KEITH SEBELIIJS

2000 LAKE SURVEY

FOR

______

REOIJ - .

RE

U.S. Department of the Interior

Bureau of Reclamation
REPORT DOCUMENTATION PAGE

Form Approved

0MB No. 0704-0188

I. AGENCY USE ONLY (Leave Blank) 2. REPORT DATE 3. REPORT TYPE AND DATES COVERED

September 2001 Final

_______________________________

4. TITLE AND SUBTITLE 5. FUNDING NUMBERS

Keith Sebelius PR

2000 Lake Survey

6. AUTHOR(S)

Ronald L. Ferrari _______________________

7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORJ4]NG ORGANIZATION

REPORT N1JMBER

Bureau of Reclamation, Technical Service Center, Denver CO 80225-0007 ____________________________

9. SPONSORING/MONiTORING AGENCY NAME(S) AN]) ADDRESS(ES) 10. SPONSORING/MONITORING

AGENCY REPORT NuMBER

Bureau ofReclamation Denver Federal Center, P0 Box 25007, ,

Denver CO 80225-0007

DIBR

_____________________________

11. SUPPLEMENTARY NOTES

Hard copy available at Bureau ofReclamation Technical Service Center, Denver, Colorado

12a. DISTRIBUTION/AVAIIABIL1TY STATEMENT 12b. DISTRIBUTION CODE

13. ABSTRACT (Mzximum 200 words)

The Bureau of Reclamation (Reclamation) surveyed Keith Sebelius Lake (formerly Norton Reservoir) in July and September of

2000 to develop a topographic map and compute a present storage-elevation relationship (area-capacity tables). The data were

used to calculate reservoir capacity lost due to sediment accumulation since dam closure in October of 1964. The underwater

survey was conducted in the main part of the reservoir in July of 2000 and the upper portion of the reservoir in September of 2000.

The surveys were conducted near reservoir elevation 2300 feet (project datum). The underwater survey used sonic depth

recording equipment interfaced with a global positioning system (GPS) that gave continuous sounding positions throughout the

underwater portions of the reservoir covered by the survey vessel. The above-water topography was determined by digitizing the

developed contour lines from the U.S. Geological Survey quadrangle (USGS quad) maps of the reservoir area. The new

topographic map of Keith Sebelius Lake was developed from the combined 2000 underwater measured topography and the

digitized USGS contours and assumed no change above elevation 2,300.0.

As of September 2000, at top of conservation water surface elevation (feet) 2,304.3, the surface area was 2,181 acres with a total

capacity of 34,510 acre-feet. Since initial filling in October of 1964, about 1,617 acre-feet of sediment have accumulated in Keith

Sebelius Lake below elevation 2,304.3, resulting in a 4.48 percent loss in reservoir volume. Since 1964, the estimated average

annual rate of reservoir capacity lost to sediment accumulation is 44.9 acre-feet.

14. SUBJECTTERMS 15. NUMBER OF PAGES

reservoir area and capacity! sedimentationl reservoir surveys! sonar! sediment distributionl _____________________

contour area! reservoir area! sedimentation survey! global positioning system 16. PRICE CODE

17. SECURITY 18. SECURITY 19. SECURITY CLASSIFICATION 20. LIMiTATION OF

CLASSIFICATION CLASSIFICATION OF ABSTRACT ABSTRACT

OF REPORT OF THIS PAGE

UL

Tm UL

NSN 7540-01-280-5500 Standard Form 298 (Rev. 2-89)

Prescribed by ANSI Std. 239-18

298-102
Keith Sebelius Lake

2000 RESERVOIR SURVEY

by

Ronald U. Ferrari

Sedimentation and River Hydraulics Group

Water Resources Services

Technical Service Center

Denver, Colorado

August 2001
ACKNOWLEDGMENTS

The Bureau of Reclamation's (Reclamation) Sedimentation and River

Hydraulics Group of the Technical Service Center (TSC) prepared and

published this report. Jennifer Bountiy, Kent Collins and Ronald Ferrari of

the TSC conducted the hydrographic survey. Ronald Ferrari completed the

data processing needed to generate the new topographic map and areacapacity tables. Sharon Nuanes of the TSC completed the final map

development. Kent Collins of TSC performed the technical peer review of

this documentation.

Mission Statements

The mission of the Department of the Interior is to protect and provide

access to our Nation's natural and cultural heritage and honor our trust

responsibilities to tribes.

The mission of the Bureau of Reclamation is to manage, develop, and

protect water and related resources in an environmentally and economically

sound manner in the interest of the American public.

The information contained in this report regarding commercial products or

firms may not be used for advertising or promotional purposes and is not

to be construed as an endorsement of any product or firm by Reclamation.

The information contained in this report was developed for the Bureau of

Reclamation; no warranty as to the accuracy, usefulness, or completeness

is expressed or implied.

