U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
mm LAKE
BANDERA AND MEDINA COUNTIES
TEXAS
EPA REGION VI
WORKING PAPER No, 652
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•&G.P.O. 699-440
-------
REPORT
ON
MEDINA LAKE
BANDERA AND MEDINA COUNTIES
TD(AS
EPA REGION VI
WORKING PAPER No, 652
WITH THE COOPERATION OF THE
TEXAS WATER QUALITY BOARD
AND THE
TEXAS NATIONAL GUARD
FEBRUARY/ 1977
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CONTENTS
Page
Foreward ii
List of Texas Study Reservoirs iv
Lake and Drainage Area Map vi
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 4
IV. Nutrient Loadings 10
V. Literature Reviewed 15
•VI. Appendices 16
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n
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to freshwater lakes and
reservoirs.
OBJECTIVES
The .Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is. formatted to provide state environmental
agencies with specific information for basin planning [§303(e)], water
quality criteria/standards review [§303(c)], clean lakes [§314(a,b)j,
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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Ill
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation's
fresh water lakes. Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.
ACKNOWLEDGEMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Texas Water Quality Board
for professional involvement, to the Texas National Guard for
conducting the tributary sampling phase of the Survey, and to
those Texas wastewater treatment plant operators who voluntarily
provided effluent samples.
Hugh C. Yantis, Jr., Executive Director of the Texas Water
Quality Board, and John B. Latchford, Jr., Director, and the staff
of the Field Operations Division provided invaluable lake documen-
tation and counsel during the Survey, reviewed the preliminary
reports, and provided critiques most useful in the preparation of
this Working Paper series.
Major General Thomas Bishop, the Adjutant General of Texas,
and Project Officer Colonel William L. Seals, who directed the
volunteer efforts of the Texas National Guardsmen, are also grate-
fully acknowledged for their assistance to the Survey.
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iv
NATIONAL EUTROPHICATION SURVEY
STUDY RESERVOIRS
State of Texas
NAME
Amistad
Bastrop
Bel ton
Braunig
Brownwood
Buchanan
Caddo
•
Calaveras
Canyon
Colorado City
Corpus Christi
Diversion
Eagle Mountain
Fort Phantom Hill
Houston
Kemp
Lake O'The Pines
Lavon
Lewisvilie (Garza-Little Elm)
Livingston
COUNTY
Val Verde
Bastrop
Bell, Coryell
Bexar
Brown
Burnet, Llano
Harrison, Marion, TX;
Caddo Parish, LA
Bexar
Comal
Mitchell
Jim Wells, Live Oak, San
Patricio
Archer, Baylor
Tarrant, Wise
Jones
Harris
Baylor
Camp, Marion, Morris,
Upshur
Coll in
Denton
Polk, San Jacinto, Trinity,
Walker
-------
Lyndon B. Johnson
Medi na
Meredith
0. C. Fisher (San Angelo)
Palestine
Possum Kingdom
Sam Rayburn
Somerville
E. V. Spence
Stamford
Still house Hollow
Tawakoni
Texoma
Travis
Trinidad
Twin Buttes
White River
Whitney
Wright Patman (Texarkana)
Burnet, Llano
Bandera, Medina
Hutchinson, Moore,
Potter
Tom Green
Anderson, Cherokee,
Henderson, Smith
Palo Pinto, Stephens,
Young
Angelina, Jasper
Nacogdoches, Sabine, San
Augustine
Burleson, Lee, Washington
Coke
Haskell
Bell
Hunt, Rains, Van Zandt
Cooke, Grayson TX; Bryan,
Johnston, Love, Marshall, OK
Burnet, Travis
Henderson
Tom Green
Crosby
Bosque, Hill
Bowie, Cass
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MEDINA LAKE
^ Tributary Sampling Site
X Lake Sampling Site
J Sewage Treatment Facility
^> Drainage Area Boundary
0 5 K> Km.
4 ~~5 Mi.
Scale
K30
I
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MEDINA LAKE
STORET NO. 4822
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Medina Lake is meso-eutrophic; i.e.,
moderately well supplied with nutrients and productive. Whether
nutrient enrichment is beneficial or deleterious depends on the
actual or potential effect on the uses of the lake. In this
regard, no nuisance conditions are known to personnel of the
Texas Water Quality Board and there is little or no known impair-
ment of the designated beneficial uses of the lake.
Although it ranked sixteenth in overall trophic quality when
the 39 Texas reservoirs sampled in 1974 were compared using a com-
bination of six water quality parameters*, the lower ranking of
this water body is largely due to the high median inorganic nitro-
gen which does not necessarily indicate trophic quality in this
case because the lake is phosphorus limited. None of the other
reservoirs had less but one had the same median total phosphorus,
none of the others had less median dissolved orthophosphorus, all
of the other reservoirs had less median inorganic nitrogen, 24 had
less mean chlorophyll £, and four had greater mean Secchi disc
transparency. Marked depression or depletion of hypolimnetic
dissolved oxygen occurred at all sampling stations in May and
August and at three of the four stations in November.
Survey limnologists did not observe macrophytes or surface con-
centrations of algae.
* See Appendix A.
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B. Rate-Limiting Nutrient:
The algal assay results indicate Medina Lake was phosphorus
limited at the time the sample was collected (11/05/74). The
lake data indicate phosphorus limitation at all sampling stations
and times.
C. Nutrient Controllability:
1. Point sources—During the sampling year, known point
sources contributed 43.6% of the total phosphorus load to Medina
Lake. The wastewater treatment plant at Bandera accounted for an
estimated 39.3% of the total, and septic tanks serving lakeshore
dwellings accounted for an estimated 4.3%.
The present phosphorus loading of 0.13 g/m2/year is less than
that proposed by Vollenweider (Vollenweider and Dillon, 1974) as
an oligotrophic loading (see page 14). However, the lake is phos-
phorus limited, and any reduction in point-source loads could be
considered a means of maintaining the present quality of the lake.
2. Non-point sources—Non-point sources accounted for 56.4%
of the total phosphorus load. The Medina River contributed 29.7%
and Red Bluff Creek contributed 3.5%. The ungaged minor tribu-
taries and immediate drainage contributed an estimated 9.5%.
