18.1 28.2 34.1 43.8 54.2 100. 100. 100.

2 .406 5.7 23.6 47.4 77.6 91.3 96.5 100. 100. 100. 100.

06/12/1991 148 1 .363 7.9 32.5 60.5 87.8 95.4 100. 100. 100. 100. 100.

2 .589 4.9 21.7 44.7 73.1 88.6 97.5 100. 100. 100. 100.

06/12/1991 154 1 .974 3.5 16.9 37.1 60.9 77.2 92.5 100. 100. 100. 100.

2 .389 7.3 30.9 60.4 86.8 96.2 100. 100. 100. 100. 100.

06/12/1991 159 1 .550 6.3 31.1 59.5 85.1 94.7 100. 100. 100. 100. 100.

(con.)

Table 3 (Con.)

Bedload

Water Traverse Percent finer than sieve size (mm)

Date discharge number Discharge 0.25 0.5 1 2 4 8 16 32 64 128

cfs t/d
36 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

2 .653 8.4 36.5 68.1 94.7 99.6 100. 100. 100. 100. 100.

06/12/1991 166 1 .942 5.7 22.5 40.6 59.5 69.1 78.8 90.1 100. 100. 100.

2 .487 8.5 36.4 65.7 88.6 97.4 100. 100. 100. 100. 100.

06/13/1991 156 1 .257 7.6 34.2 61.9 83.1 91.8 100. 100. 100. 100. 100.

2 .676 5.3 24.4 50.0 74.8 87.4 95.7 100. 100. 100. 100.

06/13/1991 152 1 .392 7.4 32.3 61.4 88.4 97.2 100. 100. 100. 100. 100.

2 .209 10.6 42.3 71.2 93.7 100. 100. 100. 100. 100. 100.

06/13/1991 146 1 .475 6.5 27.6 55.1 83.5 94.7 100. 100. 100. 100. 100.

2 1.29 3.1 14.7 33.1 64.2 82.4 91.6 100. 100. 100. 100.

06/05/1992 26 1 .004 12.5 33.2 70.4 96.8 100. 100. 100. 100. 100. 100.

2 .003 26.4 59.8 85.5 95.8 100. 100. 100. 100. 100. 100.

06/06/1992 26 1 .004 12.8 36.1 71.4 95.4 100. 100. 100. 100. 100. 100.

2 .019 4.6 21.4 49.5 76.1 100. 100. 100. 100. 100. 100.

06/07/1992 25 1 .035 5.7 26.2 62.4 87.0 96.1 100. 100. 100. 100. 100.

2 .012 9.7 34.4 69.9 95.5 100. 100. 100. 100. 100. 100.

06/08/1992 25 1 .007 16.9 47.5 72.8 89.7 100. 100. 100. 100. 100. 100.

2 .004 26.0 65.4 84.8 100. 100. 100. 100. 100. 100. 100.

05/26/93 196 1 3.59 2.1 8.4 17.5 31.8 41.1 50.5 54.9 100. 100. 100.

2 4.57 2.4 10.4 22.0 36.4 46.7 60.9 74.9 100. 100. 100.

05/26/93 182 1 9.33 .8 3.3 8.7 21.1 33.2 47.5 62.6 66.6 100. 100.

2 5.42 1.9 8.2 17.2 31.7 43.5 53.8 61.8 75.7 100. 100.

05/27/93 217 1 2.15 8.0 33.1 58.7 81.6 91.0 94.1 95.4 100. 100. 100.

2 1.98 8.2 34.2 61.2 84.4 92.2 94.4 100. 100. 100. 100.

05/27/93 221 1 2.76 4.8 19.9 41.1 68.7 83.3 93.0 100. 100. 100. 100.

2 1.96 7.1 28.8 50.8 74.1 85.8 92.2 100. 100. 100. 100.

05/28/93 216 1 6.24 1.4 5.5 10.0 12.9 14.2 15.3 28.0 69.8 100. 100.

2 8.60 1.0 4.4 8.2 12.1 13.7 15.9 28.7 33.3 100. 100.

05/28/93 238 1 3.44 4.2 18.5 35.0 56.8 67.7 79.1 84.3 100. 100. 100.

2 3.52 3.4 15.2 30.2 49.4 61.7 74.9 82.5 100. 100. 100.

06/06/93 155 1 .175 1.5 14.7 35.3 63.2 100. 100. 100. 100. 100. 100.

2 .163 6.8 32.2 57.6 81.3 96.6 100. 100. 100. 100. 100.

06/07/93 153 1 .121 26.6 48.8 71.0 80.0 100. 100. 100. 100. 100. 100.

2 2.33 .9 5.2 16.2 52.2 80.6 99.1 100. 100. 100. 100.

06/07/93 137 1 .127 4.3 27.7 57.5 89.4 100. 100. 100. 100. 100. 100.

2 .098 11.4 39.9 62.8 85.7 100. 100. 100. 100. 100. 100.

06/08/93 134 1 .067 8.7 34.8 56.5 91.3 100. 100. 100. 100. 100. 100.

2 .135 6.0 30.0 54.0 84.0 100. 100. 100. 100. 100. 100.

06/08/93 133 1 .060 10.0 45.0 65.0 90.0 100. 100. 100. 100. 100. 100.

2 .101 3.0 20.0 40.0 80.0 100. 100. 100. 100. 100. 100.

06/09/93 125 1 .043 6.0 25.0 50.0 88.0 100. 100. 100. 100. 100. 100.

2 .109 5.0 22.5 40.0 75.0 100. 100. 100. 100. 100. 100.

05/20/97 275 1 81.7 .9 4.6 9.5 17.7 30.7 48.5 71.0 82.7 100. 100.

282 2 55.0 1.6 7.2 14.4 27.4 47.6 69.3 91.7 100. 100. 100.

05/21/97 289 1 29.0 1.5 8.9 19.2 33.9 51.0 67.0 78.3 85.5 100. 100.

289 2 21.0 1.8 9.8 17.2 24.3 30.6 37.7 55.0 77.4 100. 100.

05/21/97 337 1 60.1 1.0 5.9 10.7 17.0 23.7 30.6 45.3 77.4 100. 100.

355 2 61.7 1.5 7.2 13.0 20.2 29.3 38.4 56.3 81.6 100. 100.

05/22/97 315 1 51.9 1.1 5.3 9.8 16.2 23.5 32.4 54.6 87.6 100. 100.

289 2 41.1 1.1 6.3 12.2 21.4 32.2 41.6 54.2 70.1 100. 100.

05/22/97 324 1 37.9 1.5 7.2 13.3 22.7 35.7 48.2 64.0 80.8 100. 100.

328 2 30.7 2.0 10.4 19.6 33.1 48.4 61.0 75.4 82.0 100. 100.

05/28/97 218 1 2.11 5.5 29.4 46.8 60.3 71.0 78.1 88.3 100. 100. 100.

219 2 12.5 1.4 8.4 18.4 34.2 54.8 73.5 88.3 100. 100. 100.

05/29/97 240 1 27.8 1.0 6.4 16.6 31.4 44.7 54.5 65.6 88.2 100. 100.

245 2 55.3 .7 3.3 8.0 16.7 30.2 47.7 67.1 84.7 100. 100.

05/29/97 248 1 13.7 2.3 15.7 32.1 50.8 69.3 82.8 92.8 100. 100. 100.

(con.)

Table 3 (Con.)

Bedload

Water Traverse Percent finer than sieve size (mm)

Date discharge number Discharge 0.25 0.5 1 2 4 8 16 32 64 128

cfs t/d
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 37

252 2 73.0 .7 3.3 8.0 16.1 27.9 40.8 58.3 76.6 90.5 100.

05/30/97 268 1 6.25 2.3 17.6 35.5 57.9 77.3 87.9 93.6 100. 100. 100.

261 2 3.85 4.2 26.2 46.7 67.2 82.0 90.6 95.3 100. 100. 100.

05/30/97 261 1 10.4 2.5 12.6 23.2 37.8 51.1 60.7 71.7 80.1 100. 100.

265 2 5.44 4.1 20.6 38.0 59.5 79.2 91.5 100. 100. 100. 100.

05/30/97 310 1 14.8 2.8 14.3 29.0 46.6 59.7 68.4 78.6 88.6 100. 100.

316 2 30.7 1.6 8.6 17.7 29.9 42.6 53.3 64.5 84.4 100. 100.

05/31/97 275 1 8.19 2.4 10.7 23.4 40.4 62.3 80.0 100. 100. 100. 100.

275 2 7.75 2.7 18.3 31.4 45.9 62.1 77.9 95.0 100. 100. 100.

05/31/97 285 1 13.8 2.2 13.9 25.3 39.3 53.4 63.4 73.2 75.5 100. 100.

289 2 12.0 2.3 13.0 23.7 44.2 67.9 80.1 93.6 100. 100. 100.

05/31/97 328 1 23.0 2.8 13.0 22.3 31.6 40.9 51.3 68.9 100. 100. 100.

337 2 23.1 3.4 17.3 30.0 45.6 65.4 84.3 96.0 100. 100. 100.

06/01/97 364 1 15.4 3.2 20.0 31.9 45.0 59.1 71.4 79.4 100. 100. 100.