11
CONTENTS

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Page

Introduction

Summaiy and Conclusions

Reservoir Operations 2

Hydrographic Survey Equipment and Method 3

GPS Technology and Equipment 3

Survey Method and Equipment 5

Keith Sebelius Lake Datums 5

Reservoir Area and Capacity 6

Topography Development 6

Development of 2000 Contour Areas 7

2000 Storage Capacity 7

Reservoir Sediment Analyses 8

References 9

TABLES

Table

1 Reservoir sediment data summaiy (page 1 of 2) 10

1 Reservoir sediment data summary (page 2 of 2) 11

2 Summary of 1999 survey results 12

FIGURES

Figure

1 Keith Sebelius Lake location map 13

2 Norton Dam, plan and section 14

3 Keith Sebelius Lake topographic map, No. 492-D-365 15

4 Keith Sebelius Lake topographic map, No. 492-D-366 17

5 Keith Sebelius Lake topographic map, No. 492-D-367 19

6 Keith Sebelius Lake topographic map, No. 492-D-368 21

7 Keith Sebelius Lake topographic map, No. 492-D-369 23

8 2000 area and capacity curves 25

111

INTRODUCTION

Keith Sebelius Lake and Norton Dam are located in Norton County on Prairie Dog Creek about 2.5

miles upstream of Norton, Kansas (fig. 1). Keith Sebelius Lake (formerly Norton Reservoir) is part

of the Almena Unit of the Missouri River Basin development that was designed to provide irrigation,

municipal and industrial water, flood control, and recreation benefits. The dam and reservoir are

operated and maintained by the Bureau of Reclamation.

Norton Dam was completed in December of 1964 and is a zoned rolled earthfill structure whose

dimensions are (fig. 2):

Hydraulic height1 84.4 feet2 Structural height 131 feet

Top width 30 feet Crest length 6,450 feet

Crest elevation 2,347.0 feet

The spiliway is located on the right abutment of the dam and is a gated overflow concrete structure

with three 30.0- by 36.35-foot radial gates, a concrete-lined discharge channel, and stilling basin.

The spiliway crest elevation is 2,296.0. The capacity of the spillway is 94,600 cubic feet per second

(cfs) at reservoir elevation 2,341.0.

The outlet works consist of a drop-inlet type intake structure with two high-pressure gates. The

outlet works stilling basin is designed for a maximum discharge of 330 cfs at the maximum water

surface elevation of 2,341.

The total drainage area above Norton Dam is 683 square miles as listed by the USGS Water

Resources Data Book. Keith Sebelius Lake has an average width of 0.5 miles with a length of

around 6.5 miles.

SUMMARY AND CONCLUSIONS

This Reclamation report presents the 2000 results of the survey of Keith Sebelius Lake. The primary

objectives of the survey were to gather data needed to:

• develop reservoir topography

• compute area-capacity relationships

• estimate storage depletion caused by sediment deposition since dam closure

The definition of such terms as hydraulic height, structural height, etc. may be found in manuals such

as Reclamation's Design of Small Dams and Guide for Preparation of Standing Operating Procedures for Dams and

Reservoirs, or ASCE's Nomenclature for Hydraulics.

2Elevation levels are shown in feet. All elevations shown in this report are based on the original project

datum established by U.S. Bureau of Reclamation which is tied to the National Geodetic Vertical Datum of 1929.

1
The underwater survey was conducted in July and September of 2000 near reservoir water surface

elevation 2,300. The bathymetric survey was run using sonic depth recording equipment, interfaced

with a differential global positioning system (DGPS), capable of determining sounding locations

within the reservoir. The system continuously recorded depth and horizontal coordinates of the

survey boat as it was navigated along grid lines covering Keith Sebelius Lake. The positioning

system provided information to allow the boat operator to maintain a course along these grid lines.

Water surface elevations recorded by the reservoir gauge (tied to the Reclamation vertical datum)

during the time of collection were used to convert the sonic depth measurements to true reservoir

bottom elevations. The above-water topography was determined by digitizing the developed contour

lines from the U.S. Geological Survey quadrangle (USGS quad) maps of the reservoir area.

The new Keith Sebelius Lake topographic maps are a combination of the USGS quad contours and

underwater survey data. The 2000 reservoir surface areas at predetermined contour intervals were

generated by a computer graphics program using the collected reservoir data. The 2000 area and

capacity tables were produced by a computer program that uses measured contour surface areas and

a curve-fitting technique to compute area and capacity at prescribed elevation increments (Bureau

of Reclamation, 1985).

Tables 1 and 2 contain a summary of the Keith Sebelius Lake sedimentation and watershed

characteristics for the 2000 survey. The 2000 survey determined that the reservoir has a total storage

capacity of 34,510 acre-feet and a surface area of 2,181 acres at reservoir elevation 2,304.3. Since

closure in October of 1964, the reservoir had an estimated volume change of 1,617 acre-feet below

reservoir elevation 2,304.3. This volume represents a 4.5 percent loss in total capacity and an

average annual loss of 44.9 acre-feet per year.

RESERVOIR OPERATIONS

Norton Dam operates as part of the Almena Project to provide flood control, irrigation water, and

recreational use. The September 2000 area-capacity tables show 192,027 acre-feet of total storage

below the maximum water surface elevation 2,341.0. The 2000 survey measured a minimum

elevation of 2,261. The following values are from the September 2000 area-capacity tables:

• 58,287 acre-feet of surcharge between elevation 2,331.4 and 2,341.0.

• 99,230 acre-feet of flood control storage between elevation 2,304.3 and 2,331.4.