The phosphorus export rates of the Medina River and Red Bluff
Creek were quite low during the sampling year (<1 kg/km2).
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
A. Lake Morphometry :
1. Surface area: 22.56 kilometers2.
2. Mean depth: 13.9 meters.
3. Maximum depth: >36.3 meters.
4. Volume: 313.306 x 106 m3.
5. Mean hydraulic retention time: 2.7 years (based on outflow).
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)ttt (m3/sec)ttt
Medina River 1,227.7 3.510
Red Bluff Creek 145.8 0.310
Minor tributaries &
immediate drainage - 246.0 0.670
Totals 1,619.5 4.490
2. Outlet -
Medina River 1,642.1* 3.671**
C. Precipitation***:
1. Year of sampling: 94.0 centimeters.
2. Mean annual: 70.0 centimeters.
t Table of metric conversions—Appendix B.
tt LiJtchford, 1974.
ttt For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
* Includes area of lake.
** Outlet flow adjusted to equal sum of inlet flows minus evaporation (see
page 10).
*** See Working Paper No. 175.
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III. LAKE WATER QUALITY SUMMARY
Medina Lake was sampled four times in 1974 by means of a pontoon-
equipped Huey helicopter. Each time, samples for physical and chemical
parameters were collected from a number of depths at four stations on
the lake (see map, page vi). During each visit, a single depth-integrated
(4.6 m to surface) sample was composited from the stations for phytoplank-
ton identification and enumeration; and during the last visit, a single
18.9-liter depth-integrated sample was composited for algal assays. Also
each time, a depth-integrated sample was collected from each of the
stations for chlorophyll a^ analysis. The maximum depths sampled were
36.3 meters at station 1, 30.2 meters at station 2, 26.8 meters at station
3, and 14.6 meters at station 4.
The sampling results are presented in full in Appendix D and are
summarized in the following table (the August nutrient samples were
not properly preserved and were not analyzed).
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PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNDCTVY (MCHOMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P (MG/L)
N02*N03 (MG/D
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (UO./D
SECCHI (METERS)
A. SUMMftHY OF HTIYSICAL AND
1ST SAMPLING ( 3/12/74)
4 SITES
RANGE
10.8 - 19.5
4.2 - 9.6
345. - 420.
7.6 - 8.1
175. - 197.
0.006 - 0.021
MEAN MEDIAN
15.1 15.8
8.0 8.8
374. 373.
7.9 8.0
186. 187.
0.008 0.007
0.003 - 0.008
0.610 - 0.720
0.020 - 0.120
0.004 0.004
0.660 0.660
0.048 0.045
0.200 - 0.400 0.242 0.200
0.640 - 0.750 0.701 0.710
0.840 - 1.100
1.7 - 2.9
2.4 - 3.4
0.902 0.885
2.4 2.5
2.7 2.b
CHEMICAL CHAKACTEMISTICS FOK MEDINA LAKE
STORET COOE 4822
2ND SAMPLING ( 5/22/74)
4 SITES
RANGE
12.3 - 27.4
0.1 - 8.0
365. - 455.
7.3 - 8.3
149. - 192.
0.006 - 0.162
0.002 - 0.008
MEAN MEDIAN
21.9 25.2
5.0
425.
7.5
4.6
416.
7.7
165. 155.
0.020 0.009
0.003 0.003
0.585 0.570
0.020 - 0.070 0.037 0.035
0.200 - 0.500 0.229 0.200
0.621 0.605
0.814 0.790
42.3 51.7
0.520 - 0.690
0.560 - 0.710
0.740 - 1.040
3.3 - 62.6
1.1 - 2.4
3RD SAMPLING ( 8/15/74)
4 SITES
KANGE
12.4 - 29.0
0.0 - 7.8
367. - 473.
7.5 - 8.4
OOOOOO _«»«»«»*O«««««O«««ft««»»
MEAN
23.0
4.1
416.
8.0
MEDIAN
26.5
5.0
417.
8.0
1.9
2.0
O»0OO0
OOOOOO
OOOOOO
OOOOOO
o«00o0
OOOOOO
2.4
1.4
..OOO0O0OOOO000O00OOOOOO
- tHHHHJO O OO1> OO O O O OOOO O O O
-O0OO0OOO00O0OOO0O0OO0O
-OOOOOOOOOOOOOOOOOOOOOO
-0OOOOOO000O00OOO o 00000
-.0000000000000000000000
- 7.3 4.9 4.9
- 3.7 2.6 2.7
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A. SUMMAKY OF PHYSICAL AND CHEMICAL CHARACTER 1ST ICS FUK MEDINA LAKE
STORET CODE
PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNOCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P (MG/L)
N02+N03 (MG/L>
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (U(VL>
SECCHI (METERS)
4TH SAMPLING
5/74)
4 SITES
RANGE MEAN
13.3
0.0
366.
7.3
146.
0.008
0.002
0.020
0.020
0.200
0.280
0.440
1.6
1.2
- 21.1
8.0
- 395.
8.1
- 201.
- 0.043
- 0.015
- 0.400
- 0.690
- 0.900
- 0.710
- 0.920
2.7
3.4
19.4
5.5
37b.
7.9
161.
0.015
0.007
0.223
0.119
0.326
0.342
0.549
2.1
2.5
MEDIAN
20.7
7.4
375.
8.0
151.
0.012
0.005
0.260
0.040
0.200
0.300
0.490
2.1
2.7
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B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
03/12/74
05/22/74
08/15/74
11/05/74
Dominant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
4,
5.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Dinobryon SJD.
Chroomonas sp.
Coelastrum sp.
Fragilaria sp.
Cyclotella sp.
Other genera
Total
Microcystis (?) sp.
Fragilaria sp.
Coelastrum sp.
Cyclotella sp.
Cnlorophytan filaments
Other genera
Total
Microcystis s£.
Chlorophytan filaments
Scenedesmus s£.
Chroomonas SJD.
Cyclotella sp.