364 2 20.5 2.4 12.9 20.1 28.7 40.1 51.9 64.1 78.9 100. 100.

06/01/97 355 1 14.2 3.2 18.3 29.3 40.0 54.1 68.5 77.9 89.4 100. 100.

355 2 19.5 2.7 16.7 27.9 41.6 62. 81.6 94.9 100. 100. 100.

06/01/97 346 1 13.4 3.4 18.6 30.8 40.9 50.2 60.6 75.1 93.5 100. 100.

350 2 11.8 4.9 28.6 45.0 54.6 58.2 59.5 61.9 85.8 100. 100.

06/04/97 394 1 98.1 2.5 10.3 17.1 25.6 36.5 52.4 72.5 89.1 100. 100.

400 2 71.2 3.0 14.7 23.0 30.7 41.1 54.0 71.9 89.1 100. 100.

06/05/97 353 1 80.6 2.3 10.7 19.8 30.9 45.6 60.4 73.7 89.0 100. 100.

350 2 76.8 2.4 12.0 20.6 30.4 41.8 52.1 62.4 78.0 100. 100.

06/05/97 350 1 109. 2.2 10.4 19.0 28.8 39. 49.2 63.6 84.5 100. 100.

358 2 80.2 2.9 16.0 26.3 35.3 42.8 51.1 70.2 87.6 88.8 100.

06/05/97 389 1 96.1 3.1 16.6 28.2 39.1 50.9 61.8 71.5 83.3 100. 100.

399 2 107. 2.2 11.0 18.0 22.4 25.7 29.5 47.8 80.1 100. 100.

06/05/97 413 1 174. 1.7 8.9 16.3 24.1 31.7 39.0 47.3 65.3 93.5 100.

404 2 94.6 3.2 17.7 32.2 46.8 61.4 72.0 81.1 92.2 100. 100.

06/06/97 350 1 56.9 3.7 22.0 36.3 52.5 68.9 80.9 92.2 100. 100. 100.

337 2 47.8 3.7 22.0 36.2 49.6 60.5 69.3 79.8 92.3 100. 100.

06/06/97 328 1 35.3 3.8 26.4 43.0 57.2 68.1 75.9 83.0 88.4 100. 100.

328 2 82.7 2.9 15.8 25.9 36.9 48.1 58.4 72.8 94.8 100. 100.

06/10/97 252 1 45.5 1.7 8.7 16.9 27.2 36.5 45.1 58.5 80.3 100. 100.

259 2 35.9 2.1 11.9 22.4 34.5 46.6 58.2 69.7 77.9 100. 100.

06/11/97 217 1 60.5 1.1 5.8 11.2 16.8 25.6 47.3 78.9 97.3 100. 100.

217 2 32.4 1.8 10.0 18.0 27.8 39.1 50.7 61.4 84.3 100. 100.

06/11/97 217 1 50.5 1.1 7.3 17.7 30.8 44. 59.4 80.6 100. 100. 100.

217 2 57.3 .9 5.0 11.1 19.3 30.7 44.5 62.4 90.4 100. 100.

06/11/97 212 1 37.3 1.5 8.8 22.3 42.6 63. 77.1 88.2 96.1 100. 100.

214 2 73.8 .7 3.8 10.4 26.5 49.2 68.8 84.6 98.8 100. 100.

06/12/97 201 1 6.56 2.6 16.3 38.4 65.2 83.3 93.6 98.2 100. 100. 100.

198 2 14.0 1.7 9.3 22.6 42.4 60.6 74.0 87.4 92.3 100. 100.

06/12/97 194 1 9.36 2.2 11.1 25.2 43.3 58.2 71.2 84.8 100. 100. 100.

194 2 7.24 1.7 9.0 21.6 39.1 51.7 57.9 71.8 79.3 100. 100.

06/12/97 201 1 7.45 2.0 13.0 27.2 39.7 46.0 48.3 50.7 53.4 100. 100.

201 2 13.4 1.5 8.9 21.3 39.5 57.2 71.4 86.4 100. 100. 100.

06/13/97 180 1 5.05 2.4 14.6 30.5 50.7 68.3 78.4 92.2 100. 100. 100.

180 2 5.90 1.7 12.4 25.5 39.8 53.0 65.3 91.5 100. 100. 100.

06/13/97 174 1 3.45 2.7 15.6 31.9 49.7 62.5 72.2 78.8 100. 100. 100.

174 2 5.91 1.1 8.8 22.4 41.1 54.4 64.3 77.7 100. 100. 100.

Table 3 (Con.)

Bedload

Water Traverse Percent finer than sieve size (mm)

Date discharge number Discharge 0.25 0.5 1 2 4 8 16 32 64 128

cfs t/d
38 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

Table 4—Bedload particle-size distribution, computed particle size at specific percentages, Little Granite Creek, Wyoming 1982–1993 and 1997.