• 30,517 acre-feet of conservation use between elevation 2,280.4 and 2,304.3.

• 2,357 acre-feet of inactive storage between elevation 2,275.0 and 2,280.4.

• 1,636 acre-feet of dead storage below elevation 2,275.0.

•

The Keith Sebelius Lake inflow and end-of-month stage records in table 1, operation period October

1964 through September 2000, show the computed inflow and annual fluctuation since dam closure.

Inflow values for water years 1997 through 2000 were not available. The estimated average inflow

into the reservoir for this operation period was 17,100 acre-feet per year. Since initial filling in

1967, the extreme storage fluctuations of Keith Sebelius Lake ranged from an elevation of 2,275.8

in 1981 to the maximum recorded elevation of 2,306.5 in 1997.

2
HYDROGRAPHIC SURVEY EQUIPMENT AND METHOD

The hydrographic survey equipment was mounted in the cabin of a 24-foot trihull aluminum vessel

equipped with twin in-board motors. The hydrographic system contained on the survey vessel

consisted of a GPS receiver with a built-in radio and an omnidirectional antenna, a depth sounder,

a helmsman display for navigation, a computer, and hydrographic system software for collecting

underwater data. Power to the equipment was supplied by an on-board generator.

The shore equipment included a second GPS receiver with an external radio and an omnidirectional

antenna. The GPS receiver and antenna were mounted on a survey tripod over a known datum point.

To obtain the maximum radio transmission range, known datum points with clear line-of-sight to

the survey boat were selected. The power for the shore unit was provided by a 12-volt battery.

GPS Technology and Equipment

The hydrographic positioning system used at Keith Sebelius Lake was Navigation Satellite Timing

and Ranging (NAVSTAR) GPS, an all-weather, radio-based, satellite navigation system that enables

users to accurately determine three-dimensional position. The NAVSTAR system's primary mission

is to provide passive global positioning and navigation for land-, air-, and sea-based strategic and

tactical forces and is operated and maintained by the Department of Defense (DOD). The GPS

receiver measures the distances between the satellites and itself and determines the receiver's

position from intersections of the multiple-range vectors. Distances are determined by accurately

measuring the time a signal pulse takes to travel from the satellite to the receiver.

The NAVSTAR system consists of three segments:

• The space segment is a network of 24 satellites maintained in a precise orbit about 10,900

nautical miles above the earth, each completing an orbit every 12 hours.

• The ground control segment tracks the satellites, determining their precise orbits. Periodically,

the ground control segment transmits correction and other system data to all the satellites, and

the data are then retransmitted to the user segment.

• The user segment includes the GPS receivers which measure the broadcasts from the satellites

and calculate the position of the receivers.

The GPS receivers use the satellites as reference points for triangulating their position on earth. The

position is calculated from distance measurements to the satellites that are determined by how long

a radio signal takes to reach the receiver from the satellite. To calculate the receiver's position on

earth, the satellite distance and the satellite's position in space are needed. The satellites transmit

signals to the GPS receivers for distance measurements along with the data messages about their

exact orbital location and operational status. The satellites transmit two "L" band frequencies (called

LI and L2) for the distance measurement signal. At least four satellite observations are required to

mathematically solve for the four unknown receiver parameters (latitude, longitude, altitude, and

3
time); the time unknown is caused by the clock error between the expensive satellite atomic clocks

and the imperfect clocks in the GPS receivers.

The GPS receiver's absolute position is not as accurate as it appears in theory because of the function

of range measurement precision and the geometric position of the satellites. Precision is affected

by several factors--time, because of the clock differences, and atmospheric delays caused by the

effect of the ionosphere on the radio signal. Geometric dilution of precision (GDOP) describes the

geometrical uncertainty and is a function of the relative geometry of the satellites and the user.

Generally, the closer together in angle two satellites are from the receiver, the greater the GDOP.

GDOP is broken into components: position dilution of precision (x,y,z) (PDOP), and horizontal

dilution of precision (x,y) (HDOP). The components are based only on the geometry of the

satellites. The PDOP and 1-IIDOP were monitored at the survey vessel's GPS receiver during the

Keith Sebelius Lake Survey, and for the majority of the time they were less than 3, which is within

the acceptable limits of horizontal accuracy for Class I and 2 level surveys (Corps of Engineers,

1994).

An additional and larger error source in GPS collection is caused by false signal projection, called

selective availability (S/A). The DOD implements S/A to discourage the use of the satellite system

as a guidance tool by hostile forces. Positions determined by a single receiver when S/A is active

can have errors of up to 100 meters. In May of 2000 the use of S/A was discontinued, but the errors

of a single receiver are still around ±10 meters.

A method of collection to resolve or cancel the inherent errors of GPS is called differential GPS

(DGPS). DGPS is used during the reservoir survey to determine positions of the moving survey

vessel in real time. DGPS determines the position of one receiver in reference to another and is a

method of increasing position accuracies by eliminating or minimizing the uncertainties.

Differential positioning is not concerned with the absolute position of each unit but with the relative

difference between the positions of two units, which are simultaneously observing the same

satellites. The inherent errors are mostly canceled because the satellite transmission is essentially

the same at both receivers.

