LAKE LIVINGSTON

1991 SEDIMENTATION SURVEY

Owned and Operated by the Trinity River Authority of Texas

Lake Livingston Project

US. Department of the Interior

Bureau of Reclamation
7-2090 14-81)

Bureau of Reciamation TECHNICAL REPORT STANDARD TITLE PAGE

1. REPORT NO. 3. RECIPIENTS CATALOG NO.

4. TITLE AND SUBTITLE 5. REPORT DATE

LAKE LiVINGSTON SEDIME TA

May 1993

- 1991 N TION

SURVEY

6. PERFORANG ORGANIZATION CODE

D-5753

7. AUTHOR(S) 8. PERFORMING ORGANIZATION

Ronald L. Ferrari

REPORT NO.

9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. WORK UNIT NO.

Bureau of Reclamation

Denver Office

11. CONTRACT OR GRANT NO.

Denver CO 80225 13. TYPE OF REPORT AND PERIOD COVERED

12. SPONSORING AGENCY NAME AND ADDRESS

DIBR

Same

14. SPONSORING AGENCY CODE

______________________________________________________

D-5753

15. SUPPLEMENTARY NOTES

Microfiche and hard copy available at the Denver Office, Denver, Colorado. Ed: TH

16. ABSTRACT

The Bureau of Reclamation Sedimentation Section surveyed Lake Livingston in 1991 to gather

data needed to compute the capacity of the lake for reservoir operation. The data were also used

to calculate the volume of sediment that has accumulated in the lake since water storage began

in June 1969. Reclamation's large vessel system was used to collect range line data. The

remaining data were collected by Reclamation's small boat bathymetric system. The 1991

reservoir surface areas were computed by the Width Adjustment Method. The storage-elevation

relationships based on the 1991 underwater survey data were developed using Reclamation's

area-capacity computer porgram ACAP85.

The 1991 survey determined that the reservoir has a storage capacity of 1,741,867 acre-feet and

a surface area of 83,277 acres at the top of conservation storage elevation 131.0. Since closure in

1969, the reservoir has accumulated a volume of 64,227 acre-feet of sediment below elevation

131.0. This volume represents a 3.56-percent loss in total capacity and an average annual loss of

2,854 acre-feet for the operation period of June 1969 through December 1991.

17. KEY WORDS AND DOCUMENT ANALYSIS

a. DESCRIPTORS- reservoir area and capacity! sedimentationl reservoir surveys! sonar!

sediment distribution! contour area! reservoir area! sedimentation survey!

b. IDENTIFIERS- Lake Livingston! Trinity River Authority!

c. COSATI Field/Group 13/B COWRR: 1302.66 SHIM:

18. DISTRIBUTION STATEMENT 19. SECURITY CLASS 21. NO. OF PAGES

(THIS REPOF)T) 45 UNCLASSIFIED

20. SECURITY CLASS 22. PRiCE

(THIS PAGE)

UNCLASSIFIED
LAKE LIVINGSTON

1991 SEDIMENTATION SURVEY

Lake Livingston Project Owned and Operated by

Trinity River Authority of Texas

1991 Sedimentation Survey Report prepared by

RONALD L. FERRARI

BUREAU OF RECLAMATION

EARTH SCIENCES DIVISION

SURFACE WATER BRANCH

SEDIMENTATION SECTION

DENVER OFFICE

DENVER, COLORADO

1992
ACKNOWLEDGMENTS

The Bureau of Reclamation prepared and published this report

under the supervision of Robert I. Strand, Head, Sedimentation

Section, Earth Sciences Division. The hydrographic survey was

supervised by Ronald Ferrari, Hydraulic Engineer, and assisted

by Steven Hughes, Engineer Technician, of the Denver Office.

Personnel from the Trinity River Authority at Livingston,

Texas, assisted in the hydrographic survey. A private contractor

for the river authority performed the land survey required for

the hydrographic survey. Ronald Ferrari completed the data

processing, sediment computations, area-capacity tables, and

the report. Robert I. Strand and James 0. Blanton ifi,

Hydraulic Engineer, consulted in the sediment computations

and report preparation.

Missiorn As the Nation's principal conservation agency, the

Department of the Interior has responsibility for most of our

nationally owned public lands and natural and cultural

resources. This includes fostering wise use of our land and

water resources, protecting our fish and wildlife, preserving

the environmental and cultural values of our national parks

and historical places, and providing for the enjoyment of life

through outdoor recreation. The Department assesses our

energy and mineral resources and works to assure that their

development is in the best interests of all our people. The

Department also promotes the goals of the Take Pride in

America campaign by encouraging stewardship and citizen

responsibility for the public lands and promoting citizen

participation in their care. The Department also has a major

responsibility for American Indian reservation communities

and for people who live in Island Territories under

U.S. Administration.

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 the Bureau of

Reclamation.