Bedload

Water Traverse Computed particle size (mm) at specific percentages

Date discharge number Discharge D5 D16 D25 D35 D50 D65 D75 D84 D90 D95

cfs t/d

05/27/82 354 1 9.18 0.32 0.49 0.75 1.23 3.24 16.2 33.4 36.5 39.4 43.5

06/02/82 204 1 1.44 .37 .68 1.09 1.71 3.41 7.76 16.8 18.4 19.8 21.8

06/09/82 165 1 .477 .30 .43 .53 .72 1.05 1.49 1.93 2.51 3.14 4.11

06/18/82 290 1 7.05 .34 .59 .98 1.69 4.27 22.3 33.2 36.3 39.3 43.4

06/24/82 237 1 22.5 .53 1.84 3.59 6.78 12.6 18.9 23.6 30.3 34.4 39.1

06/29/82 215 1 14.2 .63 2.41 5.08 8.55 13.3 20.7 28.8 34.4 37.4 41.7

07/07/82 96 1 .293 .31 .48 .72 1.07 2.07 3.98 5.46 7.76 10.1 13.9

07/13/82 78 1 .191 .23 .39 .53 .78 1.37 2.57 4.16 5.71 7.51 9.03

05/17/83 35 1 .450 .27 .52 .76 1.10 2.65 16.5 17.7 19.2 20.6 22.5

05/25/83 160 1 3.61 .20 .30 .36 .43 .60 .97 1.63 3.78 7.21 11.4

06/01/83 259 1 30.9 .80 2.26 4.14 5.31 7.40 10.9 14.7 17.2 18.7 20.9

06/08/83 220 1 3.65 .34 .49 .75 1.15 2.31 4.74 7.91 16.5 18.1 20.3

06/18/83 163 1 1.31 .24 .43 .64 1.05 1.99 3.03 4.11 5.38 6.81 8.62

06/22/83 119 1 1.38 .32 .64 1.04 1.53 2.52 4.09 6.05 9.07 12.2 16.8

06/29/83 93 1 .273 .24 .49 1.12 2.70 9.12 14.9 17.1 18.6 20.0 22.0

07/06/83 78 1 .272 .26 .46 .71 1.14 2.23 4.37 7.95 8.79 9.54 10.6

07/13/83 54 1 .135 .25 .46 .67 .97 1.57 2.45 3.34 4.20 4.59 5.14

04/18/84 49 1 .290 .17 .29 .38 .49 .86 1.51 2.17 2.95 3.85 5.79

05/10/84 50 1 .685 .19 .41 .59 .80 1.13 1.49 1.82 2.22 2.59 3.16

05/17/84 198 1 11.9 .44 1.73 4.45 8.57 13.3 18.3 21.7 26.3 31.1 36.3

05/22/84 166 1 9.11 .27 .49 .89 1.67 3.93 10.8 27.8 34.9 37.9 42.2

05/30/84 253 1 42.1 .36 1.44 8.89 16.0 21.0 27.4 32.6 35.8 38.7 42.9

06/07/84 142 1 2.49 .31 .76 1.53 2.84 5.6 9.41 12.7 16.5 18.1 20.3

06/13/84 111 1 .278 .27 .47 .73 1.14 2.16 3.72 5.20 7.46 8.63 9.79

06/21/84 121 1 1.74 .26 .55 1.03 1.80 3.35 5.72 8.08 8.87 9.61 10.7

06/28/84 110 1 1.28 .30 .73 1.18 1.71 2.67 4.08 5.61 8.01 10.5 14.9

07/06/84 74 1 .088 .26 .58 .91 1.33 2.15 3.28 4.40 5.89 7.59 9.04

07/11/84 51 1 .035 .23 .46 .74 1.25 3.66 5.40 6.88 8.37 9.15 10.3

07/18/84 41 1 .017 .12 .25 .37 .51 .87 1.36 1.87 2.38 2.88 3.67

05/08/85 139 1 1.91 .18 .29 .37 .46 .76 1.42 2.47 5.32 9.91 17.1

2 7.57 .29 .59 1.07 1.76 3.52 13.1 33.9 37.0 39.89 43.9

05/15/85 104 1 .156 .16 .29 .39 .51 .92 1.67 3.42 8.19 17.4 19.7

2 1.62 .46 1.21 1.85 2.72 4.51 7.19 8.44 9.21 9.94 11.0

05/25/85 129 1 1.14 .21 .35 .46 .64 1.05 1.62 2.40 4.17 6.17 8.64

2 2.00 .21 .39 .56 .90 1.56 2.81 4.68 10.5 17.0 19.3

05/30/85 100 1 .726 .30 .56 .80 1.10 1.65 2.58 3.72 6.60 8.52 9.69

2 1.77 .46 1.06 1.60 2.34 3.96 6.35 8.23 9.01 9.75 10.8

06/05/85 68 1 .243 .31 .59 .92 1.37 2.27 3.49 4.65 6.24 8.02 9.23

2 .443 .43 .88 1.23 1.63 2.31 3.18 4.03 4.83 5.64 6.90

06/13/85 56 1 1.09 .54 1.27 1.85 2.55 3.89 5.78 7.77 8.73 9.49 10.6

2 .749 .48 1.09 1.63 2.30 3.54 4.93 6.14 7.86 9.69 12.7

06/19/85 44 1 .144 .38 .64 .86 1.11 1.55 2.11 2.50 3.04 3.60 4.33

2 .039 .22 .41 .56 .78 1.20 1.86 2.44 3.26 4.08 4.68

06/27/85 29 1 .010 .15 .28 .39 .53 .89 1.48 2.03 2.23 2.41 2.68

2 .013 .24 .36 .43 .53 .84 1.31 1.81 2.15 2.34 2.61

07/02/85 25 1 .017 .27 .42 .55 .87 1.52 2.10 2.25 2.43 2.6 2.84

2 .019 .04 .10 .15 .23 .38 .52 .56 .61 .65 .71

07/11/85 24 1 .454 .43 1.02 1.58 2.50 5.93 17.0 18.2 19.6 21.0 22.9

2 .338 .33 .68 1.05 1.50 2.33 3.45 4.44 5.60 6.85 8.54

07/17/85 14 1 .017 .20 .35 .46 .65 1.05 1.49 1.94 2.18 2.37 2.64

05/08/86 81 1 .178 .14 .25 .34 .44 .88 2.49 3.85 5.74 8.02 9.23

05/14/86 71 1 .328 .30 .68 1.17 1.94 2.98 4.38 5.53 7.18 8.43 9.61

2 .934 .33 .60 .90 1.25 1.90 2.73 3.57 4.52 5.37 6.68

05/20/86 130 1 1.85 .18 .30 .38 .47 .88 1.96 4.08 8.22 12.7 17.5

05/28/86 298 1 20.2 .51 2.86 5.35 8.25 12.0 16.9 20.5 25.4 30.5 36.0

2 44.6 .78 7.21 14.90 20.2 28.7 34.1 36.4 39.5 42.1 45.8

06/03/86 403 1 46.0 .82 8.56 14.70 19.2 25.9 35.8 47.8 64.7 71.1 80.1

2 11.0 .33 .98 1.75 2.80 5.05 8.78 12.7 17.5 21.0 26.5

06/12/86 250 1 .485 .22 .40 .62 1.44 4.23 9.07 12.0 16.2 17.7 20.0

(con.)
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 39

Table 4 (Con.)

Bedload

Water Traverse Computed particle size (mm) at specific percentages

Date discharge number Discharge D5 D16 D25 D35 D50 D65 D75 D84 D90 D95

cfs t/d

2 1.61 .32 1.86 4.95 8.00 11.7 16.3 17.5 19.0 20.4 22.4

06/18/86 180 1 .735 .34 .44 .53 .71 1.08 1.84 2.90 5.43 8.36 9.55

2 .407 .31 .41 .47 .57 .83 1.28 1.88 3.09 4.39 5.87

06/26/86 104 1 .396 .44 .81 1.16 1.59 2.34 3.28 4.18 5.23 6.36 8.11

2 .494 .46 1.15 1.92 2.63 3.92 5.14 6.27 7.85 8.72 9.87

07/02/86 83 1 1.13 .63 1.36 1.99 2.71 4.10 6.10 8.17 10.8 13.8 17.4

2 .336 .36 .63 .85 1.12 1.72 2.98 4.97 8.26 9.04 10.2

07/10/86 57 1 .084 .35 .55 .75 1.00 1.59 3.00 4.88 7.46 8.66 9.81

2 .061 .34 .66 1.01 1.59 3.05 5.52 8.06 8.85 9.60 10.7

07/16/86 46 1 .081 .43 1.13 1.65 2.20 2.99 4.06 4.89 6.03 7.23 8.74

2 .120 .39 .83 1.30 1.90 2.63 3.57 4.16 4.55 4.92 5.43

05/07/87 84 1 1.35 .23 .55 .89 1.32 2.26 4.26 6.72 8.54 9.31 10.4

05/13/87 62 1 1.01 .25 .52 .74 1.01 1.43 2.03 2.73 3.80 4.73 6.14

2 .391 .28 .50 .76 1.12 2.09 4.21 7.19 8.66 9.42 10.5

05/22/87 66 1 1.53 .42 1.22 1.89 2.67 4.13 5.69 7.25 9.36 11.6 15.3

2 .541 .33 .62 .93 1.35 2.20 3.56 4.94 7.07 8.50 9.67

05/28/87 106 1 7.76 .41 .86 1.27 1.81 3.17 10.1 11.7 13.9 16.0 18.4

2 2.05 .27 .60 .92 1.35 2.26 3.94 5.59 8.07 8.86 10.0

06/03/87 74 1 1.63 .40 1.09 1.68 2.43 3.88 5.63 7.41 9.34 11.2 14.0

2 .096 .27 .55 .77 1.04 1.38 1.84 2.38 3.28 4.40 6.70

05/12/88 68 1 .581 .18 .34 .47 .68 1.18 2.01 3.21 4.63 5.76 7.63

2 .496 .19 .33 .44 .61 1.02 1.61 2.31 3.70 5.82 8.62

05/18/88 156 1 .998 .17 .29 .38 .48 .82 1.50 2.59 5.18 8.14 9.34

2 2.09 .23 .42 .62 .93 1.65 2.96 4.46 6.57 9.14 13.8

05/27/88 149 1 1.03 .28 .63 1.11 1.85 4.18 11.2 16.5 18.1 19.5 21.6

2 1.02 .19 .29 .37 .45 .68 1.17 1.76 3.22 5.67 12.7

06/03/88 75 1 .930 .41 1.30 2.64 5.09 9.07 12.3 15.4 17.4 18.9 21.0

2 1.20 .64 2.01 3.07 4.31 5.98 8.24 10.1 12.7 15.4 18.1

06/10/88 59 1 .068 .29 .66 .99 1.30 1.85 2.92 4.05 4.44 4.81 5.34

2 .117 .29 .53 .76 1.07 1.74 2.77 3.90 4.37 4.75 5.28

06/15/88 48 1 .061 .22 .33 .41 .49 .68 .96 1.32 1.92 3.05 4.37

2 .147 .40 .76 1.03 1.30 1.78 2.48 3.21 4.11 4.50 5.06

06/22/88 41 1 .023 .31 .54 .83 1.15 1.64 2.08 2.23 2.42 2.59 2.83

2 .063 .25 .46 .65 .89 1.32 1.93 2.14 2.33 2.51 2.76

05/05/89 84 1 .441 .35 .68 1.03 1.35 1.94 2.82 3.74 4.54 5.22 6.25

2 1.42 .31 .74 1.07 1.39 1.95 2.68 3.41 4.32 5.11 6.35

05/09/89 173 1 5.03 .28 .39 .45 .66 1.91 17.0 23.0 32.1 35.3 39.8

2 6.45 .30 .46 .63 .93 1.67 3.08 4.83 7.91 11.3 16.6

05/18/89 154 1 9.67 1.06 2.31 3.55 5.64 12.1 32.8 35.3 38.3 41.1 44.9

2 2.19 .28 .61 1.01 1.51 2.64 4.49 6.05 8.40 10.9 15.1

05/25/89 137 1 6.42 .65 1.32 1.85 2.56 3.99 6.41 8.90 12.2 16.0 18.5

2 — — —— — — — — ———

06/02/89 119 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/07/89 166 1 4.51 .35 .80 1.28 1.94 3.47 6.18 9.10 13.1 16.6 19.0

2 1.31 .24 .41 .56 .83 1.55 3.54 11.7 17.2 18.8 20.9

06/15/89 122 1 .147 .22 .34 .42 .52 .76 1.08 1.32 1.67 2.02 2.32

2 .587 .23 .42 .61 .93 1.72 8.00 17.1 18.6 20.0 22.0

06/21/89 78 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/29/89 52 1 — — — — — — — — — — —

2 — — —— — — — — ———

07/05/89 45 1 — — — — — — — — — — —

2 — — —— — — — — ———

04/27/90 54 1 — — — — — — — — — — —

2 — — —— — — — — ———

05/03/90 45 1 — — — — — — — — — — —

(con.)
40 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

05/10/90 69 1 .696 .26 .47 .64 .85 1.17 1.54 1.90 2.40 2.93 3.80

2 — — —— — — — — ———

05/18/90 55 1 — — — — — — — — — — —

2 — — —— — — — — ———

05/25/90 72 1 — — — — — — — — — — —

2 — — —— — — — — ———

05/31/90 80 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/05/90 72 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/14/90 63 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/20/90 61 1 — — — — — — — — — — —