At a known geographical benchmark, one GPS receiver is programmed with the known coordinates

and stationed over the geographical benchmark. This receiver, known as the master or reference

unit, remains over the known benchmark, monitors the movement of the satellites, and calculates

its apparent geographical position by direct reception from the satellites. The inherent errors in the

satellite position are determined relative to the master receiver's programmed position, and the

necessary corrections or differences are transmitted to the mobile GPS receiver on the survey vessel.

For the Keith Sebelius Lake survey, position corrections were determined by the master receiver and

transmitted via an ultra-high frequency (UHF) radio link every second to the survey vessel mobile

receiver. The survey vessel's GPS receiver used the corrections along with the satellite information

it received to determine the vessel's differential location. Using DGPS can result in sub-meter

positional accuracies for the survey vessel.

4
The Sedimentation and River Hydraulics Group conducts their bathymetric surveys using Real-time

Kinematic (RTK) GPS. The major benefit of RTK versus DGPS is that precise heights can be

measured in real time for monitoring water surface elevation changes. The basic outputs from an

RTK receiver are precise 3D coordinates in latitude, longitude, and height with accuracies on the

order of 2 centimeters horizontally and 3 centimeters vertically. The output is on the GPS datum

of WGS-84 which the hydrographic collection software converted into the Kansas's NAD83 state

plane north coordinate system. The system employs two receivers, like with DGPS, that collect

additional satellite data which allows on-the-fly centimeter accuracy measurements.

Survey Method and Equipment

The Keith Sebelius Lake hydrographic survey collection was conducted in July and September of

2000 near water surface elevation 2,300 (Reclamation project datum). The bathymetric survey was

run using sonic depth recording equipment, interfaced with a RTK GPS, capable of determining

sounding locations within the reservoir. The survey system software continuously recorded reservoir

depths and horizontal coordinates as the survey boat moved across close-spaced grid lines covering

the reservoir area. Most of the transects (grid lines) were run somewhat in a north or south direction

of the reservoir at a 300-foot spacing. Data was also collected along the shore as the boat traversed

between transects. The survey vessel's guidance system gave directions to the boat operator to assist

in maintaining the course along these predetermined lines. During each run, the depth and position

data were recorded on the notebook computer hard drive for subsequent processing.

The 2000 underwater data were collected by a depth sounder that was calibrated by lowering a

deflector plate below the boat by cables with known depths marked by beads. The depth sounder

was calibrated by adjusting the speed of sound, which can vary with density, salinity, temperature,

turbidity, and other conditions. The collected data were digitally transmitted to the computer

collection system via a RS-232 port. The depth sounder also produces an analog hard-copy chart

of the measured depths. These graphed analog charts were printed for all survey lines as the data

were collected and recorded by the computer. The charts were analyzed during post-processing, and

when the analog charted depths indicated a difference from the recorded computer bottom depths,

the computer data files were modified. The water surface elevations at the dam, recorded by a

Reclamation gauge were used to convert the sonic depth measurements to true lake-bottom

elevations.

Keith Sebelius Lake Datums

Prior to the underwater survey in September 2000, a RTK GPS survey was conducted to establish

a temporary horizontal and vertical control point that overlooked Keith Sebelius Lake. The

horizontal control was established in Kansas state plane north coordinates in the North American

Datum of 1983 (NAD83). The GPS control was conducted with the base set on the NGS datum

point "NORTONPORT 2" located at the Norton Municipal Airport. All vertical information in this

report was referenced to the reservoir water sur gauge measurements during the time of this

survey. Gauge measurements are referenced to tn teclamation project datum which is tied to the

NGVD29.

5
RESERVOIR AREA AND CAPACITY

Topography Development

The topography of Keith Sebelius Lake was developed from the 2000 collected underwater data and

from the USGS quad maps. The upper contours of Keith Sebelius Lake were developed by

digitizing the contour lines of elevation 2,280.0, 2,290.0, 2,300.0, 2,304.0, 2,310.0, 2,320 and 2,331

from the USGS quad maps that covered the Keith Sebelius Lake area. The USGS quad maps were

developed from aerial photography dated 1974, but the underwater contours of Keith Sebelius Lake

were imported from aU.S. Bureau of Reclamation map dated 1956. ARC/INFO V7.0.2 geographic

information system software was used to digitize the USGS quad contours. The digitized contours

were transformed to Kansas's NAD 1983 north state plane coordinates using the ARC/INFO

PROJECT command.

The elevation 2,300.0 contour digitized from USGS quad maps was used to perform a clip of the

Keith Sebelius Lake TIN such that interpolation was not allowed to occur outside of the 2,300.0

contour. This complete contour was selected since it was the closest elevation to enclose the 2000

underwater data that was collected near reservoir elevation 2,300. This clip was performed using

the hardclip option of the ARC/INFO CREATET1N command. Using ARCEDIT, the underwater

collected data and the digitized contours from the USGS quad maps were plotted. The plot found

that the underwater data completely lied within the elevation 2,300.0 clip.