ii
Co NTENTS

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Page

Introduction 1

Summary and conclusions 2

Description of basin 2

Surveys 3

Survey history 3

Survey methods and equipment 4

Reservoir sediment distribution 5

Longitudinal distribution 5

Lateral distribution 5

Sediment analyses 6

1991 surface areas 6

1991 revised storage capacity 6

Reservoir sediment accumulation and summary 7

References 8

TABLES

Table

1 Reservoir sediment data summary 9

2 Summary of 1991 survey results 11

FIGURES

Figure

1 Lake Livingston vicinity and drainage area map 13

2 Lake Livingston range location map (1 of 2) 15

3 Lake Livingston range location map (2 of 2) 17

4 Longitudinal profile - Trinity River 19

5 Sediment Range 101 (1A) - Trinity River 20

6 Sediment Range 1 -Trinity River 21

7 Sediment Range 2 -Trinity River 22

8 Sediment Range 3 -Trinity River 23

9 Sediment Range 301 (3A) - Trinity River 24

10 Sediment Range 4- Trinity River 25

11 Sediment Range 5- Kickapoo Creek 26

12 Sediment Range 6 - Kickapoo Creek 27

13 Sediment Range 601 (6A) - Kickapoo Creek 28

14 Sediment Range 7 -Trinity River 29

15 Sediment Range 701 (7A) - Trinity River 30

16 Sediment Range 8 -Trinity River 31

17 Sediment Range 9 -Trinity River 32

18 Sediment Range 10 - Trinity River 33

19 Sediment Range 11 - Trinity River 34

20 Sediment Range 12 - White Rock and Caney Creeks 35

21 Sediment Range 121 (12A) - Caney Creek 36

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CONTENTS -Continued

FIGURES -Continued

Figure Page

22 Sediment Range 122 (12B) - White Creek 37

23 Sediment Range 13- Trinity River 38

24 Sediment Range 14- Trinity River 39

25 Sediment Range 15- Trinity River 40

26 Sediment Range 16- Trinity River 41

27 Sediment Range 17- Trinity River 42

28 Sediment Range 18- Trinity River 43

29 Width adjustment method for revising contour areas 44

30 Area and capacity curves - Lake Livingston 45

iv
INTRODUCTION

Livingston Dam was a major step taken by the City of Houston, in cooperation with the ThA (Trinity

River Authority), to develop a source of water primarily for the expanding industry in the Houston

Industrial Complex. TRA built, owns, manages, and operates the dam, reservoir, and recreational

facilities associated with the project. Construction of the dam was completed in September 1968. Water

storage operations began in June 1969. The dam, located on the Trinity River, is about 7 miles

southwest of Livingston and 75 miles north of Houston (fig. 1). The reservoir impounded by the dam lies

in Polk, San Jacinto, Walker, and Trinity Counties, and extends upstream about 36 air miles. The

reservoir provides a multi-purpose project with the developed municipal and industrial water supply,

fish and wildlife resources, and recreational uses.

TRA is a political subdivision charged by Texas legislative mandate with three functions:

• Maintaining a master plan for basin wide development.

• Serving as local sponsor for Federal water projects.

• Providing authorized services such as water and wastewater treatment, flood control, and

recreational, hydroelectric, navigational, and reservoir facilities.

TRA operates as a governmental utility receiving no direct tax revenues or revenue sharing and is

compensated for services rendered by each facility which is financed independently. These facilities are

located throughout the basin from Dallas-Fort Worth to Houston.

The dam axis extends across the Trinity River about 11 river miles upstream from the U.S. Highway 59

Trinity River crossing. The dam is a rolled earthfill embankment structure consisting of an impervious

center core section with an average structural height of 55 feet. The dam crest has a maximum elevation

of 145 feet, mean sea level, which is 90 feet above the original streambed. The dam has a crest length,

including spillway, of 13,480 feet, with an average base width of 310 feet and crest width of 24 feet. The

spillway, located near the left end of the dam, is a 646-foot reinforced concrete gravity structure

controlled by twelve 40- by 32-foot tainter gates with a discharge capacity of 313,000 ft3/s (cubic feet per

second) at maximum design water surface elevation 135.0. The outlet works for low-flow releases are

located in a vertical concrete multi-gated inlet tower. Five gated openings are located at various

elevations, minimum elevation 58.0, in the tower. All openings discharge into a 10-foot-diameter

concrete conduit constructed through the dam.

Lake Livingston has a length of 55 miles and an average width of 0.42 miles at the normal pool

elevation of 131.0. The average width is determined by dividing the surface area by the reservoir length

at elevation 131.0. The total Trinity River drainage area above Livingston dam, which is 360 miles in

length, is 16,583 square miles, of which 8,423 square miles contribute sediment inflow.
At the beginning of operations in 1969, the reservoir at maximum elevation 135.0 had a calculated

surface area of 91,000 acres with a capacity of 2,135,324 acre-feet. This capacity included

347,200 acre-feet of flood surcharge between elevation 131.0 and 135.0, 1,787,773 acre-feet of

conservation between elevation 58.0 and 131.0, and 351 acre-feet of inactive storage below elevation

58.0. At elevation 131.0, top of conservation, the calculated surface area was 82,600 acres with a

capacity of 1,788,125 acre-feet.

SUMMARY AND CONCLUSIONS

This report presents the results of an investigation to monitor changes caused by sediment

accumulations in Lake Livingston after 22.5 years of reservoir operations. It also describes the field

surveying procedures and equipment used in the 1991 investigation, and provides some data needed for

future surveys. The primary purpose of running the 1991 survey was to gather data needed to compute

the capacity of Lake Livingston for reservoir operation.

Standard land surveying methods were used to augment previously established horizontal control for

the survey. The hydrographic survey was completed using sonic depth recording equipment interfaced

with both an automated positioning system and a land based distance meter. The systems continuously

recorded reservoir depths and horizontal distances from fixed points as the boat was steered across the

range line. Reservoir water surface elevations were used as control in converting the depth

measurements to true bottom elevations.

Table 1 contains a summary of reservoir sediment data for the 1991 survey. The 1991 survey

determined that the reservoir has a storage capacity of 1,741,867 acre-feet and a surface area of

83,277 acres at the top of conservation storage elevation 131.0. Since closure in 1969, the reservoir has

accumulated a volume of 64,227 acre-feet of sediment below elevation 131.0. This volume represents a

3.56-percent loss in total capacity and an average annual loss of 2,854 acre-feet for the operation period

of June 1969 through December 1991.

DESCRIPTiON OF BASIN

The Trinity River drainage basin is only 360 miles long, but the river, because of its meandering course,

is almost twice that length - 715 miles. The basin drops some 1,250 feet from North Central Texas to

its mouth at the Gulf of Mexico (fig. 1). The mean annual runoff of the drainage basin above Livingston

Reservoir is 4,925,000 acre-feet. The runoff was calculated using the average flow at the USGS (U.S.

Geological Survey) gauge Trinity River at Riverside, Texas, which accounted for 94 percent of all

reservoir area inflow. The average at this gauge was 4,630,00 acre-feet for the measured 48 years of

record (January 1903 to December 1906 and October 1923 to September 1968). The gauge was

discontinued in 1968 because of the backwater affect of Lake Livingston. The total Trinity River

drainage area above Livingston dam is 16,583 square miles, of which 8,423 square miles contribute

sediment inflow. Several reservoirs are located on the river system within the basin above Lake

2
Livingston Dam as seen on the map. The net contributing area includes removal of the area of Lake

Livingston and all areas above the upstream developed reservoirs that are assumed to trap all sediment

inflow. A listing of the reservoirs and their drainage areas, which were removed as nonsediment

contributing, are listed in table 1 under item 47, Remarks and References.