2 — — —— — — — — ———

06/28/90 52 1 — — — — — — — — — — —

2 — — —— — — — — ———

07/05/90 34 1 — — — — — — — — — — —

2 — — —— — — — — ———

05/29/91 100 1 .017 .17 .28 .37 .47 .74 1.21 1.75 2.45 3.17 4.20

2 .088 .21 .34 .44 .59 1.03 1.92 2.61 3.62 4.27 4.85

05/29/91 94 1 .075 .24 .49 .95 1.47 3.37 6.76 8.41 9.18 9.91 10.9

2 .026 .17 .27 .33 .40 .53 .87 1.13 1.43 1.74 2.15

05/29/91 94 1 .140 .21 .29 .35 .41 .51 .73 .94 1.22 1.51 2.00

2 .104 .20 .28 .33 .38 .46 .62 .80 1.06 1.28 1.65

06/01/91 86 1 .062 .23 .33 .39 .46 .63 .94 1.19 1.52 1.89 2.71

2 .083 .23 .34 .41 .48 .79 1.48 2.50 4.10 4.49 5.05

06/01/91 86 1 .048 .21 .30 .36 .42 .54 .84 1.12 1.48 1.88 2.25

2 .091 .23 .35 .44 .55 .85 1.28 1.70 2.82 4.18 4.77

06/01/91 84 1 .227 .20 .29 .36 .42 .55 .80 1.04 1.31 1.6 2.05

2 .107 .22 .34 .42 .51 .79 1.20 1.60 3.24 4.34 4.92

06/03/91 111 1 .363 .21 .30 .37 .42 .57 .81 1.06 1.41 1.79 2.40

2 .895 .25 .39 .49 .70 1.12 1.65 2.27 3.49 5.09 8.11

06/03/91 149 1 .569 .20 .29 .36 .43 .58 .86 1.14 1.55 2.01 2.99

2 .668 .22 .32 .39 .46 .67 1.05 1.42 2.00 2.89 4.38

06/03/91 140 1 1.29 .20 .31 .39 .47 .71 1.17 1.79 4.85 15.4 18.4

2 1.01 .21 .32 .40 .48 .76 1.25 1.82 3.63 8.44 17.1

06/04/91 183 1 3.57 .29 .49 .67 .91 1.33 1.93 2.85 4.34 5.72 8.08

2 1.47 .27 .46 .76 1.42 5.06 16.4 17.7 19.2 20.6 22.5

06/04/91 190 1 1.93 .25 .41 .55 .78 1.21 1.80 2.58 4.00 5.05 6.82

2 2.11 .24 .37 .46 .64 1.09 1.75 2.56 4.01 4.79 6.02

06/11/91 143 1 .444 .23 .37 .46 .58 .83 1.17 1.50 2.00 2.69 3.92

2 .357 .23 .36 .45 .59 .91 1.43 2.04 3.71 4.95 6.82

06/11/91 143 1 .787 .34 .61 .87 1.14 1.58 2.32 3.46 5.66 8.19 9.39

2 .330 .25 .40 .51 .66 .95 1.29 1.59 2.04 2.71 3.88

06/11/91 144 1 .674 .26 .41 .55 .79 1.36 2.80 5.09 8.13 8.92 10.1

2 .295 .24 .37 .47 .61 .90 1.30 1.70 2.60 4.25 8.38

06/11/91 158 1 .374 .24 .39 .50 .68 1.06 1.82 4.91 17.3 18.8 20.9

2 .504 .21 .32 .39 .47 .64 .90 1.13 1.43 1.76 2.21

06/12/91 150 1 1.20 .30 .52 .73 .98 1.34 1.82 2.34 3.16 4.10 5.61

2 .617 .27 .46 .64 .88 1.28 1.80 2.59 4.11 5.12 6.80

06/12/91 139 1 1.23 .38 .88 1.63 4.28 12.1 17.1 18.3 19.7 21.1 23.0

2 .406 .24 .40 .52 .71 1.06 1.46 1.86 2.64 3.66 6.20

06/12/91 148 1 .363 .21 .34 .43 .53 .77 1.10 1.37 1.76 2.34 3.79

2 .589 .25 .42 .56 .76 1.13 1.62 2.14 3.14 4.29 5.99

06/12/91 154 1 .974 .29 .48 .68 .94 1.46 2.35 3.60 5.16 6.84 8.74

2 .389 .22 .35 .44 .55 .79 1.10 1.40 1.82 2.38 3.49

06/12/91 159 1 .550 .23 .36 .44 .55 .80 1.13 1.46 1.93 2.67 4.06

2 .653 .21 .32 .40 .49 .67 .93 1.13 1.38 1.63 2.04

06/12/91 166 1 .942 .24 .41 .56 .82 1.41 2.95 6.00 10.6 15.9 18.4

2 .487 .21 .32 .40 .49 .69 .98 1.26 1.67 2.15 3.02

Table 4 (Con.)