For developing the 2000 Keith Sebelius contour map and calculating the surface areas there was a

need for data in the underwater reservoir areas not surveyed in 2000. Using ARCEDIT, the digitized

USGS quad contours and the 2000 underwater collected data layers were overlaid or plotted onscreen. The 2,290 contour was chosen as a pattern to add some data points to the underwater data

set. This was needed due to thick tree growth around the reservoir which did not allow survey boat

access near the shoreline, shallow water areas in the main body, and many of the coves and inlets

of the reservoir. In some areas the growth was so thick the survey vessel ended the collection in 10

to 20 feet of water.

Contours for the reservoir below elevation 2,300.0 were computed from the underwater data set

using the triangular irregular network (TIN) surface modeling package within ARC/INFO. A TiN

is a set of adjacent, non-overlapping triangles computed from irregularly spaced points with x,y

coordinates and z values. TIN was designed to deal with continuous data such as elevations. The

TIN software uses a method known as Delaunay's criteria for triangulation where triangles are

formed among all data points within the polygon clip. The method requires that a circle drawn

through the three nodes of a triangle will contain no other point, meaning that sample points are

connected to their nearest neighbors to form triangles using all collected data. This method

preserves all collected survey points. Elevation contours are then interpolated along the triangle

elements. The TIN method is discussed in greater detail in the ARC/INFO V7.0.2 Users

Documentation, (ESRI, 1992).

The linear interpolation option of the ARC/iNFO TINCONTOUR command was used to interpolate

contours from the Keith Sebelius Lake TIN. In addition, the contours were generalized by

6
eliminating certain vertices along the contours. This generalization process improved the

presentability of the resulting contours by removing very small variations in the contour lines. This

generalization had no bearing on the computation of surface areas and volumes for Keith Sebelius

Lake since the areas were calculated from the developed TIN. The areas of the enclosed contour

polygons developed from the survey data were completed for elevations 2,261 through elevation

2,300.0.

The contour topography at 5-foot intervals is presented on figures 3 through 7, drawing numbers

492-D-365 through 492-D-369.

Development of 2000 Contour Areas

The 2000 contour surface areas for Keith Sebelius Lake were computed at 1-foot increments, from

elevation 2,262 to 2,290, using the Keith Sebelius Lake TIN discussed above. The 2000 survey

measured the minimum reservoir as elevation 2,261 feet. These calculations were perfonned using

the ARC/INFO VOLUME command. This command computes areas at user specified elevations

directly from the TIN and takes into consideration all regions of equal elevation. As discussed in

the survey method and equipment section there were large areas of the underwater portion of the

reservoir not surveyed due to the thick tree growth. This accounts for the fact that the 2000 areas

were only computed for elevation 2,290 and below. Due to the lack of 2000 survey data in the treecovered areas, the final 2000 area computations assumed no change in the original measured surface

area from elevation 2,300.0 and above.

2000 Storage Capacity

The storage-elevation relationships based on the measured surface areas were developed using the

area-capacity computer program ACAP85 (Bureau of Reclamation, 1985). Computed surface areas

from the developed TIN, at 2-foot contour intervals, from reservoir elevation 2,262 to elevation

2,290 were used as the control parameters for computing the Keith Sebelius Lake capacity. Since

this study did not collect any above water data the original areas from elevation 2,300.0 and above

were used to complete the table. The program can compute an area and capacity at elevation

increments 0.01- to 1.0-foot by linear interpolation between the given contour surface areas. The

program begins by testing the initial capacity equation over successive intervals to ensure that the

equation fits within an allowable error limit. The error limit was set at 0.00000 1 for Keith Sebelius

Lake. The capacity equation is then used over the full range of intervals fitting within this allowable

error limit. For the first interval at which the initial allowable error limit is exceeded, a new capacity

equation (integrated from basic area curve over that interval) is utilized until it exceeds the error

limit. Thus, the capacity curve is defined by a series of curves, each fitting a certain region of data.

Final area equations are derived by differentiating the capacity equations, which are of second order

polynomial form:

7
y = a1 + a2x + a3x2

where: y = capacity

x = elevation above a reference base

a1 = intercept

a-, and a3 coefficients

Results of the 2000 Keith Sebelius Lake area and capacity computations are listed in table 1 and

columns 4 and 5 of table 2. On table 2, columns 2 and 3 list the original surface areas and

recomputed capacities. A separate set of 2000 area and capacity tables has been published for the

001, 0.1 and 1-foot elevation increments (Bureau of Reclamation 2000). A description of the

computations and coefficients output from the ACAP85 program is included with these tables. Both

the original and 2000 area-capacity curves are plotted on figure 8. As of September 2000, at

maximum reservoir water surfaëe elevation 2,341.0, the surface area was 6,713 acres with a total

capacity of 192,027 acre-feet.

RESERVOIR SEDIMENT ANALYSES

Figure 8 is a plot of Keith Sebelius Lake's original area data versus the 2000 measured areas. This

illustrates the difference between the original and the 2000 measured surface areas. Since Norton

Dam closure in October 1964, the measured total volume change at reservoir elevation 2,304.3 was

estimated to be 1,617 acre-feet. The estimated average annual rate of capacity lost for this time

period (36.0 years) was 44.9 acre-feet per year. The storage loss in terms of percent of original

storage capacity was 4.48 percent. Tables 1 and 2 contain the Keith Sebelius Lake sediment

accumulation and water storage data based on the 2000 resurvey.

