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.
B f R l iureau o ec amat on
Denver Office 11. CONTRACT OR GRANT NO.
D CO 802enver 25 13. TYPE OF REPORT AND PERIOD COVERED
12. SPONSORING AGENCY NAME AND ADDRESS
DIBRSame
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
1Introduction
2Summary and conclusions
2Description of basin
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
8References
TABLES
Table
91 Reservoir sediment data summary
112 Summary of 1991 survey results
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
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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 DISTRIBUTIONI
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 of inflow, 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 of Engineers, 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'
TE 10. STORAGE
ALLOCATION
11. ELEVATI
TOP OF POOL
ON 2. ORIGINAL
SURFACE AREA, Ac
13. ORIGINALCAPACITY, Al 4. GROSS STORAGEACRE- FEET 15. DATE
STORAGE
BEGANa. 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 MILEST
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/IU 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 0.35D
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 125PERCENT 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 accountedfor 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 intoreservoir.
• 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 5 51 /
N/
'
135 s
5
5
'\ " *:T55
S N'-N /
N
I
' /
c
S
N
NFigure 2. - Lake Livingston range location map (1 of 2).
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
/
I-4 /
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
ww
t.L
100
z
0
F- 90
>u-i
-Jw
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
ww
U.. 120
140
z
0
F-
>w
-Jw
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-ILU
140
z0
F- ______ ______ ______ ______ ______ ______ ______
>LU
-JLU
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
U-
110
z
0
i-. 100
>
LU
-J
LU 90
80 -
70 -
6oo 2000
Figure 10. - Sediment Range 4- Trinity River.
-------
150
140
130
ww
U-
120
w 110
100
go DO
LAKE LIVINGSTON SEDIMENT CROSS SECTIONS
GROUND PROFILE FOR SECTION 5
_______ ORIGINAL SURVEY 1991 SURVEY
___ A__ _
1000 2000 3000 4000 5000 6000 7000 8000 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
wft
120
z
110w
-Jw
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
F-
Lu
Lu
125 I
0
120 - _______ __________ __________ __________ __________ __________
I
Lu .1
I IILu ''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
I-w
LU
110
z
D
'-I
>w
-Jw
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
z0
>LU
-JLU
90 -- ____
I'
80 __ __ __ __ __ __ __ __ __ __ __
70o 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 120DO
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
I-
LULU
Li. 110
z0
1-4
>LU
-jLU
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
z0
I;
>w
-Ju-i
go ___________ ___________ ___________ ______
80
DISTANCE - FEET
I 'l fk,
I,
1000 2000 3000 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
LULU
110
0
1-4I-
_____ _____ _____ _____ _____ _____ _____ _____ _____ _____
>LU
-JLii
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
wuJ
125
z
0
I-
>w
-Jw
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
- ________ __________ _________ _________ _________
z0
'-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
ww
1
110
W 100
go
LAKE LIVINGSTON SEDIMENT CROSS SECTIONS
GROUND PROFILE FOR SECTION 14
ORIGINAL SURVEY 1991 SURVEY
800
\
-
-
-/J
\ 1v-- ___
___________________________ ____________________________ * ____________________________ ____________________________
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
120I.-
UiUi
IL
110
Ui 100
go
80( 00
OISTANCE - FEET
II
) 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 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
(JJw
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____ __ __ __
'I:L ___ ______ __ _________
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
F-u-I
LULL
120
z
0Ii
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/SINGCONTOUR 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
/241x40(
0I0lI
2
Figure 29. - Wkith adjustment method for revising contour areas.
44
Sediment Range
AREA (100 ACRES)
140
135
130
125
120
115
110
Ulii
zD
>Li
Li
80
75
70
65
60
55
50
1000 800 600 400 200 U
i _____ _______ _____
/CAPACITI ___ _______
1i - -____
LEGEND
.
F 1991 SURVEY
_________________________
ORIGINAL SURVEY
n cnn mon icon 2000 251
CAPACITY (1000 ACRE-FELT)
Figure 30. - Area and capacity curves - Lake Livingston.