Other genera
Total
Cryptumonas sp.
Apnanothece s£.
Closterium sp.
Dactyl ococcops is sp.
Flagellates
Algal Units
per ml
1,320
543
31
272
233
427
3,106
607
580
359
193
166
663
2,5(-.8
590
461
264
19
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2. Chlorophyll a -
Sampling
Date
03/12/74
05/22/74
08/15/74
11/05/74
Station
Number
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P
Cone, (mg/1)
Inorganic N
Cone, (mg/1)
2.
Chlorophyll a
(yg/D
2.8
2.2
2.9
1.7
3.3
62.6
62.6
40.9
6.6
7.3
2.4
3.3
2.5
1.6
1.7
2.7
Maximum yield
(mg/1-dry wt.)
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates that the potential primary productivity
0.005
0.055 .
0.055
0.005
0.313
0.313
1.313
1.313
0.1
8.3
16.8
0.1
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of Medina Lake was low at the time the sample was collected
(11/05/74). Also, the significant increase in yield with
the addition of phosphorus alone indicates that the lake
was phosphorus limited at that time. Note that the addition
of nitrogen alone resulted in a yield no greater than that of
the control. s
The lake data indicate phosphorus limitation as well. The
mean inorganic nitrogen/orthophosphorus ratios were 40/1 or
greater at all sampling stations and times, and phosphorus
limitation would be expected.
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10
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Texas National
Guard collected monthly near-surface grab samples from each of the
tributary sites indicated on the map (page vi), except for the high
runoff months of April and May when two samples were collected.
Sampling was begun in September, 1974, and was completed in August,
1975.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the Texas District Office of the U.S. Geological Survey for the
tributary sites nearest the lake. Outlet flow was adjusted to equal
the sum of the inlet flows minus the yearly evaporation rate (an
undetermined amount of water flows from the lake into the Edwards and
Balconnes fault zone, part of which is above and part is below the
lake; Yost, 1976).
In this report, nutrient loads for sampled tributaries were
calculated using mean annual concentrations and mean annual flows.
Nutrient loads shown are those measured minus point-source loads, if any.
Nutrient loads for unsampled "minor tributaries and immediate
drainage" ("II" of U.S.G.S.) were estimated using the mean concentrations
in the West Prong, Medina River at station D-l and the mean annual II
flow.
The operator of the wastewater treatment plant at Bandera did not
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11
participate; therefore, nutrient loads were estimated at 1.134 kg P and
3.401 kg N/capita/year, and flows were estimated at 0.3785 m3/capita/day.
A. Waste Sources:
1. Known municipal* -
Pop. Mean Flow Receiving
Name Served Treatment (m3/d_) Water
Bandera 1,000 contact aer. 378.5 Medina River
2. Known industrial - None
* Anonymous, 1971.
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12
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source yr total
a. Tributaries (non-point load) -
Medina River 855 29.7
Red Bluff Creek 100 3.5
b. Minor tributaries & immediate
drainage (non-point load) - 275 9.5
c. Known municipal STP's -
Bandera 1,135 39.3
d. Septic tanks* - 125 4.3
e. Known industrial - None
f. Direct precipitation** - 395 13.7
Total 2,885 100.0
2. Outputs -
Lake outlet - Medina River 1,160
3. Net annual P accumulation - 1,725 kg.
* Estimate based on 445 lakeshore dwellings, see Working Paper No. 175.
** See Working Paper No. 175.
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13
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source y_r total
a. Tributaries (non-point load) -
Medina River 141,940 67.5
Red Bluff Creek 19,160 9.1
b. Minor tributaries & immediate
drainage (non-point load) - 16,820 8.0
c. Known municipal STP's -
Bandera 3,400 1.6
d. Septic tanks* - 4,745 2.2
e. Known industrial - None
f. Direct precipitation** - 24,355 11.6
Total 210,420 100.0
2. Outputs -
Lake outlet - Medina River 87,290
3. Net annual N accumulation - 123,130 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Medina River <1 116
Red Bluff Creek <1 131
* Estimate based on 445 lakeshore dwellings, see Working Paper No. 175.
** See Working Paper No. 175.
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14
E. Mean Nutrient Concentrations in Ungaged Streams:
Mean Total P Mean Total N
Tributary Cone, (mg/1) Cone, (mg/1)
Elm Creek O.O'IO 3.444
West Prong, Medina River 0.013 0.796
F. Yearly Loads:
In the following table, the existing phosphorus loadings
are compared to those proposed by Vollenweider (Vollenweider
and Dillon, 1974). Essentially, his "dangerous" loading is
one at which the receiving water would become eutrophic or
remain eutrophic; his "permissible" loading is that which
would result in the receiving water remaining oligotrophic
or becoming oligotrophic if morphometry permitted. A meso-
trophic loading would be considered one between "dangerous"
and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with short hydraulic retention times.
Total Phosphorus Total Nitrogen
Total Accumulated Total Accumulated
grams/m2/yr 0.13 0.08 9.3 5.5
Vollenweider phosphorus loadings
(g/mVyr) based on mean depth and mean
hydraulic retention time of Medina Lake:
"Dangerous" (eutrophic loading) 0.44
"Permissible" (oligotrophic loading) 0.22
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15
V. LITERATURE REVIEWED
Anonymous, 1971. Inventory of municipal waste facilities. EPA
Publ. OWP-1, vol. 6, Wash., DC.
Latchford, John B., Jr., 1974. Personal communication (lake mor-
phometry). TX Water Qual. Bd., Austin.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research.
Natl. Res. Council of Canada Publ. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
Yost, I. D., 1976. Personal communication (hydrologic budgets of
Texas reservoirs). U.S. Geol. Surv., Austin.