SURVEYS

Survey History

The original sediment ranges were surveyed by a contractor for TRA prior to inundation of water behind

Livingston Dam. These data were stored in field books and were not processed and plotted until the

1991 study. The present survey contractor processed the data from the original notes for range lines 1

through 18. The range lines were plotted by Reclamation (Bureau of Reclamation) from left to right

bank looking downstream. For purposes of sediment computations, six additional range lines were

located and surveyed in 1991. These range lines included and were labeled IA or 101, 3A or 301, 6A or

601, 7A or 701, 12A or 121, and 12B or 122 and 123. A layout of the reservoir sediment range system is

shown on figures 2 and 3. The original distance versus elevation data for these added range lines was

determine from the 1972 photorevised USGS 7-1/2 quad maps of the reservoir area. The interpolated

data were smoothed using the 1991 collected data.

The total original surface areas for the 10-foot increments of Lake Livingston, elevation 60.0 through

140.0, were obtained from the 1960 U.S. Geological Survey 7-1/2 minute quadrangle maps developed

from photographic data obtained in 1958. For the purposes of the 1991 sedimentation analysis and to

better represent storage changes, the reservoir was subdivided into segments using the rare lines to

delineate the limit of each segmental boundary. The total original contour areas for all segments of the

range-line network system were needed as input. These areas were obtained by a TRA contractor using

a computer digitizing program and the 1960 USGS 7-112 minute quad maps that were photorevised in

1972. The revised quads were used because a copy of the original 1960 maps was not located and it was

assumed that the uiiderwater contours on the revised maps were unchanged from the original. The

photorevised maps have the reservoir area shaded in purple, which covered the original contours and

made interpretation of the contours difficult. The photorevised maps also had contours drawn for

reservoir elevations 131.0 and 135.0.

The contractor digitized the segmented areas of the 10-foot contours for elevations 60.0 through 130.0

and the upper reservoir contour elevation 135.0. A listing of these digitized segmented surface areas was

made available to Reclamation for analysis. A comparison of the total segmented areas with the original

areas found some disparities. The total segment areas for elevations 90.0 through 130.0 compared well

with the original areas, but significant difference existed among the total areas at elevations 60.0, 70.0,

and 135.0. A slight difference existed at elevation 80.0. Further investigation into these disparities

concluded that in addition to the problem of distinguishing the contours on the photorevised shaded

maps, the interpretation of the contour crossings at elevations 60.0, 70.0, and 80.0 was made more

difficult because they were located within the original river channel area. These problems were resolved

3
by using the original range line survey data. The cross section width at elevations 60.0, 70.0, and 80.0

was calculated for the segments where the contours were located within the river channel. The contour

surface areas for the segments meeting these conditions were recalculated using the average width and

river channel length for each segment. A summation of these calculated areas compared well with the

total original areas and was used for the 1991 sedimentation analysis.

The summation of the digitized segmented areas for elevation 135.0 was found to be 3.8 percent higher

(94,547 acres compared to 91,000 acres) than the original area at this elevation. This area was originally

calculated using measured surface area data at contour elevations 130.0 and 140.0 from the USGS quad

maps. For the 1991 sedimentation study, it was assumed that the digitized area at this elevation was

more accurate than the original calculated area and should be used to develop the new area capacity

tables. This assumption has no bearing on the total sediment calculation because the collected data

found all measured changes to be below elevation 130. Because the original capacity data had to be

recomputed for sediment computation purposes, it was decided to use this digitized area for elevation

135.0.

Survey Methods and Equipment

The preliminary field work for the 1991 survey began in October and consisted of locating and flagging

the existing sediment range end markers, relocating the destroyed ones, and establishing additional

points needed for the hydrographic survey. The hydrographic survey was completed from November 11

through November 15, 1991 (reservoir elevation 131.34 through 132.42), using the large vessel system,

and from December 16 through December 18, 1991 (reservoir elevation 131.35 through 131.56), using

the small boat system.

Following are descriptions of the Reclamation systems used to collect the hydrographic survey data:

1. Reclamation's large vessel system was used to collect the data for the range lines starting at IA,

near the dam, upstream to range line 8 (excluding 6A). Range line 6A was surveyed using the small

boat system as described in the following paragraph. The large vessel bathymetric collection system

consisted of electronic positioning equipment interfaced with a sonic depth recorder. The positioning

system transmitted line-of-sight microwave signals to known shore stations and converted the reply

time to range distances, which were used by the system data logger to compute the coordinate

position of the survey vessel. The survey system continuously recorded reservoir depth and horizontal

coordinates as the survey vessel moved across the reservoir. The system gave directions to the vessel

operator to assist in maintaining course along the prescribed range line alignment. During each run,

the depth and position data were recorded at two second intervals, by a lap-top computer, for

subsequent processing by Denver Office personnel. Water surface elevations recorded during the time

of collection were used to convert the sonic depth measurements to true lake bottom elevations.

2. The remaining data were collected by Reclamation's small boat bathymetric system. This system

consisted of a sonic depth recorder and reflector prism mounted on a small boat. It was decided to use

the Livingston Office's air boat even though it was harder to keep on-line because of its steering

4
limitation and boat noise, which made it difficult to hear directional communication from the

shorepositioned personnel. Because the reservoir was nearly full, this type of boat was the only way

to collect data for the majority of the upper reservoir range lines because of the shallow water and

hazard conditions that covered large portions of the ranges. The hazards included downed trees,

stumps, and shallow areas with tall grass. The distance from a known point to the small boat was

determined as it proceeded along the range line by an EDM (electronic distance measuring)

instrument set up on shore and aimed at the reflector target mounted on the survey boat. Range

distances were communicated, by radio, from shore to the boat at preselected intervals and marked

on the sonar charts as the boat proceeded across the reservoir. The boat was held on course as closely

as possible by radio communication from the EDM operator to the survey boat.