It must be noted that the 2000 area and capacity table were generated using measured surface areas

from elevation 2,290 and below. The original surface areas from elevation 2,300 and above were

used to complete the new area and capacity table. This assumed no surface area change from

elevation 2,300 and above which in all probability is not the case. The only means to measure this

would be to conduct an aerial survey. The maximum water surface elevation since 1964 was 2,306.5

and the majority of the years the reservoir has operated at a much lower elevation than this, therefore

any change above elevation 2300 due to sediment accumulation is probably minimal. A resurvey

of Keith Sebelius Lake should be considered in the future if major sediment inflow events are

observed, or if the average annual rate of sediment accumulation requires further clarification. If an

aerial survey is conducted, it should be scheduled when the lake level drops enough to expose the

surface area under the majority of the trees that are now located throughout the reservoir.

8
REFERENCES

American Society of Civil Engineers, 1962. Nomenclature for Hydraulics, ASCE Headquarters,

New York.

Bureau of Reclamation, 1981. Project Data, Denver Office, Denver CO.

Bureau of Reclamation, 1985. Surface Water Branch, ACAP85 User's Manual, Technical

Service Center, Denver CO.

Bureau of Reclamation, 1987(a). Guide for Preparation of Standing Operating Procedures for

Bureau ofReclamation Dams and Reservoirs, U.S. Government Printing Office,

Denver, CO.

Bureau of Reclamation, 1987(b). Design of Small Dams, U.S. Government Printing Office,

Denver CO.

Bureau of Reclamation, September 2000. Denver Office, Keith Sebelius Lake Area and Capacity

Tables, Missouri River Project, Great Plains Region, Billings, MT.

Corps of Engineers, October 1994, Engineer and Design - Hydrographic Surveying, EM 1 110-2-

1003 (dir FR), Department of the Army, Washington DC.

(www.usace.army.mil/inetlusace. docs/eng-manuals/em .htm).

Environmental Systems Research Institute, Inc. (ESRI), 1992. ARC Command References.

9
RESERVOIR SEDIMENT

DATA SIMARY Keith Sebelius Reservoir

NANE OF RESERVOIR

DATA SHEET NO.

0 1. OWNER Bureau of Reclamation 2. STREPN Prairie Dog Creek 3. STATE Kanaaa

A 4. SEC. 8 TWP. 3 S RANGE 23 N 5. NEAREST P.O. Norton 6. COUNTY Norton

N 7. LAT 39° 48' 27" LONG 99° 56' 04" 8. TOP OF DAN ELEVATION 2347.0 9. SPILLWAY CREST EL 2296.01

R 10. STORAGE 11. ELEVATION 12. ORIGINAL 13. ORIGINAL 14. GROSS STORAGE 15. DATE

E ALLOCATION TOP OF POOL SURFACE AREA, AC CAPACITY, AF ACRE- FEET STORAGE

S

BEGAN

F

R

a. SURCHARGE 2341.0 6,713 58,285 193,023

V b. FLOOD CONTROL 2331.4 5,316 98,803 134,738

10/64 0

C. POWER _______________ ________________ ___________

R d. JOINT USE

________________

16. DATE

e. CONSERVATION 2304.3 2,181 30,651 _________________ ION

f. INACTIVE 2280.4 589 2,566 5,284 8EGAN

g. DEAD 2275.0 391 2,718 2,718 10/64

17. LENGTH OF RESERVOIR 6.5 MILES AVG. WIDTH OF RESERVOIR 0.5 MI2ET

B 18. TOTAL DRAINAGE AREA 683 SQUARE MILES 22. MEAN ANNUAL PRECIPITATION 212 INCHES

A

19. NET SEDIMENT CONTRIBUTING AREA 683 SQUARE MILES 23. MEAN ANNUAL RUNOFF O.47 INCHES

20. LENGTH MILES AV. WIDTH MILES 24. MEAN ANNUAL RUNOFF 17,100 ACRE-FEET

N 21. MAX. ELEVATION NIN. ELEVATION 25. ANNUAL TEMP. MEAN 53°F RANGE -27°F to 116°F2

S 26. DATE OF 27. 28. 29. TYPE OF 30. HO. OF 31. SURFACE 32. CAPACITY 33. C/I

U SURVEY PER. ACCL. SURVEY RANGES OR AREA, AC. ACRE-FEET RATIO AF/AF

R YRS. YRS. INTERVAL

V 10/64 Contour (D) 2-ft 2,18l 36,127 2.11

E

Y

D 9/00 36.0 Contour (D) 2-ft 2,1816 34,5106 2.02

A 26. DATE OF 34. PERIOD 35. PERIOD WATER INFLOW, ACRE FEET WATER INFLOW TO DATE, AF

T SURVEY ANNUAL ________________________________

A PRECIP. a. MEAN ANN. b. MAX. ANN. c. TOTAL a. MEAN ANN. b. TOTAL

9/00 l7,100 29,500 273,400 17,100 273,400

26. DATE OF 37. PERIOD CAPACITY LOSS, ACRE-FEET 38. TOTAL SEDIMENT DEPOSITS TO DATE, AF

SURVEY __________________________________________________

a. TOTAL b. AV. ANN. c. /MI.°-YR. a. TOTAL b. AV. ANNUAL c. /MI.°-YR.