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16
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
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LAKE
CODE LAKE NAME
4801 AMISTAD LAKE
4802 BASTROP LAKE
4803 BELTON RESERVOIR
4804 BRAUNIG LAKE
4805 BROWNWOOD LAKE
4806 LAKE BUCHANAN
4807 CAODO LAKE
4808 CALAVERAS LAKE
4809 CANYON RESERVOIR
4810 LAKE COLORADO CITY
4811 CORPUS CRISTI LAKE
4812 DIVERSION LAKE
4813 EAGLE MOUNTAIN LAKE
4814 FT PHANTOM HILL LAKE
4815 GARZA LITTLE ELM RESERVO
4816 KEMP LAKE
4817 HOUSTON LAKE
4818 LAKE OF THE PINES
4819 LAVON RESERVOIR
4820 LIVINGSTON LAKE
4821 LYNDON B JOHNSON LAKE
4822 MEDINA LAKE
4823 LAKE MEREDITH
4824 PALESTINE LAKE
4825 POSSUM KINGDOM RESERVOIR
4826 SAN ANGELO RESERVOIR
4827 SAM RAYBURN RESERVOIR
4828 E V SPENCE RESERVOIR
MEDIAN
TOTAL P
0.013
0.02?
0.016
0.134
0.027
0.036
0.055
0.038
0.010
0.042
0.113
0.025
0.024
0.060
0.045
0.023
0.097
0.031
0.063
0.196
0.042
0.010
0.021
0.031
0.023
0.098
0.029
0.036
MEDIAN
INOWG N
0.500
0.090
0.185
0.150
0.100
0.250
0.070
0.060
0.450
0.090
0.130
0.060
0.070
0.105
0.380
0.110
0.260
0.090
0.180
0.555
0.420
0.600
0.070
0.180
0,070
0.140
0.150
0.080
500-
MEAN SEC
371.474
419.917
378.312
461.625
470.375
437.625
463.333
461.667
384.812
473.625
475.187
470.111
469.625
474.909
475.782
455.000
486.187
440.000
485.333
465.469
456.500
403.562
439.312
442.625
419.045
481.000
439.458
462.583
MEAN
CHLORA
2.0^2
12.392
8.025
22.762
4.887
8.606
14.808
22.500
2.500
12.675
19.756
15.867
5.662
6.317
14.156
10.217
16.650
12.919
5.400
16.112
8.100
12.944
3.037
10.619
9.495
24.675
6.267
11.775
15-
MIN DO
14.900
15.000
15.000
14.800
14.400
15.000
11.400
13.000
14.800
10.200
14.000
9.000
11.000
9.800
14.600
10.400
12.400
15.000
8.800
15.000
14.900
15.000
14.400
14.800
15.000
10.200
15.000
15.000
MEDIAN
DISS ORTHO H>
0.009
0.007
0.007
0.062
0.007
0.012
0.013
0.007
0.006
0.012
0.050
0.009
0.008
0.022
0.018
0.007
0.036
0.011
0.018
0.128
0.013
0.004
0.009
0.010
0.009
0.011
0.009
0.008
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
4829 SOMEHVILLE LAKE
4830 STAMFORD LAKE
4631 STILLHOUSE HOLLOW RESEKV
4832 TAWAKONI LAKE
4833 TEXARKANA LAKE
4834 TEXOHA LAKE
4835 TRAVIS LAKE
4836 TRINIDAD
4837 TWIN BUTTES RESERVOIR
4838 WHITE RIVER RESERVOIR
4839 WHITNEY LAKE
MEDIAN
TOTAL P
0.053
0.073
0.018
0.046
0.106
0.042
0.018
0.389
0.029
0.020
0.028
MEDIAN
1NORG N
0.115
O.C60
0.160
0.100
0.120
0.160
0.250
0.110
0.250
0.110
0.120
500-
MEAN 5EC
473.833
482.714
406.250
466.417
478.500
451.321
389.913
479.500
454.917
434.500
430.500
ML. AN
CHLORA
24.491
18.457
3.917
18.246
19.119
12.493
5.595
24.300
8.708
4.333
6.912
lb-
MIN DO
13.000
10.600
15.000
13.200
12.400
15.000
15.000
10.000
14.800
15.000
15.000
MEDIAN
DISS 0*TnO P
0.013
0.012
0.010
0.013
0.030
0.018
0.007
0.240
0.009
0.009
0.008
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES aim
LAKE
CODE LAKE NAME
4801 AMISTAO LAKE
4802 BASTROP LAKE
4803 8ELTON RESERVOIR
4804 BRAUNIG LAKE
4805 BROrfNWOOD LAKE
4806 LAKE BUCHANAN
4807 CADDO LAKE
4808 CALAVERAS LAKE
4809 CANYON RESERVOIR
4810 LAKE COLORADO CITY
4811 CORPUS CRIST I LAKE
4812 DIVERSION LAKE
4813 EAGLE MOUNTAIN LAKE
4814 FT PHANTOM HILL LAKE
4815 GARZA LITTLE ELM RESERVO
4816 KEMP LAKE
4817 HOUSTON LAKE
4818 LAKE OF THE PINES
4819 LAVON RESERVOIR
4820 LIVINGSTON LAKE
4831 LYNDON B JOHNSON LAKE
4832 MEDINA LAKE
4833 LAKE MEREDITH
4834 PALESTINE LAKE
4835 POSSUM KINGDOM RESERVOIR
4836 SAN ANGELO RESERVOIR
4837 SAM RAYBURN RESERVOIR
4fl38 E V SPENCE RESERVOIR
MEDIAN
TOTAL P
95
79
92
5
66
47
26
45
99
39
8
68
71
34
34
76
16
54
21
3
39
99
82
54
74
13
59
50
( 36)
( 30)
< 35)
( 2)
( 25)
( 18)
( 10)
( 17)
( 37)
( 14)
( 3)
< 26)
( 27)
( 9)
( 13)
< 29)
( 6)
( 20)
( 8)
( 1>
( 14)
< 37)
( 31)
( 20)
( 28)
< 5)
( 22)