Bedload

Water Traverse Computed particle size (mm) at specific percentages

Date discharge number Discharge D5 D16 D25 D35 D50 D65 D75 D84 D90 D95

cfs t/d

(con.)
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 41

06/13/91 156 1 .257 .22 .34 .42 .51 .74 1.09 1.48 2.14 3.36 4.44

2 .676 .25 .40 .51 .69 1.04 1.52 2.02 3.24 4.72 7.33

06/13/91 152 1 .392 .22 .34 .43 .54 .77 1.08 1.34 1.72 2.18 3.09

2 .209 .19 .29 .37 .44 .60 .85 1.09 1.37 1.68 2.11

06/13/91 146 1 .475 .23 .37 .47 .61 .88 1.24 1.57 2.06 2.79 4.06

2 1.29 .30 .53 .76 1.05 1.46 2.05 2.92 4.45 6.89 8.93

06/05/92 26 1 .004 .16 .29 .40 .52 .68 .90 1.08 1.28 1.48 1.79

2 .003 .11 .19 .24 .30 .41 .56 .72 .95 1.26 1.84

06/06/92 26 1 .004 .16 .28 .38 .49 .65 .87 1.07 1.31 1.56 1.95

2 .019 .26 .43 .56 .72 1.01 1.47 1.93 2.18 2.37 2.64

06/07/92 25 1 .035 .24 .38 .49 .60 .80 1.06 1.36 1.80 2.37 3.52

2 .012 .19 .32 .41 .51 .68 .90 1.10 1.33 1.57 1.94

06/08/92 25 1 .007 .15 .24 .31 .39 .53 .80 1.07 1.51 2.01 2.32

2 .004 .13 .20 .25 .30 .38 .50 .68 .97 1.09 1.23

05/26/93 196 1 3.59 .38 .90 1.48 2.56 7.71 17.0 18.2 19.7 21.0 22.9

2 4.57 .35 .72 1.17 1.88 4.69 9.68 16.0 17.6 19.1 21.2

05/26/93 182 1 9.33 .66 1.57 2.55 4.38 8.96 24.2 34.2 37.2 40.1 44.1

2 5.42 .39 .92 1.49 2.45 6.20 18.6 30.8 35.0 38.0 42.3

05/27/93 217 1 2.15 .21 .33 .42 .53 .79 1.18 1.59 2.34 3.65 12.7

2 1.98 .21 .33 .41 .51 .75 1.10 1.45 1.98 3.17 8.21

05/27/93 221 1 2.76 .25 .44 .61 .84 1.25 1.81 2.62 4.19 6.15 8.62

2 1.96 .22 .36 .46 .62 .98 1.50 2.09 3.56 6.09 8.80

05/28/93 216 1 6.24 .47 8.76 17.40 20.2 24.6 29.9 33.4 36.5 39.4 43.5

2 8.60 .57 7.93 13.40 32.3 34.9 37.6 39.9 42.5 45.0 48.3

05/28/93 238 1 3.44 .27 .46 .68 1.00 1.62 3.35 5.25 7.93 8.78 9.92

2 3.52 .28 .39 .46 .60 1.03 2.35 4.03 8.17 8.96 10.1

06/06/93 155 1 .175 .35 .53 .74 .99 1.44 2.03 2.18 2.37 2.54 2.79

2 .163 .23 .35 .43 .54 .82 1.21 1.62 2.17 2.68 3.50

06/07/93 153 1 .121 .08 .16 .24 .33 .52 .82 1.34 2.10 2.30 2.57

2 2.33 .49 .99 1.23 1.49 1.93 2.66 3.40 4.26 4.85 5.74

06/07/93 137 1 .127 .26 .39 .48 .60 .85 1.14 1.37 1.70 2.03 2.33

2 .098 .18 .29 .37 .46 .68 1.06 1.39 1.88 2.16 2.45

06/08/93 134 1 .067 .20 .32 .41 .50 .82 1.14 1.35 1.62 1.91 2.25

2 .135 .24 .36 .45 .58 .90 1.25 1.56 2.00 2.20 2.49

06/08/93 133 1 .060 .20 .30 .36 .43 .59 1.00 1.25 1.61 2.00 2.30

2 .101 .29 .45 .61 .86 1.17 1.50 1.80 2.10 2.30 2.57

06/09/93 125 1 .043 .09 .18 .25 .34 .52 .64 .75 .91 1.04 1.19

2 .109 .25 .41 .56 .83 1.21 1.61 2.00 1.20 2.39 2.65

05/20/97 275 1 81.7 .54 1.79 3.12 4.97 8.54 13.9 21.5 33.1 38.3 42.7

282 2 55.0 .40 1.12 1.82 2.76 4.45 7.21 10.0 13.3 15.4 20.4

05/21/97 289 1 29.0 .37 .85 1.40 2.13 3.88 7.51 13.7 28.7 42.6 54.3

289 2 21.0 .35 .92 2.22 6.47 13.7 23.1 30.3 35.2 38.1 40.6

05/21/97 337 1 60.1 .45 1.84 4.75 10.4 18.3 25.8 30.8 36.9 41.5 45.2

355 2 61.7 .40 1.42 3.05 6.51 13.2 21.5 27.8 33.7 37.9 41.5

05/22/97 315 1 51.9 .48 1.97 4.67 8.93 14.4 21.1 25.9 30.3 35.7 43.4

289 2 41.1 .44 1.42 2.67 5.20 13.3 26.9 35.5 41.8 46.0 49.5

05/22/97 324 1 37.9 .40 1.29 2.35 3.90 8.90 17.0 26.5 38.5 50.7 60.9

328 2 30.7 .34 .80 1.40 2.25 4.50 10.2 15.8 34.9 43.6 50.8

05/28/97 218 1 2.11 .24 .36 .45 .66 1.24 2.87 6.26 12.6 16.7 18.9

219 2 12.5 .38 .88 1.42 2.08 3.53 6.18 8.81 13.7 17.0 20.0

05/29/97 240 1 27.8 .43 .97 1.57 2.54 6.15 15.6 22.6 29.0 33.5 37.8

245 2 55.3 .68 1.92 3.23 5.10 8.94 15.1 23.2 31.4 39.6 46.8

05/29/97 248 1 13.7 .30 .51 .78 1.15 1.96 3.53 5.69 8.99 13.8 18.2

252 2 73.0 .68 1.98 3.50 6.20 12.2 21.9 30.6 49.1 62.9 68.3

05/30/97 268 1 6.25 .29 .47 .71 .99 1.65 2.73 3.76 6.53 10.9 17.5

261 2 3.85 .26 .38 .49 .72 1.16 1.89 3.06 4.94 7.74 15.4

05/30/97 261 1 10.4 .31 .66 1.12 1.81 3.83 11.1 22.3 33.2 35.0 36.5

Table 4 (Con.)

Bedload

Water Traverse Computed particle size (mm) at specific percentages

Date discharge number Discharge D5 D16 D25 D35 D50 D65 D75 D84 D90 D95

cfs t/d

(con.)
42 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

265 2 5.44 .26 .43 .63 .91 1.56 2.56 3.57 5.55 7.50 10.5

05/30/97 310 1 14.8 .30 .56 .86 1.34 2.52 6.43 13.2 24.6 32.6 34.8

316 2 30.7 .37 .91 1.60 2.80 6.77 16.4 24.4 31.7 38.4 44.2

05/31/97 275 1 8.19 .33 .71 1.09 1.68 2.87 4.60 6.86 9.78 12.5 14.8

275 2 7.75 .29 .46 .76 1.25 2.50 4.73 7.26 10.8 13.7 16.0

05/31/97 285 1 13.8 .31 .59 .99 1.69 3.52 9.34 28.3 36.5 39.7 42.3

289 2 12.0 .31 .64 1.06 1.55 2.49 3.76 6.33 10.3 13.9 17.5

05/31/97 328 1 23.0 .31 .66 1.29 2.73 7.49 14.2 20.7 27.6 32.3 36.1

337 2 23.1 .28 .48 .80 1.32 2.45 3.96 6.03 7.94 11.9 15.3

06/01/97 364 1 15.4 .27 .44 .71 1.24 2.71 5.92 11.6 22.8 31.5 38.7

364 2 20.5 .31 .72 1.57 3.11 7.36 17.0 27.8 34.4 37.3 39.6

06/01/97 355 1 14.2 .28 .46 .81 1.53 3.42 7.02 13.5 24.5 32.5 36.2

355 2 19.5 .29 .49 .87 1.52 2.82 4.61 6.65 9.45 13.1 16.3

06/01/97 346 1 13.4 .28 .46 .76 1.41 3.95 10.4 15.9 23.7 29.0 33.4

350 2 11.8 .25 .37 .46 .70 1.52 18.1 24.8 30.8 33.5 35.2

06/04/97 394 1 98.1 .33 .92 1.93 3.72 7.40 13.0 18.4 27.1 33.7 43.4

400 2 71.2 .29 .58 1.26 2.82 6.75 12.9 18.9 27.3 33.4 41.2

06/05/97 353 1 80.6 .33 .79 1.47 2.56 5.20 10.8 17.4 26.8 33.9 43.0

350 2 76.8 .32 .73 1.45 2.80 7.19 18.7 28.9 39.6 47.3 53.6

06/05/97 350 1 109. .34 .83 1.61 3.21 8.45 17.0 24.7 31.6 37.3 42.2

358 2 80.2 .29 .50 .94 1.97 7.47 13.8 20.5 28.7 64.3 65.7

06/05/97 389 1 96.1 .28 .49 .86 1.62 3.84 10.7 20.8 32.8 38.9 43.9

399 2 107. .33 .86 3.60 10.4 17.1 24.5 29.5 38.3 47.9 56.0

06/05/97 413 1 174. .36 .98 2.24 5.79 18.4 31.8 43.0 53.2 60.0 64.9

404 2 94.6 .28 .47 .75 1.19 2.44 5.36 10.6 20.1 28.8 37.3

06/06/97 350 1 56.9 .27 .42 .61 .96 1.85 3.52 6.03 10.2 14.5 20.3

337 2 47.8 .27 .42 .61 .96 2.06 6.04 12.3 21.4 29.1 37.3

06/06/97 328 1 35.3 .26 .38 .48 .76 1.49 3.44 7.55 19.0 34.6 42.8

328 2 82.7 .29 .51 .96 1.83 4.73 11.7 17.6 24.2 28.5 32.4

06/10/97 252 1 45.5 .37 .95 1.79 3.68 10.9 20.8 28.1 34.3 37.9 41.0

259 2 35.9 .32 .70 1.22 2.08 5.18 12.7 26.4 37.3 42.4 46.7

06/11/97 217 1 60.5 .46 1.85 3.86 5.73 8.68 12.5 15.0 20.4 25.7 30.0

217 2 32.4 .35 .87 1.71 3.28 7.75 18.5 25.5 31.8 38.2 43.6

06/11/97 217 1 50.5 .41 .92 1.56 2.64 5.56 10.1 13.9 19.0 24.2 28.6

217 2 57.3 .50 1.60 3.01 5.26 10.5 17.5 23.2 28.3 31.8 35.8

06/11/97 212 1 37.3 .37 .77 1.13 1.63 2.73 4.58 7.40 13.0 22.3 40.0

214 2 73.8 .59 1.35 1.91 2.75 4.15 7.23 11.1 15.7 22.1 27.7

06/12/97 201 1 6.56 .29 .49 .70 .92 1.43 1.99 3.08 4.28 6.60 10.4

198 2 14.0 .36 .75 1.12 1.63 2.84 5.30 8.57 14.0 24.5 33.8

06/12/97 194 1 9.36 .33 .68 .99 1.54 2.90 6.10 10.2 15.6 18.8 21.4

194 2 7.24 .36 .78 1.19 1.77 3.72 12.1 22.9 32.9 34.1 35.0

06/12/97 201 1 7.45 .32 .61 .92 1.63 13.7 35.0 37.6 39.9 41.4 42.7

201 2 13.4 .37 .79 1.20 1.75 3.19 6.21 9.94 14.7 18.1 21.1

06/13/97 180 1 5.05 .30 .54 .83 1.22 1.96 3.63 6.65 11.2 14.7 20.7

180 2 5.90 .33 .64 .98 1.66 3.55 7.89 10.9 13.7 15.5 20.5

06/13/97 174 1 3.45 .30 .51 .79 1.18 2.05 5.03 11.4 18.0 20.2 22.1

174 2 5.91 .38 .76 1.14 1.67 3.33 8.44 14.4 18.0 19.9 21.4

Table 4 (Con.)

Bedload

Water Traverse Computed particle size (mm) at specific percentages

Date discharge number Discharge D5 D16 D25 D35 D50 D65 D75 D84 D90 D95

cfs t/d
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 43

Table 5—Summary of bedload size-distribution data, percentage retained on sieve size, Little Granite Creek, Wyoming, 1982–1993 and 1997.