RESERVOIR SEDIMENT DISTRIBUTION

I

Longitudinal Distribution

The distribution of sediment throughout the length of the reservoir is illustrated by a plot of the thalweg

profile representing the original and 1991 resurveyed profiles as shown on figure 4. The thalweg is the

line connecting the lowest or deepest point along the streambed. Thalweg elevations representing

original and 1991 reservoir conditions were taken from the survey notes. Except for the possibility of

some missed low point soundings during the original survey, the plotted profile should closely resemble

the deepest channel bottom conditions during the original range line survey completed prior to

inundation of the reservoir. Except for some minor inaccuracies in sounding and being slightly off line,

the bottom of the 1991 proffle should closely represent the deepest channel bottom conditions at the

time of the resurvey. The channel distance used for range line location is the original river channel

distance from the dam to each range line as you proceed upstream.

Lateral Distribution

Ground profiles for the 24 original sediment ranges are shown on figures 5 through 28. The 1991 range

profile data are superimposed on these plots to indicate the changes which have occurred and to

represent in general the lateral distribution of sediment within the reservoir. A 1991 survey was not

accomplished for range line 19 because of location and weather conditions. This omission had no

significant impact on storage capacity computations because this range is located and represents only

the river channel of the extreme upstream part of the reservoir where little sediment deposition has

occurred as indicated by range lines 17 and 18. Because the 1991 survey only covered the reservoir area

of pooi elevation 131.4 and below, it was assumed that no change occurred above this elevation. For

sediment computation purposes, a complete section was needed for all ranges. For this reason, the

original data was inserted into the 1991 data file to complete any areas not surveyed in 1991.

Concern exists for the future monitoring of the large reservoir surface area of segment 18, which is

located between range lines 18 and 19 on the Trinity River and includes the Harmon Creek arm of the

reservoir. The physical makeup of this portion of the reservoir has the potential to form a large

sediment delta when high Trinity River inflows occur during high reservoir stage. As the high inflows

pass range line 19, the sediment would be deposited as the inflow velocities decrease in this large bay

5
area. Because of their location, surveying range lines 18 and 19 would not measure the sediment

deposited outside of the original river channel. Future sedimentation surveys may need to consider

mapping this bay area to measure any surface area change caused by sediment deposition.

SEDIMENT ANALYSES

1991 Surface Areas

The 1991 reservoir surface areas were computed by the Width Adjustment Method as described by

Blanton (1982) and illustrated on figure 29. The method entails computing the new segmented contour

area, A1, between any two ranges by applying an adjustment factor to the original segmental contour

area, A0. To better represent storage changes the reservoir was subdivided into segments using the

sedimentation range lines to delineate the limit of each segmental boundary. Segmental contour areas

for each elevation were determined by digitizing the segmental contours on the 1972 photorevised

USGS quads as described in the survey history section. A comparison of the simultaneous plots of

original and 1991 range profiles indicated the lateral distribution of sediment at the different measured

contour elevations. Where these plots indicate changes have occurred on the side slopes of the reservoir,

a judgement decision was made to determine whether the change was caused by survey inaccuracies,

actual deposition, or erosion. The adjustment factor for each segment was the ratio of the new average

width to the original average width for both the upstream and downstream ranges at the specified

contour elevation.

The above described calculation was completed by Reclamation's computer program RESSED. The

input data included the original and 1991 range line data along with the segmented areas for the

specified contour elevation. The program currently resides on Reclamation's CYBER mainframe

computer. The program computes the 1991 surface area for each segment at the given contour

elevations. The output lists the revised areas for each segment and notes where judgement led to

overriding certain adjustment factors caused by survey inaccuracies. The total surface area at the given

contour elevation was computed as the summation of all segmental areas at that elevation.

1991 Revised Storage Capacity

The storage-elevation relationships based on the 1991 underwater survey data were developed using

Reclamation's area-capacity computer program ACAP85 (Bureau of Reclamation, 1985). The 1991

surface areas resulting from the RESSED computations at 10-foot contour intervals from elevation 60.0

through 130.0 and at elevation 135.0 were used as the control parameters for computing reservoir

capacity. The program computes an area at 0.01- to 1.0-square foot area increments by linear

interpolation between the given contour intervals. The program begins by testing the initial capacity

equation over successive intervals to ensure that the equation fits within an allowable error limit, which

was set at 0.000001 for Livingston Reservoir. This 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 the basic area curve over that interval)

begins testing the fit until it also exceeds the error limit. Thus, the capacity curve is defined by a series

6
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:

y = a1+ax+a3x2

where:

y = capacity,

x = elevation above a reference base,

a1 = intercept, and

a2 and a3 = coefficients

Results of the 1991 Livingston Reservoir area and capacity computations are listed in tables 1 and 2 and

plotted on figure 30. A separate set of 1991 area and capacity tables has been published for the 0.01-,

0.1-, and 1-foot elevation increments (Trinity River Authority, 1991). The 1991 area and capacity

computations results are listed in columns (5) and (6) of table 2. Column (2) in the table gives the

original measured contour areas used in the original area and capacity computation with the exception

of the newly measured value at contour elevation 135.0. To make a valid comparison with the 1991

computed values, these original capacity values were also recomputed by ACAP85 using the same

original surface areas and the newly measured value at elevation 135.0. Thus, the capacity values in

column (4) differ somewhat from those found in column (3) and in the original area and capacity tables.

Both the original and 1991 area and capacity curves are plotted on figure 29 for a visual comparison of

changes. The 1991 survey determined that the reservoir has a storage capacity of 2,097,515 acre-feet

and a surface area of 94,547 acres at ñiaxirnum reservoir elevation 135.0, and a storage capacity of

1,741,867 acre-feet and a surface area of 83,277 acres at the top of conservation storage elevation 131.0.

The sediment computations would not be affected if it is determined that the original surface area of

91,000 acres should be used at elevation 135.0. The effect would only be noticed in the area and storage

capacity computations above elevation 130.0. Using the 1991 survey data with this restriction, the

reservoir would have a storage capacity of 2,088,648 acre-feet and a surface area of 91,000 acres at

maximum reservoir elevation 135.0, and a storage capacity of 1,741,512 acre-feet and a surface area of

82,568 acres at the top of conservation storage elevation 131.0. This decision has little effect on the

calculated capacity difference at elevation 131.0 (355 acre-feet), but has a major effect on the capacity

calculation at elevation 135.0 (8,867 acre-feet) and ultimately on the available capacity for flood

surcharge storage.