( 19)
MEDIAN
INORG N
5
76
26
42
70
21
91
100
8
76
47
83
91
66
13
61
16
76
29
3
11
0
91
32
91
45
39
83
( 2)
( 28)
( 10)
( 16)
( 26)
( 7)
( 33)
( 38)
< 3)
( 28)
( 18)
( 31)
( 33)
( 25)
( 5)
(22)
( 6)
( 28)
( 11)
( 1)
( 4)
( 0)
( 33)
I 12)
( 33)
( 17)
( 15)
(31)
500-
MEAN SEC
100
82
97
50
29
74
42
47
95
26
18
32
34
21
16
55
0
66
3
39
53
89
71
63
84
8
68
45
( 38)
( 3D
( 37)
( 19)
( 11)
( 28)
( 16)
( 18)
( 36)
( 10)
( 7)
( 12)
( 13)
( 8)
( 6)
< 21)
( 0)
( 35)
( 1)
( 15)
( 20)
( 34)
< 37)
( 24)
( 32)
( 3)
( 26)
( 17)
MEAN
CHLOHA
100
47
68
8
87
63
32
11
97
42
13
29
79
74
34
55
24
39
84
26
66
37
95
53
58
0
76
50
( 38)
( 18)
( 26)
( 3)
( 33)
( 24)
( 12)
( 4)
( 37)
I 16)
( 5)
( 11)
( 30)
( 28)
( 13)
( 21)
( 9)
< 15)
( 32)
( 10)
( 25)
( 14)
( 36)
( 20)
( 22)
< 0)
( 29)
( 19)
15-
MIN DO
39
17
17
49
58
17
76
67
49
88
61
97
79
95
55
84
72
17
100
17
39
17
39
49
17
88
17
17
( 14)
( 0)
( 0)
( 17)
( 22)
( 0)
( 29)
( 25)
( 17)
( 33)
( 23)
( 37)
( 30)
( 36)
( 21)
( 32)
( 27)
( 0)
( 38)
( 0)
( 14)
( 0)
( 14)
( 17)
( 0)
( 33)
( 0)
( 0)
MEDIAN
OISS OHTHO P
63
92
84
5
84
39
30
92
97
39
8
63
76
16
21
92
11
46
21
3
30
100
63
51
63
46
63
76
( 21)
( 34)
( 31)
( 2)
( 31)
( 14)
( 10)
( 34)
( 37)
( 14)
( 3)
( 21)
( 28)
( 6)
( 7)
( 34)
( 4)
( 17)
( 7)
( 1)
( 10)
( 38)
( 21)
( 19)
( 21)
( 17)
( 21)
( 28)
INDEX
NO
40
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
4829 SOMERVILLE LAKE
4830 STAMFORD LAKE
4831 STILLHOUSE HOLLOW RESEHV
4832 TAWAKONI LAKE
4833 TEXARKANA LAKE
4834 TEXOMA LAKE
4835 TRAVIS LAKE
4836 TRINIDAD
4837 TWIN BUTTES RESERVOIR
4838 WHITE RIVER RESERVOIR
4839 WHITNEY LAKE
MEDIAN
TOTAL P
29
18
88
32
11
39
88
0
59
84
63
( 11)
( 7)
( 33)
( 12)
( 4>
( 14)
( 33)
( 0)
( 22)
( 32)
( 24)
MEDIAN
INORG N
55
97
37
70
51
34
21
61
21
61
51
( 21)
( 37)
( 14)
( 26)
( 19)
( 13)
( 7)
( 22)
( 7)
< 22)
( 19)
500-
MEAN SEC
24
5
87
37
13
61
92
11
58
76
79
( 9)
( 2)
( 33)
( 14)
( 5)
( 23)
< 35)
( 4)
( 22)
( 29)
( 30)
MEAN
CHLORA
3
18
92
21
16
45
82
5
61
89
71
( 1)
( 7)
( 35)
( 8)
( 6)
( 17)
( 3D
( 2)
( 23)
( 34)
( 27)
15-
MIN DO
67
82
17
63
72
17
17
92
49
17
17
.< 25)
( 31)
( 0)
( 24)
( 27)
( 0)
( 0)
( 35)
< 17)
( 0)
< 0)
MEDIAN
DISS 0*THO P
30 (
39 (
51 (
30 (
13 f
21 (
84 (
0 (
63 (
63 (
76 (
10)
14)
19)
10)
5)
7)
31)
0)
21)
21)
28)
INDEX
NO
200
259
372
2b3
176
217
384
169
311
390
357
-------
CS RANKED BY INOEX NOSr
RANK LAKE CODE LAKE NAME INDEX NO
i 4809 CANYON RESERVOIR 445
? 4333 LAKE MEREDITH <»41
3 4813 EAGLE MOUNTAIN LAKE 430
4 4816 KEMP LAKE 423
5 4801 AMISTAO LAKE 402
6 4805 BROrfNWOOD LAKE 394
7 4802 BASTRUP LAKE 393
8 4838 WHITE RIVEH RESERVOIR 390
9 4825 POSSUM KINGDOM RESERVOIR 387
10 4835 TRAVIS LAKE 384
11 4803 BELTON RESERVOIR 384
12 4831 STILLHOUSE HOLLOW RESERV 372
13 4812 DIVERSION LAKE 372
14 4808 CALAVERAS LAKE 362
15 4839 WHITNEY LAKE 357
16 4822 MEDINA LAKE 342
17 4827 SAM RAYBURN RESERVOIR 322
18 482B E V SPENCE RESERVOIR 321
19 4837 TWIN BUTTES RESERVOIR 311
20 4810 LAKE COLORADO CITY 310
21 4824 PALESTINE LAKE 302
22 4818 LAKE OF THE PINES 298
23 4807 CADOO LAKE 297
24 4814 FT PHANTOM HILL LAKE 296
25 4806 LAKE BUCHANAN ' 261
26 4830 STAMFORD LAKE 259
27 4819 LAVON RESERVOIR 258
28 4832 TAWAKONI LAKE 253
-------
LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
39 4821 LYNDON B JOHNSON LAKE 338
30 4834 TEXOMA LAKE 217
31 4829 SOMEKVILLE LAKE 208
32 4826 SAN ANGELO HESERVOIR 200
33 4833 TEXAKKANA LAKE 176
34 4815 GARZA LITTLE ELM RESERVO 173
35 4836 TRINIDAD 169
36 4804 BRAUNIG LAKE 159
37 4811 CORPUS CRIST I LAKE 155
38 4817 HOUSTON LAKE 139
39 4820 LIVINGSTON LAKE 91
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x 10"4 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
«
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR TEXAS
LAKE CODE 48?2 MEDINA RESERVOIR