9/00 1,6178 44.9 0.066 1,617 44.9 0.066

26. DATE OF 39. AV. DRY 40. SED. DEP. TONS/MI.2-YR. 41. STORAGE LOSS, PCT. 42. SEDIMENT

SURVEY WT. (#/FT°) _______________ _____________________________________________

a. PERIOD

_______________

b. TOTAL TO a. AV. b. TOTAL TO a. b.

9/00 0.12' 4.48'

26.

DATE

43. DEPTH DESIGNATION RANGE BY RESERVOIR ELEVATION

SURVEY

PERCENT OF TOTAL SEDIMENT LOCATED WITHIN DEPTH DESIGNATION

9/00

26. 44. REACH DESIGNATION PERCENT OF TOTAL ORIGINAL LENGTH OF RESERVOIR

DATE

SURVEY

0-10 10-

20

20-

30

30-

40

40-

50

50-

60

60-

70

70-

80

80-

90

90-

100

100-

105

105-

110

110-

115

115-

120

120-

125

PERCENT OF TOTAL SEDIMENT LOCATED WITHIN REACH DESIGNATION

Table 1. - Reservoir sediment data summary (page 1 of 2)

10
45. RANGE IN RESERVOIR OPERATION'

YEAR MAX. ELEV. MIN. ELEV. INFLOW, AF YEAR MAX. ELEV. MIN. ELEV. INFLOW, AR

_____________ _____________

1965 2,298.2 2,257.4 29,500

1966 2,302.6 2,300.9 19,500 1967 2,304.6 2,299.5 18,000

1968 2,300.6 2,293.6 11,200 1969 2,298.5 2,292.1 14,800

1970 2,293.2 2,284.4 9,500 1971 2,289.1 2,278.1 8,400

1972 2,284.8 2,284.8 9,800 1973 2,287.0 2,277.6 7,000

1974 2,283.0 2,276.9 6,600 1975 2,290.8 2,277.0 18,000

1976 2,288.6 2,284.6 6,100 1977 2,280.5 2,284.4 11,200

1978 2,285.7 2,283.9 5,200 1979 2,282.6 2,278.3 5,100

1980 2,282.3 2,277.0 2,500 1981 2,277.7 2,276.2 1,900

1982 2,278.5 2,275.8 2,500 1983 2,281.7 2,277.1 3,700

1984 2,282.2 2,278.9 3,400 1985 2,281.4 2,279.4 3,200

1986 2,283.0 2,279.4 5,300 1987 2,286.2 2,279.3 9,300

1988 2,286.9 2,283.2 6,500 1989 2,284.0 2,281.2 4,900

1990 2,283.9 2,278.5 7,600 1991 2,280.7 2,278.2 2,700

1992 2,289.1 2,277.7 8,300 1993 2,297.1 2,286.3 3,700

1994 2,300.6 2,297.0 4,200 1995 2,302.4 2,298.4 5,200

1996 2,306.2 2,298.2 18,600 1997 2,306.5 2,302.0

1998 2,304.3 2,303.4 1999 2,303.3 2,300.5

2000 2301.2 2.299.3 ______________ ______________

46. ELEVATION - AREA - CAPACITY DATA FOR 2000 CAPACI'°

ELEVATION AREA CAPACITY ELEVATION AREA CAPACITY ELEVATION AREA CAPACITY

2261 0 0 2265 34 43 2070 160 494

2275 317 1,636 2280 553 3,767 2280.4 575 3,993

2285 775 7,146 2290 1,071 11,644 2295 1,429 17,896

2300 1,787 25,936 2304.3 2,181 34, 510 2305 2,256 36,063

2310 2,820 48,685 2315 3,345 64,098 2320 3,834 82,065

2325 4,419 102,705 2330 5,076 126,465 2331.4 5,316 133,740

2335 5,953 154,024 2340 6,588 185,376 2341 6,713 192,027

47. REMARKS AND REFERENCES

Top of spillway crest is elevation 2,296.0. 2

Bureau of Reclamation Prolect Data Book, 1981.

Calculated using mean annual runoff value of 17, 100 AF, Item 24.

Computed annual inflows from 10/64 through 9/96. Missing va lues for water years 1997 through 2000)

Original recomputed surface area and capacity at el. 2,304.3. For sediment computation purposes the original

area and capacity was recomputed by the Reclamation ACAP program using the original 2-foot increment surface

areas.

6

Surface area & capacity at el. 2,304.3 computed by ACAP program.

Inflow values in acre-feet and maximum and minimum elevations in feet by wa ter year from 10/64 through 9/00.

Missing inflow values for water years 1997 through 2000.

Computed sediment volume at elevation 2,304.3.

Storage losses at elevation 2,304.3. 10 Capacities computed by Reclamation's ACAP computer program.