Reservoir Sedimentation Accumulation and Summary

Sediments have accumulated in Lake Livingston to a total volume of 64,227 acre-feet below elevation

131.0, top of reservoir conservation, since storage began in June 1969. This volume represents a

3.56-percent loss in total capacity and an average annual accumulation rate of 2,854 acre-feet for the

22.5-year period of operation. The net sediment accumulation rate from the contributing basin was

0.329 acre-feet per square mile per year for the same period.

7
The results of the sediment data and volume computations for the 1991 survey are shown in tables 1

and 2. The data include a tabulation of incremental sediment inflow volume and sediment accumulation

computed for the period between initial conditions and the 1991 resurvey. Table 1 includes information

on the drainage basin, records ofinflow, reservoir operations and reservoir sthrage.

REFERENCES

Blanton, James 0. ifi, Procedures for Monitoring Reservoir Sedimentation: Technical Guideline,

Bureau of Reclamation, Denver, Colorado, 1982.

Bureau of Reclamation, ACAP85 User's Manual, Bureau of Reclamation, Denver Office, Denver,

Colorado, 1985.

Trinity River Authority, Lake Livingston Area and Capacity Tables, Lake Livingston Project,

Huntsville, Texas, 1991.

U.S. Army Corps ofEngineers, WaterResourcesDeveiopment in Texas, 1988, Dallas, Texas, 1988.

8
RESERVOIR SEDIMENT

DATA SUMMARY Livinciston Reservoir

NAME OF RESERVOIR 1

DATA SHEET NO.

•5 1. aNER Trinity River Authority 2. STREAM 'trinity River 3. STATE Texas

A 4. SEC. TWP. RANGE 5. NEAREST P.O. Goodrich 6. COUNTY PoLk - San .Jacint

N 7. LAT 30' 38' 00" LONG 95 00' 36" 8. TOP OF DAM ELEVATION 145.0 8. SPILLWAY CREST ELEV. 99.0'

T

E

10. STORAGE

ALLOCATION

11. ELEVATI

TOP OF POOL

ON 2. ORIGINAL

SURFACE AREA, Ac

13. ORIGINAL

CAPACITY, Al

4. GROSS STORAGE

ACRE- FEET

15. DATE

STORAGE

BEGAN

a. FL000 CONTROL 135.0 91,000 347,550 2,135,324

R b. t4JLTIPLE US!

______________ ________________ 9/29/68* V

O

c.POWER __________ _________ ___________ _______

I d. WATER SUPPLY 16. DATE

R

________________ ______________ _________________

NORMAL

_______________ OPERATION

f. CONSERVATION

_ __________

131.0

_____

82,600 1,787,774 1,788,125 BEGAN

g. INACTIVE 58.0 234 351 351 6/26/69

11. LENGTH OF RESEh 01k 55 MILES AVG. WIDTh OF RE RVOIR 0.44 MILES

T 18. TOTAL DRAINAGE AREA 16,583 SQUARE MItES 22. MEAN ANNUAL PRECIPITATION INCHES

19. NET SEDIMENT CONTRIBUTING AREA 8, 423' SQUARE MILES 23. MEAN ANNUAL RUNOFF INCHES

I 20. LENGTH 360 MILES AV. WIDTH 46 MILES 24. MEAN ANNUAL RUNOFF 4,925,000k ACRE-FEET

N

21. MAX. ELEVATION 1250 MIN. ELEVATION 58.0 25. ANNUAL TP. MEAN •F RANGE F to 'F

T" 26. DATE OF 27. 28. 29. TYPE OP 30. NO. P 31. SURFACE 32. CAPACITY 33. C/I

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

R YRS. YRS. INTERVAL

E 6/69 Contour (R)* 10-ft 83,277' 1,806,094' 0.37

Y

12/91 22.5 22.5 Range (D) 24 83,277 1,741,867 0.35

D

A

T

_________________

26. DATE OF 34. PERIOD 35. PERIOD WATER INPLCM, ACRE FEET WATER INFLCM TO DATE, Al

A SURVEY ANNUAL

PRECIP.

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

12/91 22.5 4,240,000' 9,727,000' 95,409,000' 4,240,000' 95,409,000'

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

SURVEY

a. TOTAL b. AV. ANN. C. /MI.'-YR. a. TOTAL b. AV. ANNUAL C. /MI.'YR.

12/91

-

64,227 2,854 0.329' 64,227 2,854 0.3298

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

SURVEY WT. (#/FT') INFLOW, PPM

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

DATE ANNUAL DATE PER. TOT.

12/91 0.158' 3.56'

26. 43. DEPTH DESIGNATION RANGE IN FEET BELOW TOP OF CONSERVATION (ELEVATION 131.0.)

DATE

OF 76.0- 61.0- 51.0- 41.0- 31.0- 21.0- 11.0-

SURVEY 61.0 51.0 41.0 31.0 21.0 11.0 el.131

PERCENT OF TOTAL SEDIMENT LOCATED WITHIN DEPTH DESIGNATION

12/91 6.3 8.7 14.0 21.5 20.2 17.9 11.4

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

DATE 0-10 10- 20- 30- 40- 50- 60- 70- 80- 90- 100- 105- 110- 115- 120-

SURVEY 20 30 40 50 60 70 80 90 100 105 110 115 120 125

PERCENT OF TOTAL SEDIMENT LOCATED WITHIN REACH DESIGNATION

N/A

Table 1. - Reservoir sediment data summary.