Water Percentage of Percentage retained on sieve size (mm)

year measured bedload Pan 0.25 0.5 1 2 4 8 16 32 64

1982 1.81 1.1 7.0 7.7 9.0 9.4 10.0 15.2 20.4 20.2 —

1983 1.37 1.6 7.0 7.2 9.5 10.5 11.0 16.4 20.1 16.7 —

1984 2.29 2.7 7.2 6.3 6.4 6.1 6.0 14.2 30.0 21.1 —

1985 .669 4.4 11.2 11.9 16.4 16.7 13.3 10.5 3.6 12.0 —

1986 4.28 1.6 3.8 3.3 4.1 6.1 7.8 14.2 28.4 24.9 5.8

1987 .534 3.0 6.2 12.3 18.8 19.1 19.2 16.1 5.5 — —

1988 .288 6.3 14.5 13.8 15.7 13.7 14.6 13.0 8.4 — —

1989 1.25 2.1 8.7 10.6 14.8 16.1 14.5 11.3 10.0 11.9 —

1990 .023 4.4 13.2 23.7 35.9 18.5 4.3 — — — —

1991 .993 5.5 19.8 21.5 23.5 11.9 8.6 4.2 5.0 — —

1992 .003 9.2 22.5 32.4 23.7 10.7 1.6 — — — —

1993 1.87 2.7 8.6 10.8 14.7 9.6 8.6 9.6 14.3 21.1 —

1997 84.6 2.1 9.0 9.0 10.7 12.0 11.9 14.8 16.9 12.6 1.0

1982–1993 15.4 2.4 7.6 8.2 10.2 9.6 9.5 12.9 20.0 18.0 1.6

1982–1993, 1997 100. 2.1 8.7 8.8 10.6 11.6 11.5 14.6 17.4 13.5 1.1

Table 6—Summary of bedload size-distribution data, percentage finer than sieve size, Little Granite Creek, Wyoming, 1982–1993 and 1997.

Water Percentage of Percentage finer than sieve size (mm)

year measured bedload 0.25 0.5 1 2 4 8 16 32 64 128

1982 1.81 1.1 8.1 15.8 24.8 34.2 44.2 59.4 79.8 100. 100.

1983 1.37 1.6 8.7 15.8 25.4 35.9 46.8 63.2 83.3 100. 100.

1984 2.29 2.7 9.9 16.2 22.6 28.7 34.7 48.9 78.9 100. 100.

1985 .669 4.4 15.6 27.5 43.9 60.6 73.9 84.4 88.0 100. 100.

1986 4.28 1.6 5.4 8.7 12.8 18.9 26.7 40.9 69.3 94.2 100.

1987 .534 3.0 9.1 21.4 40.2 59.3 78.5 94.5 100. 100. 100.

1988 .288 6.3 20.8 34.6 50.3 64.0 78.6 91.6 100. 100. 100.

1989 1.25 2.1 10.8 21.4 36.2 52.3 66.8 78.1 88.1 100. 100.

1990 .023 4.4 17.6 41.3 77.2 95.7 100. 100. 100. 100. 100.

1991 .993 5.5 25.3 46.8 70.3 82.2 90.8 95.0 100. 100. 100.

1992 .003 9.2 31.7 64.0 87.7 98.4 100. 100. 100. 100. 100.

1993 1.87 2.7 11.3 22.1 36.8 46.4 55.0 64.6 78.9 100. 100.

1997 84.6 2.1 11.0 20.0 30.7 42.7 54.6 69.4 86.3 99.0 100.

1982–1993 15.4 2.4 10.0 18.2 28.4 38.0 47.5 60.4 80.4 98.4 100.

1982–1993, 1997 100. 2.1 10.8 19.6 30.2 41.8 53.4 67.9 85.4 98.9 100.

Table 7—Summary of bedload size-distribution data, computed particle size at specific percentages, Little Granite Creek, Wyoming, 1982–

1993 and 1997.

Water Percentage of Computed particle size (mm) at specified percentages

year measured bedload D5 D16 D25 D35 D50 D65 D75 D84 D90 D95

1982 1.81 0.41 1.01 2.03 4.24 10.4 19.0 26.6 33.7 36.8 41.2

1983 1.37 .39 .99 1.93 3.74 9.08 16.9 23.1 32.3 35.4 40.0

1984 2.29 .34 .97 2.66 8.12 16.4 22.6 28.7 34.0 37.1 41.4

1985 .669 .27 .51 .88 1.39 2.57 4.97 8.53 15.7 33.3 38.0

1986 4.28 .48 2.90 6.95 12.2 19.9 28.6 35.7 44.1 53.0 67.1

1987 .534 .34 .76 1.16 1.67 2.85 4.83 6.93 9.58 12.2 16.4

1988 .288 .22 .42 .63 1.01 1.97 4.16 6.62 10.2 14.3 17.9

1989 1.25 .35 .72 1.21 1.90 3.63 7.34 13.1 23.6 33.2 38.0

1990 .023 .26 .47 .64 .85 1.17 1.54 1.90 2.40 2.93 3.80

1991 .993 .24 .39 .50 .70 1.10 1.69 2.57 4.55 7.32 16.0

1992 .003 .19 .33 .43 .54 .74 1.02 1.31 1.74 2.17 2.79

1993 1.87 .33 .70 1.17 1.85 5.35 16.3 26.0 34.0 37.1 41.4

1997 84.6 .33 .78 1.47 2.71 6.46 13.6 21.3 29.8 41.3 54.0

1982–1993 15.4 .35 .84 1.62 3.25 9.14 18.5 25.9 34.6 40.2 48.9

1982–1993, 1997 100. .33 .79 1.51 2.82 6.84 14.4 22.5 30.8 43.0 54.9
44 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

Table 8—Hydraulic geometry measurements at Little Granite Creek.

Used in

hydraulic

Adjusted geometry

Date Discharge Width Area Mean velocity Gage height gage height Depth analysis

ft

3 s–1 ft ft2 ft s–1 - - - - - - - - - - - - - - - ft - - - - - - - - - - - - - - - -