TOTAL DRAINAGE A*EA OF LAKE 1542.1
OP/11/76
SUB-DRAINAGE
TRIBUTARY AREA'SQ KM) JArg
Ft3
MAR
APR
MAT
NORMALIZED FLOWS(CMS)
JUN JUL AUG
SEP
OCT
NOV
DEC
MEAN
482?A1
4822A2
4822B1
4822ZZ
1642.1
1227.7
145.8
269.4
1.59
2.55
0.22
0.43
1.93
3.06
0.20
0.51
1.78
3.28
0.21
0.54
1.76
3.62
0.31
0.68
2.72
4.76
0.62
1.10
3.54
4.25
0.27
0.71
t>.74
4.81
0.48
0.96
3.37
3.b8
0.40
0.76
2.97
2.97
0.40
0.68
3.40
4.22
0.28
0.71
2.52
2.66
0.22
0.48
1.67
2.24
0.12
0.37
2.84
3.51
0.31
0.67
TOTAL DRAINAGE AREA OF LAKE
SUM OF SUB-DRAINAGE AREAS
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH
4822A1
YEAR
MEAN FLOW DAY
4822A2
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
4.53
1.67
6.63
4.59
7.36
13.14
9.06
4.47
17.92
15.40
8.95
2.15
5.75
3.71
6.80
6.97
6.97
23.11
8.21
5.80
24.01
12.20
7.67
3.57
7
6
7
7
7
7
7
7
9
8
14
2
7
6
7
7
7
7
7
8
9
8
14
2
1642.1
1642.8
FLOW DAY
5.66
2.18
6.14
4.62
9.43
58.90
12.57
4.98
7.25
13.31
12.12
3.11
3.14
3.43
6.74
27.33
7.73
27.33
9.80
b.24
8.89
11.75
7.36
4.64
22
21
22
21
SUMMARY
TOTAL FLOW IN = 53.82
TOTAL FLO* OUT = 33.98
FLOW DAY
FLOW
2.92
22.94
4.64
23.93
-------
TRIBUTARY FLO* INFORMATION FOR TEXAS
LAKE CODE 4822 MEDINA RESERVOIR
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YE.AR MEAN FLOW DAY FLO* DAY KLOW DAY
02/11/76
4822H1
4822ZZ
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
0.62
0.05
0.59
0.34
0.40
4.25
0.48
0.10
0.57
0.45
0.45
0.0
1.19
0.59
1.30
1.08
1.13
6.46
1.36
0.74
3.14
1.76
0.91
0.40
7
6
7
7
7
7
7
8
9
8
14
2
FLOW
0.74
0.01
0.71
0.28
0.51
5.49
0.71
0.40
0.0
0.48
0.00
0.0
22
21
0.0
0.45
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
ET RETRIEVAL DATE 75/02/1 i
482201
29 32 27.0 098 56 01.0
MEu-INA LAKE
48325 IC.AAS
DATE
FROM
TO
74/03/12
74/05/22
74/08/15
74/11/05
00010
TIME DEPTH WATER
or TEMP
DAf FEET
10
10
10
10
10
10
10
10
10
10
10
10
10
13
13
13
13
13
13
13
13
13
13
13
13
13
13
13
05
05
05
05
05
05
05
00
00
00
00
00
00
40
40
40
40
40
40
40
30
30
30
30
30
30
30
30
0000
0006
0022
0042
0062
0090
0117
0000
0005
0020
0030
0065
0119
0000
0010
0025
0039
0055
0085
0112
0000
0005
0020
0040
0065
0075
0090
0108
CENT
16
16
15
14
12
11
10
26
26
25
23
14
12
27
27
27
24
17
13
12
20
20
20
20
20
IS
13
13
.7
.6
.9
.2
.2
.5
.8
.4
.5
.2
.5
.1
.3
.1
.1
.0
.3
.5
.3
.4
.7
.7
.7
.7
.6
.6
.6
.3
00300
00
MG/L
9
9
9
8
7
4
8
8
8
4
1
7
7
7
1
1
1
0
7
7
7
7
6
0
0
0
.6
.4
.2
.6
.0
.4
.0
.0
.0
.0
.2
.6
.0
.6
.6
.4
.0
.2
.6
.6
.4
.4
.6
.2
.4
.0
00300
00
MG/L
9.6
9.4
9.2
8.6
7.0
4.4
8.0
8.0
8.0
4.0
1.2
7.6
7.0
7.6
1.6
1.4
1.0
0.2
7.6
7.6
7.4
7.4
6.6
0.2
0.4
0.0
00077 00094
TRANSP CNOUCTVY
SECCHI FIEuD
INCHES MICROMHO
132 375
375
370
360
345
345
360
95 442
438
426
416
368
365
144 416
415
415
426
397
369
367
120 370
368
367
366
366
381
371
370
11EK,
3
00400
PH
SU
6.00
8.00
8.00
8.00
8.00
7.75
7.60
8.30
8.25
8.00
7.90
7.50
7.45
8.40
8.40
8.40
7.70
7.80
7.80
7.80
8.06
8.04
8.02
7.99
7.95
7.39
7.43
7.39
iLES
00410
T ALK
CAC03
MG/L
166
188
188
192
192
194
197
149
149
155
155
187
184
151
148
148
147
149
186
195
201
2111202
0121
00610
NH3-N
TOTAL
MG/L
0.040
0.040
0.040
0.050
0.060
0.020K
0.020
0.030
0.020
0.030
0.030
0.020
0.040
0.030
0.030
0.030
0.030
0.030
0.040
0.220
0.450
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.300
0.300
0.200
0.200
0.200
0.200
0.200
0.400
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
0.300
0.400
0.700
00630
N02&N03
N-TOTAL
MG/L
0.640
0.660
0.660
0.660
0.660
0.720
0.700
0.540
0.540
0.500
0.570
0.650
0.630
0.270
0.260
0.260
0.2t>0
0.260
0.400
0.120
0.020K
00671
PnOS-OIS
ORTHO
MG/L P
0.005
0.004
0.004
0.004
0.004
0.004
0.004
0.002
0.003
0.003
0.003
0.002
0.004
0.005
0.004
0.004
0.005
0.011
0.012
0.011
0.015
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET KETRIEVAL DATE 76/02/11
482301
29 32 27.0 098 56 01.0
MEDINA LAKL