9
4. RANGE IN RESERVoIR OPDLAtTON "

WATER YEAR MAX. ELEV. NIH. ZLEV. INFLOW, AF' WATER YEAR MAX, ELEV. KIN ELEV, INFLOW, AF'

1969" 103.6 100.7 214,000 1970 120,9 99.2 3,818,000

1971 1266 123.0 979,000 1972 131.6 130.1 4,004,000

Tt973 131,6 151.0 3,895,000 1974 131.7 130.0 4,617,000

1975 13L4 130.6 8,338,000 1976 132.0 130.2 3,135,000

1977 131.6 129.7 4,711,090 1978 131.1 126.9 1,081,000

1919 131.3 126.6 4.066,000 1960 131.5 127.4 2,265,900

1981 1322 12L4 2,697,000 1982 131.9 130.9 7,267,000

1963 131.9 130.8 3,257,000 1984 131.8 129.3 1,655,000

1985 132.2 129.2 4,322,000 1986 131.6 130.3 6,098,000

1987 132.3 130.1 4,957,000 1988 131.7 125.5 1.663,000

1989 152.6 125.4 6,26S,00 1990 132.5 130.6 9, 727,000

1991 131.7 130.8 4,378,000 1992 - - -

48, ELEVATION - AREA - CAPACITY DATKTOR C.utIGIUL CAPIT!

__________ __________ __________ __________

ELZV. AREA CAP. ELEV. AREA CAP. ELEV. AREA CAP.

55 0 0 90 5,930 64,775 130 80,480 1,724,225

60 390 975 100 19,840 193,625 131 (83,277) 1,806,004

70 1.180 8.825 110 41,520 500,425 135 94,547' 2,161,742

80 2,040 24,925 120 61,390 1,014,975

46. r.LEVATrDN - AREA - CAPACITY DATA rOR 1991 TOTAL APhcxTY

ELEV. AREA CAP. ELEV. AREA

_________

CAP.

_____

ELEV.

____ _________

AREA

_________

CAP.

59.6 0 0 65 3,086 26,119 115 50,310 682,519

60 82 16 90 4,933.7 46,168 120 59,920.6 958,095

65 476 1,411 95 11,500 87,253 125 70,190 1,283.372

70 8590 4,773 100 18,086.1 161.170 130 80,480 1,659.998

73 1.034 9,379 105 29,383 279,794 131. 83,271 1.741.867

80 1,238.2 15,309 110 40,598,8 454,998 135 94,547 2.097,515

47. REMARKS AND REFERENCE

Sill of tainter gate, top of tainter gates is elevation 134.0,

2 m dam was completed 9/29/68, with deliberate impoundment beginning 6/26/69.

Represents loss of contributing areas since dam closing at Richiand in 1987 (285 m12 ), Navarro in 1963 (320 mi2),

Bardwell in 1965 (178 m12), Cedar in 1965 (1,007 m12), Ray Hubbard in 1978 (184 rn!2), Lavon in 1953 (770 mi2),

Mountain Creek in 1937 (295 rni2), Arlington in 1957 (143 mi2), Benbrook in 1952 (429 rni2), Grapevine in 1952

(695 mi2), Lewisville in 1954 (1,660 mi2), and reservoir area (130 mi2).

48-year average of 4,630,000 acre-feet measured at USGS Trinity River at Riverside, TX, gage, which ac counted

for 941 of all area that drains into the reservoir.

Original surface areas measured from USGS 7% quads developed from 1958 photographic data.

Surface area and capacity at elevation 131.0 recalculated from original measured surface areas using Bureau

of Reclamations program .4CAP85. Used original surface areas along with surface area of 94,547 acres, at

elevation 135.0, which was measured using USGS 7% quads photoreviaed in 1972.

Values from USGS Trinity River near Crockett, TX, gage, which accounts for 841 of all area that drains into

reservoir.

• Adjusted for upstream darns reducing contributing drainage areas in 1978 and 1987, see remark #3.

• Average annual and total sediment deposits divided by 1,806,094 acre-feet (capacity at El. 131 recomputed by

ACAP85).

'° End-of-month values from USGS publications. Reservoir levels provided by Trinity River Authority.

" Includes July, Aug., and Sept. 1969 data, since normal operation of 6/26/1969.

' Surface area measured from 1972 photorevised USGS 7% quads.

48. AGENCY MAKING SURVEY Bureau of Reclamation

49, AGENCY SUPPLYING DATA Bureau of Reclamation DATE December 1992

Table 1. - Reservoir sediment data summary - Continued.

10
(1)

Elevation

(feet)

(2)

Original

Area

(acres)

(3)

Original

Capacity

(acre-feet)

(4)

Original

Adjusted

Capacity

(acre-feet)

(5)

1991

Area

(acres)

(6)

1991

Capacity

(acre-feet)

(7)

Measured

Sediment

Volume

(acre-feet)

(8)

Percent

Measured

Sediment

(9)

Percent

Reservoir

Depth

135 94,5471 2,161,742 94,547 2,097,515 64,227 100.0 -

131 (83,277)

______________

1,788,125 1,806,094 (83,277) 1,741,867 64,227 100.0 100.0

130 80,460 1,706,595 1,724,225 80,460.0 1,659,998 64,227 100.0 98.7

125 1,330,216 1,345,762 (70,190) 1,283,372 62,390 97.1 92.1

120 61,390 1,001,072 1,014,975 59,920.6 958,095 56,880 88.6 85.5

115 ______________

718,949 732,862 (50,310) 682,519 50,343 78.4 78.9

110 41,520 486,522 500,425 40,698.8 454,998 45.427 70.7 72.4

105 306,033 319,925 (29,383) 279,794 40,131 62.5 65.8

100 19,840 179,734 193,625 18,066.7 161,170 32,455 50.5 59.2

95 103,199 111,812 (11,500) 87,253 24,559 38.2 52.6

90 5,930 60,574 64,775 4,933.7 46,168 18,607 29.0 46.0

85 ______________

37,625 39,987 (3,086) 26,119 13,868 21.6 39.5

80 2,040 24,400 24,925 1,238.2 15,309 9,616 15.0 32.9

75 15,550 15,800 (1,054) 9,579 6,221 9.7 26.3

70 1,180 8,850 8,825 869.0 4,773 4,052 6.3 19.7

65 3,925 3,912 (476) 1,411 2,501 3.9 13.2

59.6 825 825 0 0 825 1.3 6.0

55 0 0 0 0 0 0 0.0 0.0

I

(1) Elevation of reservoir water surface.

(2) Original reservoir surface area, values in parentheses computed by Bureau of Reclamations program ACAP85.

(3) Original calculated reservoir capacity.