11/17/1981 6.2 20.0 8.5 0.73 0.77 0.77 0.42

12/16/1981 5.7 20.0 7.4 .78 1.40 1.40 .37 *

01/11/1982 4.3 17.0 6.7 .64 1.32 1.32 .39

02/10/1982 7.3 19.0 11.5 .64 1.37 1.37 .61

02/27/1982 354. 22.0 50.9 6.95 3.15 3.14 2.31

03/18/1982 4.1 9.0 4.7 .87 1.40 1.40 .52

04/14/1982 7.8 14.5 7.5 1.05 1.52 1.58 .51 *

05/11/1982 77. 21.0 26.8 2.89 2.30 2.32 1.28

06/02/1982 204. 23.0 38.8 5.25 2.95 3.02 1.69

06/09/1982 165. 21.0 33.2 4.98 2.70 2.77 1.58

06/18/1982 290. 22.0 50.3 5.76 3.37 3.28 2.29

06/24/1982 237. 23.0 47.4 5.00 3.20 3.08 2.06

06/29/1982 215. 23.0 47.7 4.51 2.87 2.86 2.07

07/07/1982 96. 22.0 27.3 3.52 2.50 2.54 1.24

07/13/1982 77.7 23.0 26.9 2.89 2.42 2.45 1.17

08/18/1982 19.4 21.0 13.1 1.48 1.87 1.95 .62 *

09/14/1982 14.1 20.0 11.0 1.28 1.64 1.74 .55

10/20/1982 9.3 20.0 12.0 .78 1.75 1.62 .60

11/17/1982 10.2 18.0 10.4 .98 1.96 1.90 .58 *

12/16/1982 8.1 13.0 7.8 1.05 1.56 1.64 .60 *

01/18/1983 5.6 16.0 13.7 .41 1.75 1.75 .86

02/16/1983 6.1 13.0 5.3 1.14 1.44 1.44 .41 *

03/17/1983 8.3 15.5 7.1 1.18 1.50 1.61 .45 *

04/13/1983 9.1 15.0 6.9 1.31 1.53 1.63 .46 *

05/17/1983 35.6 22.0 17.8 2.00 2.04 2.09 .81 *

06/01/1983 259. 22.0 46.4 5.58 3.03 3.05 2.11

06/08/1983 220. 22.0 41.1 5.34 3.16 3.13 1.87

06/15/1983 163. 22.0 37.3 4.38 2.75 2.77 1.70

06/22/1983 119. 22.0 32.5 3.68 2.64 2.65 1.48

06/29/1983 92.5 21.0 26.7 3.46 2.46 2.51 1.27

07/06/1983 78.1 21.0 25.9 3.02 2.35 2.41 1.23

07/13/1983 55.2 22.0 25.0 2.21 2.15 2.26 1.14

08/24/1983 23.3 22.0 15.3 1.52 1.79 2.00 .70 *

09/13/1983 14.0 20.0 13.2 1.06 1.58 1.59 .66

10/12/1983 18.0 20.0 13.8 1.30 1.69 1.71 .69

11/14/1983 18.5 20.0 12.0 1.54 1.76 1.71 .60 *

12/15/1983 24.3 20.0 17.6 1.39 1.68 1.68 .88

01/26/1984 11.6 14.6 10.5 1.10 1.53 1.53 .72 *

02/15/1984 9.1 14.0 8.6 1.06 1.40 1.40 .61 *

03/14/1984 9.0 15.0 7.1 1.27 1.50 1.44 .47 *

04/18/1984 48.8 22.0 19.8 2.46 2.06 2.16 .90

05/10/1984 49.8 22.0 22.0 2.27 2.06 2.15 1.00

05/17/1984 198. 22.0 37.4 5.28 2.71 2.83 1.70

05/22/1984 166. 32.0 41.4 4.00 2.89 2.87 1.29 *

05/30/1984 253. 22.0 44.7 5.66 3.13 3.12 2.03

06/07/1984 142. 31.5 36.6 3.88 2.82 2.73 1.16 *

06/13/1984 111. 22.0 31.4 3.54 2.64 2.69 1.43

06/21/1984 181. 30.0 41.4 4.38 2.77 2.92 1.38 *

06/28/1984 110. 27.0 27.8 3.95 2.50 2.60 1.03 *

07/06/1984 74.1 22.0 27.3 2.71 2.29 2.35 1.24

07/11/1984 5.7 22.0 24.1 2.18 2.15 1.10

07/18/1984 40.9 22.0 19.4 2.10 2.13 2.16 .88 *

08/15/1984 18.3 21.0 14.7 1.24 1.88 1.86 .70 *

09/11/1984 12.3 19.0 10.8 1.14 1.56 1.56 .57 *

10/24/1984 9.6 18.0 9.7 .99 1.72 1.72 .54 *

11/14/1984 8.2 16.0 10.1 .82 1.44 1.41 .63 *

12/12/1984 6.9 16.0 8.5 .82 1.39 1.35 .53 *

(con.)
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 45

01/08/1985 7.6 15.0 7.3 1.04 1.37 1.37 .49 *

02/13/1985 6.0 12.0 6.8 .88 1.30 1.31 .56 *

03/19/1985 6.7 15.0 7.7 .87 2.01 2.01 .51 *

04/17/1985 78.7 22.0 28.0 2.81 2.39 2.39 1.27

05/08/1985 139. 27.0 32.8 4.24 2.87 2.87 1.21 *

05/15/1985 104. 30.0 32.0 3.26 2.58 2.58 1.07 *

05/22/1985 129. 27.0 31.2 4.14 2.70 2.70 1.16 *

05/30/1985 99.6 29.0 31.0 3.22 2.50 2.50 1.07 *

06/05/1985 68.2 22.0 25.6 2.66 2.33 2.33 1.16

06/13/1985 55.5 26.0 19.5 2.84 2.29 2.29 .75 *

06/19/1985 43.6 22.0 21.6 2.02 2.06 2.06 .98

06/27/1985 27.5 21.0 17.0 1.62 1.96 1.91 .81 *

07/02/1985 24.8 21.0 15.8 1.56 1.95 1.90 .75 *

07/11/1985 23.8 20.0 13.7 1.74 1.86 1.85 .69 *

07/17/1985 14.0 20.0 11.0 1.28 1.74 1.74 .55 *

07/19/1985 17.4 21.5 10.9 1.59 1.72 1.68 .51 *

08/16/1985 7.3 19.0 9.3 .78 1.42 1.37 .49 *

08/21/1985 10.1 21.0 11.3 .89 1.49 1.49 .54 *

10/09/1985 6.1 20.0 9.0 .68 1.40 1.31 .45 *

12/18/1985 4.9 19.4 .0 .62 1.32 1.32 .41 *

02/21/1986 7.0 16.0 .0 .93 1.31 1.31 .47

03/24/1986 25.4 22.0 .0 1.90 1.84 1.84 .61 *

04/16/1986 49.5 23.0 .0 2.09 2.15 2.15 1.03

05/08/1986 81.1 27.0 .0 3.01 2.46 2.46 1.00 *

05/14/1986 71. 22.0 .0 2.83 2.32 2.32 1.14

05/20/1986 130. 27.0 .0 3.67 2.77 2.77 1.31 *

05/28/1986 298. 23.0 .0 5.88 3.22 3.22 2.21

06/03/1986 403. 23.0 .0 6.83 3.38 3.38 2.57

06/12/1986 250. 23.0 .0 4.86 3.11 3.11 2.23

06/18/1986 180. 23.0 .0 3.94 2.81 2.81 1.99

06/26/1986 104. 27.5 .0 3.27 2.60 2.60 1.15 *

07/02/1986 82.8 22.0 .0 3.06 2.46 2.46 1.23

07/10/1986 56.7 28.0 .0 2.34 2.20 2.20 .86

07/16/1986 45.5 23.0 .0 2.22 2.11 2.11 .89 *

08/20/1986 16.6 21.0 13.6 1.22 1.73 1.67 .65 *

10/22/1986 9.3 20.0 11.2 .83 1.54 1.45 .56 *

11/11/1986 6.1 21.0 .0 .63 2.22 2.22 .46

12/11/1986 6.2 25.0 .0 .64 1.36 1.36 .39

12/17/1986 6.1 21.0 9.6 .63 2.22 2.22 .46

02/11/1987 6.2 25.0 9.8 .64 1.36 1.36 .39

04/08/1987 19.6 17.0 13. 1.50 1.77 1.73 .76

05/07/1987 83.5 28.0 27.2 3.07 2.46 2.42 .97 *

05/13/1987 62.0 28.0 22.6 2.75 2.30 2.26 .81 *

05/22/1987 65.7 29.0 22.4 2.94 2.29 2.29 .77 *

05/28/1987 106. 30.0 31.0 3.43 2.50 2.56 1.03 *

06/03/1987 73.3 27.0 25.0 2.94 2.36 2.35 .93 *

06/10/1987 56.6 22.0 24. 2.35 2.25 2.21 1.09

07/15/1987 20.2 26.0 13.6 1.49 1.78 1.74 .52 *

08/19/1987 11.3 21.0 15.2 .74 1.59 1.52 .72 *

10/21/1987 3.3 14.0 6.6 .49 1.40 1.40 .47

11/24/1987 5.3 18.0 7.9 .67 1.54 1.54 .44 *

12/18/1987 10.1 26.0 16.3 .62 1.39 1.39 .63

02/25/1988 4.1 15.0 14.6 .28 2.20 2.20 .97

03/17/1988 4.9 14.5 6.0 .81 1.30 1.30 .41 *

04/06/1988 8.6 14.0 8.3 1.04 1.60 1.60 .59 *

05/04/1988 47.4 28.0 20.8 2.27 2.11 2.11 .74 *

05/12/1988 67.5 22.0 26.7 2.53 2.36 2.30 1.21

Table 8 (Con.)

Used in

hydraulic

Adjusted geometry

Date Discharge Width Area Mean velocity Gage height gage height Depth analysis

ft

3 s–1 ft ft2 ft s–1 - - - - - - - - - - - - - - - ft - - - - - - - - - - - - - - - -