TE...AS
00665
DATE TIME DEPTH PHOS-TOT
FPOM OF
TO DAr FEET MG/L f
74/03/12
74/05/22
74/08/15
74/11/05
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
13
13
13
13
13
13
13
13
13
13
13
13
13
05
05
05
05
05
05
05
00
00
00
00
00
00
00
00
40
40
40
30
30
30
30
30
30
30
30
30
30
0000
OOOb
0022
0042
0062
0090
0117
0000
0001
0005
0015
0020
0030
0065
0119
0000
0006
0039
0000
0001
0005
0020
0022
0040
0065
0075
0090
0108
0.007
0.008
0.007
0.006
0.006
0.006
0.009
0.009
o.ooe
0.008
0.006
0.008
0.009
0.017
0.010
0.010
•J.010
0.010
0.012
0.010
0.027
32217
CHLRPHYL
A
UG/L
2.8
00031
INCDT LT
PERCENT
3.3
50.0
1.0
6.6
2.5
50.0
1.0
50.0
1.0
UEPALtS
3
21112u2
0121 FEET
DEPTH
-------
bTOSET RETRIEVAL DATE 7(3/02'
482202
29 33 58.0 098 55 25.0
MEDINA LAKE
48019 rtAAS
DATE
FROM
TO
74/03/12
74/05/23
74/08/15
74/11/05
00010
TIME DEPTH WATER
OF TEMP
OAY FEET
11
11
11
11
11
11
11
11
11
11
11
11
14
14
14
14
14
14
14
14
14
14
14
14
14
14
00
00
00
00
00
00
00
00
00
00
00
00
10
10
10
10
10
10
20
20
20
20
?0
20
?0
20
0000
0006
0020
0045
0065
0096
0000
0005
0020
0050
0075
0099
0000
0010
0033
0050
0070
0092
0000
0005
0020
0035
0040
0060
0075
0096
CENT
18
16
15
13
12
11
26
26
25
17
13
12
28
28
26
17
14
13
20
20
20
20
20
20
15
13
.3
.9
.7
.8
.2
.2
.7
.6
.1
.7
.5
.6
.1
.0
.5
.8
.6
.1
.9
.9
.9
.9
.9
.7
.3
.7
00300
00
MG/L
9
9
9
7
4
6
7
1
3
0
7
7
5
0
0
0
7
7
7
7
6
0
0
*
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
*
•
•
*
•
•
2
2
0
2
2
0
8
8
0
7
8
6
8
<+
0
6
4
2
0
2
4
2
0
IIE^ALES
00300
00
MG/L
9.2
9.2
9,0
7.2
4.2
6.0
7.8
1.8
3.0
0.7
7.8
7.6
5.8
0.4
0.0
0.6
7.4
7.2
7.0
7.2
6.4
0.2
0.0
00077 00094
T«aNSP CNDUCTVY
SECCHI FIELD
INCHES MICWOMHO
108 390
385
375
360
350
350
96 438
433
423
393
368
373
96 423
421
417
403
381
372
132 372
371
371
370
369
369
381
375
3
00400 '
KH
su
8.00
8.00
8.00
7.90
7.85
7.60
8.00
8.00
7.60
7.50
7.4Q
7.40
8.40
8.40
8.10
7.50
7.70
7.75
8.09
8.07
8.05
8.05
8.03
7.92
7.37
7.35
00410
T ALK
CAC03
MG/L
175
179
183
187
188
190
149
149
152
186
189
192
153
153
153
154
153
184
199
211
0100
00610
NH3-N
TOTAL
MG/L
0.030
0.040
0.040
0.060
0.050
0.030
0.040
0.040
0.030
0.020
0.030
0.040
0.040
0.030
0.020
0.040
0.050
0.190
0.690
1202
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.300
0.300
0.300
0.200
0.200K
0.20 OK
0.200
0.200K
0.200K
0.200K
0.200K
0.200K
0.400
0.200
0.200
0.200
0.300
0.400
0.900
00630
N02&N03
N-TOTAL
MG/L
0.610
0.630
0.650
0.640
0.650
0.690
0.580
0.55C
0.550
0.690
0.680
O.MO
0.250
0.260
0.260
0.260
0.260
0.120
0.020K
00671
PriOS-UlS
ORTHO
MG/L P
O.OOJ
0.004
0.004
0.004
0.005
0.008
0.004
0.004
0.007
0.003
0.002
0.002
0.012
0.006
0.013
0.005
0.006
0.010
0.005
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 7b/G2/ll
482202
29 33 58.0 098 55 25.0
MEOINA LAKE
H'MS
11EPALES
3
2111202
0100 FEET
DEPTH
OATE
FROM
TO
74/03/12
74/05/23
74/08/15
74/11/05
00665 32217 00031
TIME DEPTH PHOS-TOT CHL«PHYL 1NCOT LT
OF A REMNING
DAY FEET
1
1
1
1
1
1
1
1
1
1
14
14
14
14
14
14
14
14
14
14
00
00
00
00
00
00
00
00
no
00
00
00
10
10
20
20
20
20
20
20
20
20
0000
0006
0020
0045
0065
0096
0000
0005
0020
0050
0075
0099
0000
0033
0000
0005
0020
0022
0040
0060
0075
0096
MG/L P JG/L PERCENT
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.006 2.2
.006
.006
.006
.007
.011
.OU7 62.6
.006
.007
.008
.007
.012
7.3
1.0
.011 1.6
.009
.023
1.0
.008
.008
.010
.013
-------
STORE! RETRIEVAL DATE 76/02/11
482203
29 32 25.0 098 56 00.0
MEDINA LAKF
DATE
FROM
TO
74/03/12
74/05/23
74/08/15
74/11/05
00010
TIME DEPTH WATER
OF TEMP
DAY FEET
14
14
14
14
14
11
11
11
11
11
11
14
14
14
14
14
15
15
15
15
15
15
15
20
20
20
20
20
?5
25
25
25
?5
25
40
40
40
40
40
05
05
05
05
05
05
05
0000
0006
0020
0040
008b
0000
0005
0015
0045
0070
0088
0000
0010
0032
0045
0070
0000
0005
0020
0040
0060
0070
0083
CENT
18.