(4) Original reservoir capacity recomputed using ACAP8S from original measured surface areas and new area measured at elevation 135.

(5) Reservoir surface area from 1991 survey. Values in parentheses computed by ACAP85.

(6) 1991 calculated reservoir capacity from 1991 survey data.

(7) Measured sediment volume = column (4) - column (6).

(8) Measured sediment expressed in percentage of total sediment (64,227).

(9> Depth of reservoir expressed in percentage of total depth (76 feet).

Surface area measured from 1972 photorevised USGS 74 quads, previously used 91,000 acres, which was calculated using areas measured

at El. 130.0 and El. 140.0.

Table 2.- Summary of 1991 survey results.

'5'

555 rJ/

__

F $

lPDINTESO U REPECT 2 flU

5"

S

: i

/ \

55 1 5 5

/

/ N

'

135 s

5

5

'\ "

*:T55

N S N'-

/

N

I

'

/

c

S

N

Figure 2. - Lake Livingston range location map (1 of 2). N

15

110

100

t90

80

Lu

60

LAKE LIVINGSTON SEDIMENTATION SURVEY

liii liii I III I I 11111111 I I II

I

/

\

1991 Thalweg

- I

/

-4 / I

I

-

\ ,

/

-

' 4 I

/

A

/

I /

-

S

- 555

S

- Original Thalweg

I I I I I I I I I

50 45 40 35 30 25 20 15 10 5

MILES ABOVE AXIS OF DAM

Figure 4. - Longitudinal profile - Trinity River.

0
y4- 1

-------

0

140

130

120

110

w

w

t.L

100

z

0

F- 90

>

u-i

-J

w 80

70

60

50,

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 101

_______ ORIGINAL SURVEY 1991 SURVEY

///J

I _______________________________ _______________________________ ________________________________

I

) 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000

DISTANCE - FEET

Figure 5. - Sediment Range 101 (1 A) - Trinity River.
-------

180

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 1

_______ ORIGINAL SURVEY 199i SURVEY

160

w

w

U.. 120

140

z

0

F-

>

w

-J

w

40 Do

80

60

00 8000 10000 12000 14000 16000

DISTANCE - FEET

Figure 6. - Sediment Range 1 - Trinity River.
-------

O4-2-i99 4: 39: 36 bUREAU OF RECLAMATION PLTSYS VER i PSPLT A:LYRESOC PLOT 3

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 2

_______ ORIGINAL SURVEY 1991 SURVEY

200

180

160

u-I

LU

140

z

0

F- ______ ______ ______ ______ ______ ______ ______

>

LU

-J

LU

600 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000

DISTANCE - FEET

Figure 7. - Sediment Range 2- Triny River.
-------

140

130

120

DISTANCE - FEET

110

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 3

_______ ORIGINAL SURVEY 1991 SURVEY

80

70 - ________ ________ ________ ________ -

60 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000

Figure 8. - Sediment Range 3- Trinity River.
-------

140

130

120

ft 110

IL

80

70

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 301

_______ ORIGINAL SURVEY 1991 SURVEY

0 2 4 6 8 10 12 14 1 6 1 8 20 22 24 26 28 30 32 34

DISTANCE - FEET (1000)

Figure 9. -Sediment Range 301 (3A) -Trinity River.
-------

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 4

_______ ORIGINAL SURVEY 1991 SURVEY

8000 10000 12000 14000 16000 1

DISTANCE - FEET

00

150

140

130

120

LU

LU

U110

z

0

i-. 100

>

LU

-J

LU 90

80 -

70 -

6oo 2000

Figure 10. - Sediment Range 4- Trinity River.
-------

150

140

130

w

w

U120

w 110

100

go DO

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 5

_______ ORIGINAL SURVEY 1991 SURVEY

_____ A _

1000 2000 30 00 4000 50 00 60 00 70 00 80 00 9000 10000 11000 12000 130

DISTANCE - FEET

Figure 11. - Sediment Range 5- Kickapoo Creek.
-------

Q4-j-j9 14: 4: 5 BUREAU OF RECLAMATION PLTSYS VER I PSPLT A; LVRESOC PLOT 9

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 6

_______ ORIGINAL SURVEY 1991 SURVEY

140

130

w

ft 120

z

110

w

-J

w

100

yoc

DISTANCE - FEET

1000 2000 3000 4000 5000 6000 7000 80C

Figure 12. - Sediment Range 6- Kickapoo Creek
LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 60i

-------

cx

_______ ORIGINAL SURVEY jggj SURVEY

140

135

130

FLu

Lu

0

125 I

120 - _______ __________ __________ __________ __________ __________

Lu

I

.1

I

II

Lu ''I

115

_j 110 - ______ _________ _________ _________ _________ _________

105o 500 1000 1500 2000 2500 3000 3500 40(

DISTANCE - FEET

Figure 13. - Sediment Range 601 (6A) - Kickapoo Creek.
-------

140

130

120

Iw

LU

110

z

D

'-I

>

w

-J

w

go

80

70

00

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 7

_______ ORIGINAL SURVEY ggj SURVEY

__ __ __ __ __ __ __ __ __ --s-- __

___ ___ ___ ___ ___ ___ ___ ___ ___ - ___ ___

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 120

DISTANCE - FEET

Figure 14. - Sediment Range 7- Trinity River.
0

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 70i

_______ ORIGINAL SURVEY 1991 SURVEY

140

110

z

0

>

LU

-J

LU

90 -- ____

I'

80 __ __ __ __ __ __ __ __ __ __ __

70o 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 120 DO

DISTANCE - FEET

Figure 15. - Sediment Range 701 (7A) - Trinity River.
-------

c

04-1-199 14: 4 : p5 8UREAU OF RECLAMATION PLTSYS VER I PSPLT A: LVRESOC PLOT i3

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 8

_______ ORIGINAL SURVEY jggj SURVEY

140

130

120

ILU

LU

Li. 110

z

0

1-4

>

LU

-j

LU

go

80

70 1000 2000 3000 4000 5000 6000 7000 8000

OISTANCE - FEET

\

,\

________ ___

Figure 16. - Sediment Range 8- Triny River.
O4-1-i993 14: 4 : 16 BUREAU OF RECLAMATION PLTSYS YEA I PSPLT A; LYRESOC PLOT j4