(con.)
46 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

05/18/1988 156. 23.0 36.8 4.24 2.71 2.80 1.60

05/27/1988 129. 22.0 35.6 3.62 2.66 2.68 1.62

06/03/1988 75.1 28.0 24.2 3.10 2.30 2.36 .86 *

06/10/1988 59.0 22.0 28.7 2.06 2.30 2.23 1.30

06/15/1988 47.5 22.0 24.2 1.96 2.14 2.14 1.10

06/22/1988 40.5 21.0 22.2 1.82 2.05 2.05 1.06

07/14/1988 15.4 17.0 11.8 1.30 1.78 1.78 .69 *

07/14/1988 17.6 20.0 10.3 1.70 1.78 1.69 .52 *

08/24/1988 6.9 16.5 8.3 .84 1.50 1.36 .50 *

10/19/1988 5.1 16.5 6.6 .77 1.41 1.26 .40 *

12/14/1988 4.6 16.0 6.9 .67 1.38 1.23 .43 *

02/16/1989 3.2 11.5 6.3 .51 1.48 1.48 .54

03/20/1989 7.3 15.0 8.4 .88 1.52 1.37 .56 *

04/19/1989 68.4 23.0 29.2 2.34 2.33 2.31 1.27

05/05/1989 83.7 22.0 30.1 2.78 2.47 2.42 1.37

05/09/1989 173. 33.0 43.7 3.96 2.83 2.86 1.32 *

05/18/1989 154. 32.0 40.1 3.84 2.78 2.79 1.25 *

05/25/1989 122. 31.0 37.8 3.23 2.75 2.75 1.22 *

05/25/1989 137. 31.0 40.2 3.41 2.75 2.72 1.30 *

06/02/1989 119. 30.0 37.1 3.21 2.75 2.75 1.24 *

06/02/1989 126. 30.0 38.8 3.24 2.75 2.71 1.29 *

06/07/1989 166. 30.0 40.0 4.15 2.88 2.84 1.33 *

06/15/1989 122. 30.0 32.4 3.77 2.68 2.64 1.08 *

06/21/1989 78.4 30.0 26.8 2.93 2.48 2.38 .89 *

06/29/1989 52.2 29.0 23.1 2.26 2.24 2.17 .80 *

07/05/1989 44.8 28.0 21.4 2.09 2.16 2.10 .76 *

07/13/1989 36.3 22.0 18.8 1.93 2.05 1.99 .85 *

08/23/1989 12.3 20.0 10.8 1.14 1.64 1.55 .54 *

10/26/1989 6.3 22.0 8.7 .72 1.46 1.46 .39

12/13/1989 5.3 19.0 9.9 .53 1.46 1.46 .52 *

02/14/1990 4.3 17.0 10.9 .39 1.57 1.57 .64

03/21/1990 6.2 17.0 6.8 .91 1.49 1.49 .40 *

04/17/1990 43.5 24.0 20.0 2.18 2.07 2.17 .83 *

04/27/1990 52.7 28.0 22.5 2.34 2.13 2.25 .80 *

05/03/1990 44.6 24.0 20.2 2.21 2.13 2.18 .84 *

05/10/1990 68.3 28.0 26.8 2.55 2.32 2.37 .96 *

05/18/1990 57.2 28.0 22.6 2.53 2.21 2.29 .81 *

05/25/1990 72.3 30.0 27.2 2.66 2.38 2.38 .91 *

05/31/1990 79.6 30.0 31.0 2.57 2.48 2.43 1.03 *

05/31/1990 75.2 30.0 29.4 2.56 2.48 2.43 .98 *

05/31/1990 75.6 28.0 23.7 3.19 2.48 2.43 .85 *

06/05/1990 72.5 30.0 26.2 2.77 2.47 2.42 .87 *

06/14/1990 62.9 28.0 26.0 2.42 2.32 2.32 .93 *

06/20/1990 61.3 28.0 25.3 2.42 2.30 2.30 .90 *

06/02/1990 51.9 27.0 24.2 2.14 2.13 2.15 .90 *

07/05/1990 34.4 26.0 19.2 1.79 2.02 2.06 .74 *

07/20/1990 20.1 20.0 15.1 1.34 1.84 1.84 .76 *

08/20/1990 10.4 17.0 10.3 1.00 1.62 1.62 .61 *

10/24/1990 8.9 22.0 11.3 .79 1.54 1.57 .51 *

12/13/1990 4.1 17.0 9.6 .43 1.67 1.67 .56

02/14/1991 4.9 14.0 5.7 .85 1.37 1.39 .41 *

04/18/1991 12.1 22.0 10.7 1.13 1.64 1.67 .49 *

05/23/1991 140. 30.0 35.8 3.91 2.77 2.77 1.19 *

05/29/1991 100. 30.0 28.3 3.54 2.55 2.55 .94 *

05/29/1991 93.8 30.0 31.0 3.02 2.52 2.52 1.03 *

05/29/1991 93.6 30.0 31.9 2.93 2.53 2.53 1.06 *

06/01/1991 85.9 29.8 31.6 2.72 2.48 2.48 1.06 *

06/01/1991 85.7 29.8 31.4 2.73 2.50 2.50 1.05 *

Table 8 (Con.)

Used in

hydraulic

Adjusted geometry

Date Discharge Width Area Mean velocity Gage height gage height Depth analysis

ft

3 s–1 ft ft2 ft s–1 - - - - - - - - - - - - - - - ft - - - - - - - - - - - - - - - -

(con.)
USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002 47

06/01/1991 87.5 30.0 33.0 2.65 2.53 2.53 1.10 *

06/03/1991 111. 30.8 40.9 2.72 2.66 2.66 1.33 *

06/03/1991 149. 30.8 40.8 3.66 2.79 2.79 1.32 *

06/03/1991 140. 31.2 42.2 3.32 2.83 2.83 1.35 *

06/04/1991 188. 31.6 44.2 4.24 2.83 2.83 1.40 *

06/04/1991 190. 31.6 43.3 4.40 2.85 2.85 1.37 *

06/11/1991 143. 30.6 37.4 3.83 2.75 2.75 1.22 *

06/11/1991 144. 30.6 38.3 3.76 2.76 2.76 1.25 *

06/11/1991 158. 30.8 39.8 3.96 2.79 2.79 1.29 *

06/12/1991 150. 30.6 38.5 3.89 2.78 2.78 1.26 *

06/12/1991 139. 30.6 38.3 3.64 2.76 2.76 1.25 *

06/12/1991 148. 30.6 38.2 3.88 2.77 2.77 1.25 *

06/12/1991 154. 30.6 39.8 3.88 2.77 2.77 1.30 *

06/12/1991 159. 30.8 41.3 3.84 2.80 2.80 1.34 *

06/12/1991 166. 31.0 41.6 3.99 2.82 2.82 1.34 *

06/13/1991 156. 30.8 39.5 3.94 2.77 2.77 1.28 *

06/13/1991 152. 30.8 40.4 3.76 2.77 2.77 1.31 *

06/13/1991 146. 30.6 39.2 3.73 2.77 2.77 1.28 *

07/16/1991 27.8 26.0 21.7 1.28 1.93 1.98 .83 *

08/28/1991 13.9 17.0 11.8 1.18 1.72 1.72 .69 *

10/23/1991 6.8 17.0 8.9 .76 1.50 1.50 .52 *

12/19/1991 4.1 17.0 8.4 .49 1.57 1.57 .49

02/12/1992 3.9 12.5 5.1 .76 1.42 1.42 .41 *

04/15/1992 26.4 25.0 19.2 1.38 1.88 1.96 .77 *

05/21/1992 58.9 29.0 30.0 1.96 2.20 2.30 1.03 *

06/05/1992 25.7 25.6 16.8 1.52 1.96 1.96 .66 *

06/06/1992 25.1 25.6 16.4 1.53 1.96 1.94 .64 *

06/07/1992 25.0 25.3 16.5 1.52 1.95 1.95 .65 *

06/08/1992 25.4 25.3 16.8 1.51 1.95 1.95 .66 *

06/15/1992 27.2 25.0 21.2 1.28 1.89 1.97 .85 *

08/26/1992 7.6 19.0 8.8 .87 1.49 1.52 .46 *

10/05/1992 5.1 19.0 8.7 .59 1.46 1.40 .46 *

05/21/1997 288. 32.8 54.3 5.32 3.35 — 1.66 *

05/22/1997 321. 32.8 58.1 5.61 3.38 — 1.77 *

05/28/1997 220. 30.2 48.1 4.59 3.08 — 1.59 *

05/29/1997 245. 30.5 49.2 5.32 3.15 — 1.61 *

05/29/1997 250. 30.8 50.6 4.95 3.23 — 1.64 *

05/30/1997 249. 31.5 50.2 4.95 3.23 — 1.59 *

05/30/1997 268. 31.5 51.7 5.54 3.28 — 1.64 *

05/30/1997 316. 32.2 55.2 5.71 3.36 — 1.72 *

05/31/1997 279. 31.8 53.4 5.22 3.30 — 1.68 *

06/01/1997 363. 34.4 62.1 5.87 3.50 — 1.80 *

06/04/1997 400. 35.1 66.5 6.04 3.60 — 1.89 *

06/12/1997 195. 28.9 37.6 5.18 2.97 — 1.30 *

06/13/1997 173. 28.2 36.0 4.79 2.88 — 1.28 *

07/29/1997 36.6 23.3 15.1 2.43 2.00 — .65 *

Table 8 (Con.)

Used in

hydraulic

Adjusted geometry

Date Discharge Width Area Mean velocity Gage height gage height Depth analysis

ft

3 s–1 ft ft2 ft s–1 - - - - - - - - - - - - - - - ft - - - - - - - - - - - - - - - -
48 USDA Forest Service Gen. Tech. Rep. RMRS-GTR-90. 2002

Table 9—Channel surface and subsurface particle-size distribution, computed particle size at specific percentages, Little Granite Creek, Wyoming.

Type of Surface or Year Computed particle size (mm) at specific percentages

sample subsurface collected D5 D16 D25 D35 D50 D65 D75 D84 D90 D95

Pebble count Surface 1994 1.0 10. 21. 32. 55 85 118 140 175 235

Pebble count Surface 1997 25. 48. 65. 78. 99 155 180 220 270 295

Pebble count Surface 2000 2.0 24. 39. 56. 89 134 173 208 250 325

Barrel sample #1 Surface 2000 19. 28. 29. 31. 38 53 65 78 90 115

Barrel sample #2 Surface 2000 23. 28. 30. 33. 39 46 53 62 65 75

Barrel sample #3 Surface 2000 23. 36. 40. 42. 46 58 64 69 71 84

Barrel sample #4 Surface 2000 12. 30. 35. 43. 67 75 79 89 120 135

Barrel sample #5 Surface 2000 17. 25. 27. 31. 35 39 45 56 74 110

Barrel sample #6 Surface 2000 22. 32. 35. 40. 52 67 78 88 98 171

Barrel sample #1 Subsurface 2000 .9 2.8 5.2 9.5 17 24 31 39 45 57

Barrel sample #2 Subsurface 2000 .9 2.5 5.0 9.5 18 29 39 48 55 62

Barrel sample #3 Subsurface 2000 .9 2.9 5.7 10.1 19 30 39 47 57 67

Barrel sample #4 Subsurface 2000 .9 2.8 6.3 12. 21 34 42 52 59 65

Barrel sample #5 Subsurface 2000 .6 2.2 3.8 5.9 10 15 20 25 31 37

Barrel sample #6 Subsurface 2000 1.0 3.9 8.1 13.1 20 27 34 41 46 56
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ROCKY MOUNTAIN RESEARCH STATION

RMRS

The Rocky Mountain Research Station develops scientific information and technology to improve management, protection, and use of

the forests and rangelands. Research is designed to meet the needs

of National Forest managers, Federal and State agencies, public and

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Studies accelerate solutions to problems involving ecosystems,

range, forests, water, recreation, fire, resource inventory, land reclamation, community sustainability, forest engineering technology,

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Research Locations

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