48. AGENCY MAKING SURVEY Bureau of Reclamation

49. AGENCY SUPPLYING DATA Bureau of Reclamation

J

DATE July 2001

Table 1. - Reservoir sediment data summary (page 2 of 2)

11
1 3 4 6 7 8 ___

2000 2000 Percent of

Elevations Original -

Original j 2000J 2000 Sediment Percent of Reservoir

Survey Capacity Survey Survey Volume Sediment Depth

(feet) (acres) (acre-feet) (acres) (acre-feet) 4 (acre-feet)

6713.0 193644 6713.0 1 192027 L

1617 ? 100.0

2,340.0k 6588.0 186994 6588. 18537k 1618 98.9

2,335.0 1

5953.0 , 155641 154024 1617 93.6

2,331.4 5316.0 ] 13 316.0 133740 1617

-

89.8

I - -

2,330.0 5076.0] 128082j 5076.0 126465 1617 88.3

2,325. 44i9.0 - 104322

_

i0 102705 1617

-

L 83.0

2,320.0 1

3834.0 8368 3834.0 820651

2,3159j 3345.0 65715 3345.0 64098 L

1617 72.3

2,310.0 1 2820.0 50302 2820.0 48685 1617 67.0

2,305.0 2260.0 37680 2256.0 1

36063 1617 61.7

2,304.3 2181.0 36127 2181.0 34510 1617 100.0 61.0

2,300.0 1787.0 27553 1787.0 25936 -

1617 100,0 56.4

2,295.0 1438.0 19484 1429.0j 17896 1588 98.21 51.1

2,290.0 1117.0 13279 1071.0 11644 1635J 101.1? 45.7

2,285.0 807.0 8558 775.0 7146,

-

1412 87.31 40.4

2,280.4 589.0 5323 575.0 3993 1330 82.3 L

92 3Q1 2,280.0 568.0 50 37 7 1

55 6 1325 81.9 35.1

2,275.0 391.0] 2745 317.0 1636 1109 68.6 29.8

2,270.2]_

235.0 1122 160.0 494 628 38.8 24.5

2,265.0 89.0 302 34.01 43 259 iol 19.1

31.0 62 0. 0 62

_____

3.8 1

14.9

2,260.01 19.0 62 0.0 0 62

______ 3.4 13.8

-

-

_

1 1 ievation of reservoir water surface.

2 [_Original_reservoir surface area.

3 J

4

Original reservoir capacity recomputed using ACAP. -

Reservoir surface area from 2000 survey.

-

5

- --______

Reservoir capacity computed using ACAP

_ -. _________

6

.

Measured sediment volume column (3) - column (5).

_______

-

L__

7 Measured sediment expressed in percentage of total sediment 1,617.

8 Depth of reservoir expressed in percentage of total depth of 94 feet.

Table 2. - Summary of 2000 survey results

12
E

lDI
Space intentionally left blank due to security concerns 
N

_

-

w E

$

B j ,

ke/, /:2W

Pr

\O)) I I

IlortZontal datum based on KSOSSCS

-

r Stete P)ane coordnete Syste North

Zone (NAD83)

Vertical datum based on Bureau

of Reclamation. North Amaricen

Datum of 1929

.w miT

-_

W .93fl/5' L4tF

I(8T_ rgy#/1c41 V__

_________________________________________________________________________

Dt,rer, Cv/orudo ' 197+165

[S

Figure 3. - Keith Sebelius Lake topographic map, No. 492-D-3
Figure 4. - Keith Sebelius Lake topographic map, No. 492-0-366
NS

IN!

*

/,

!:

A

___

Locat ion

/

1$ortZOntai datum ase on Kansas E

State Plane Coordinate System. North

Zone (NAD83

s30000± Vertical datum based on Bureau

of Reclamation. North American

Datum of 1929.

4l $?I

.fSW 9S

- M*N4

) Fl/Il L4tF

t4?MW8T TfcW/C41 AL_

'ED

De,n'er, Colon'elo ,4t Ii, 2001 19/-I1-267

19

Figure 5.

- Keith Sebehus Lake topographic map, No. 492-D-367
N

w

cw

I Ia' A

Y.'.I,: /:

Horizonta) datum Daaed on Kansas 9

Stste Plane COor'dnate System. Ncnth

Zone (NADB3)

Vertical datum bsed on Oureau

of 4eclamation. North American

Datum of i92.

Figure 6. - Keith Sebelius Lake topographic map, No. 492-fl-3i
N

w

PNI

.

Ie.1., /

HoZont1 betum beaed on Kaneess

Stste Pisne Coordnete System. North

Zone (NADS3)

VQrtce detum based on Bureau

O Reciameton. North American

Datum of 1929

23

Figure 7. - Keith Sebelius Lake topographic map, No. 492-D-369
6800.0

2,345.0

2,325.0

2,305.0

0

0

0

w

2,285.0

2,265.0

2,245.0

0

Area-Capacity Curves for Keith Sebelius Reservofr

Area (acre)

6120.0 5440.0 4760.0 4080.0 3400.0 2720.0 2040.0 1360.0 680.0

Area

2000 Survey

Original Survey

-

19500 39000 58500

0.0

- 2,345.0

2,325.0

2,305.0

2,285.0

2,265.0

- 2,245.0

78000 97500 117000 136500 156000 175500 195000

Capacity (acre-feet)

Figure 8. - 2000 area and capacity curves