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 9

_______ ORIGINAL SURVEY iggi SURVEY

140

130

120

uJu-i

t.L 110

z

0

I;

>

w

-Ju-i

go ___________ ___________ ___________ ______

80

DISTANCE - FEET

I '

lk ,f

I,

1000 2000 30 00 4000 5000 6000 7000 BOC

Figure 17. - Sediment Range 9-Trinity River.
-------

C3

p4--j99 j4: 42: 48 BUREAU OF RECLAMATION PLTSYS VER I PSPLT A: LYRESOC PLOT 15

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 10

_______ ORIGINAL SURVEY 1991 SURVEY

140

130

120

LU

LU

110

0

1-4

I- _____ _____ _____ _____ _____ _____ _____ _____ _____ _____

>

LU

-J

Lii

go

80

70o 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500

DISTANCE - FEET

-S -

, I

______ ______

'I

1

Figure 18. - Sediment Range 10- Trinity River.
U4

-------

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION Ii

_______ ORIGINAL SURVEY II SURVEY

140

130 _ _ _ _ _

120

Ui

Ui

110

z

0

1-4

>

Ui

-J

Ui

go - ________ ________ ________ ________ _______ _______ ________ _______ _______ _______

80 - - ________ ________ ________ ________ _______ _______ ________ ________ _______ _______

A

70o 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 110 )0

DISTANCE - FEET

Figure 19. - Sediment Range 11 - Triny River.
uu- -

-------

150

140

130

w

LU

120

z

0

I-

>

LU

-J

Ui

100

go

Qq;

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 12

_______ ORIGINAL SURVEY 1991 SURVEY

____ _

00 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500

DISTANCE - FEET

Figure 20. - Sediment Range 12- White Rock and Caney Creeks.
-------

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 121

_______ ORIGINAL SURVEY jggj SURVEY

140

135

130

110

105 - _______ - ___________ ___________ ___________ ___________ ___________ ___________

1000 1000 öoo 3000 4000 5000 6000 7000 80( 0

DISTANCE - FEET

Figure 21.- Sediment Range 121 (12A)- Caney Creek.
tJ4 1

140

135

130

w

uJ

125

z

0

I-

>

w

-J

w

115

110

105

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 122

_______ ORIGINAL SURVEY jggj SURVEY

) 1000 2000 3000 4000 5000 6000 7000 8000 9000

DISTANCE - FEET

Figure 22. - Sediment Range 122 (1 2B) - White Creek.
-------

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 13

_______ ORIGINAL SURVEY 1991 SURVEY

140

130

120

1-

w

w

IL 110 - ________ __________ _________ _________ _________

z

0

'-4

100

>

w

-j

LU

go

80

11

9ooo 0 1000 2000 3000 4000 5000 6000 70(

DISTANCE - FEET

Figure 23. - Sediment Range 13- Triny River.
-------

140

130

120

w

w

1

110

W 100

go

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 14

ORIGINAL SURVEY 1991 SURVEY

800

\

-

-

-

/

J \ 1

- v- ___

___________________________ ____________________________ * ____________________________ ____________________________

uuu auu dUUU uu iouo bOU 4000 4500 5000 5500

DISTANCE - FEET

Figure 24. -Sediment Range 14-Trinity River.
-------

C

O4-12-199 14: 46 : 14 BUREAU OF RECLAMATION PLTSYS VER I PSPLT A ; LVRESOC PLOT 24

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION i5

_______ ORIGINAL SURVEY 1991 SURVEY

140

130

120

I.-

Ui

Ui

IL

110

Ui 100

go

80( 00

OISTANCE - FEET

II

) 1000 2000 3000 4000 5000 6000 7000 80 00 9000 10000 11000 120 00 130

Figure 25. - Sediment Range 15- Trlny River.
-------

O-1-199 14: 4/; O BUREAU OF RECLAMATION PLTSYS VER I PSPLT A: LVRESOC PLOT 25

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 16

_______ ORIGINAL SURVEY 1991 SURVEY

140

130

J- -

120

(JJ

w

tj

110 - -___

LU 100 _____ ____ - - ___

go ____________ ______ ______ ______

80o 500 1000 1500 2000 2500 3000 3500 4000 4500 5000

DISTANCE - FEET

Figure 26. - Sediment Range 16- Trinity River.
uq-

-------

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION i7

_______ ORIGINAL SURVEY 1991 SURVEY

140

130____ __ __ __

:L ___ ______ __ _________ 'I

80 ______ ______ ______ ____ ______ ______ ______

70o 1000 2000 3000 4000 5000 6000 7000 80( 0

DISTANCE - FEET

Figure 27. - Sediment Range 17- Trinity River.
v- CF

-------

150

140

130

Fu-I

LU

LL 120

z

0

Ii

F-

>

LU

-J

LU

100

go

80

LAKE LIVINGSTON SEDIMENT CROSS SECTIONS

GROUND PROFILE FOR SECTION 18

_______ ORIGINAL SURVEY 1991 SURVEY

1000 2000 3000 4000 000 A00O 7000

DISTANCE - FEET

Figure 28. - Sediment Range 18- Triny River.
WIDTH ADJUSTMENT METHOD FOR REV/SING

CONTOUR AREAS IN COMPUTATION OP

RESERVOIR SEDIMENTATION

Schematic Segment

of Reservoir

mit/cl Survey New Survey

Contour Area 4, * Contour Area (Computed)

Downstream Width W,' Downstream Width

Upstream Width w," Upstream Width

I II

41x40(/2

0I0lI

2

Figure 29. - Wkith adjustment method for revising contour areas.

44

Sediment Range
AREA (100 ACRES)

140

135

130

125

120

115

110

U

lii

z

D

>

Li

Li

80

75

70

65

60

55

50

1000 800 600 400 200 U

i __ __________ _____

/CAPACITI _________ _

i 1 ____- -

LEGEND

.

F 1991 SURVEY ___________ ______________

ORIGINAL SURVEY

n cnn mon icon 2000 251

CAPACITY (1000 ACRE-FELT)

Figure 30. -Area and capacity curves -Lake Livingston.