17.
17.
13.
1 1.
27.
26.
25.
19.
13.
12.
27.
27.
26.
19.
14.
21.
21.
21.
21.
20.
16.
16.
2
5
0
4
y
3
5
9
0
5
d
8
5
5
4
8
1
1
1
0
5
5
9
00300
DO
MG/L
9
9
9
6
8
7
1
1
0
7
7
5
0
0
8
7
7
7
4
0
0
.
.
.
.
.
.
.
.
.
.
•
.
.
.
.
.
.
.
.
.
.
2
0
0
4
0
0
0
0
1
2
0
0
2
6
0
6
6
8
8
2
4
IIE'-'ALES
00300
DO
MG/L
9.2
9.0
9.0
6.4
8.0
7.0
1.0
1.0
0.1
7.2
7.0
5.0
0.2
0.6
a.o
7.6
7.6
7.8
4.8
0.2
0.4
00077 00094
THANSP CNOUCTVY
SECCHI FIELD
INCHES MICROMHO
96 405
395
390
360
350
65 449
440
429
400
372
372
120 424
430
428
410
387
96 376
376
375
374
391
393
395
3
00400
PH
su
8.05
8.00
8.00
8.00
7.80
8.00
7.90
7.50
7.30
7.30
7.30
8.40
8.30
8.00
7.70
7.70
8.09
8.09
8.08
8.07
7.68
7.J4
7.36
00410
T ALK
CAC03
MG/L
182
183
182
186
190
1S3
155
152
182
184
187
148
148
146
148
149
189
199
211
0090
00610
NH3-N
TOTAL
MG/L
0.050
0.040
0.040
0.050
0.060
0.030
0.040
0.060
0.050
0.070
0.060
0.040
0.040
0.050
0.030
0.060
0.320
0.560
1202
FEET DEPTH
00625
TOT KJEL
N
MG/L
0.300
0.200
0.200
0.200
0.200
0.200
0.200
0.200
0.200K
0.200K
0.300
0.400
0.200K
0.200K
0.200K
0.200K
0.500
0.700
00630
M02kN03
N-TOTAL
MG/L
0.670
0.660
0.660
0.650
0.670
0.580
0.600
0.560
0.630
0.580
0.520
0.250
0.260
0.250
0.260
0.240
0.020
0.020K
. 00671
PHOS-DIS
OHTHO
MG/L P
0.005
0.004
0.004
0.004
0.004
0.002K
0.004
0.002
0.003
0.003
0.004
0.011
0.010
0.007
0.004
0.002
0.005
0.002
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STOREY RETRIEVAL DATE 76/02/11
482203
29 32 25.0 098 56 00.0
MEDINA LAKE
TLAAS
11EPALE5
3
2111202
0090 FEET
DEPTH
DATE
FROM
TO
74/03/12
7<»/05/23
7>/08/15
74/11/05
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCOT LT
OF A PENNING
DAY FEET
14
14
14
14
14
11
11
11
11
11
11
14
14
15
15
15
15
15
15
15
20
20
?0
20
20
25
?5
25
25
25
25
40
40
05
05
05
05
05
05
05
0000
0006
0020
0040
0086
0000
0005
001S
0045
0070
0088
0000
0032
0000
0005
0020
0040
0060
0070
0083
MG/L P UG/L PERCENT
0
0
0
0
0
0
0
0
0
0
0
0
0
0
u
a
0
0
.003 2.9
.008
.021
.006
.009
.007 62.6
.009
.071
.013
.017
.162
2.4
1.0
.011 1.7
.009
.023
.011
.043
.016
.019
-------
STOSET RETRIEVAL DAT£ 76/02/11
4*2204
29 36 37.0 098 58 26.0
MEDINA LAKE
<*8019 T'-\AS
DATE
FROM
TO
74/03/12
74/05/23
74/08/15
74/11/05
TIME DEPTH
OP
DAY FEET
13 15 0000
13 IS 0006
13 15 0015
13 15 0020
13 15 0035
13 15 0048
11 45 0000
11 45 0005
11 45 0015
11 45 0025
11 45 0035
11 45 0046
15 05 0000
15 05 0005
15 05 0017
15 05 0030
15 05 0042
15 40 0000
15 40 0005
15 40 0015
15 40 0030
15 40 0046
00010
WATER
TEMP
CENT
19.5
18.8
17.1
16.6
12.9
12.5
27.4
27.3
27.0
25.6
22.6
20.3
28.9
29.0
28.1
27.5
22.3
20.8
20.8
20.8
20.7
20.7
11EPALES
00300
DO
MG/L
-------
STOREf RETRIEVAL DATE 7t,/02/ll
4B2204
29 36 37.0 098 58 26.0
MEDINA LA*F.
48019 ThAAS
11EPALES
3
2111202
0052 FEET
DEPTH
DATE
FROM
TO
74/03/12
74/05/23
74/08/15
74/11/05
TIME DEPTH
or
OAY FEET
13 15 0000
13 15 0006
13 15 0015
13 15 0020
13 15 0035
13 15 0048
11 45 aooo
11 45 0005
11 45 0015
11 45 0025
11 45 0035
11 45 0046
15 05 0000
15 05 0017
15 40 0000
15 40 0005
15 40 0015
15 40 0030
15 40 0046
00665 32217 00031
PHOS-TOT CHL9PHYL INCDT LT
A REMNING
MG/L P UG/L PERCENT
0.009 1.7
0.014
0.009
0.007
0.009
0.011
0.014 40.9
0.011
0.010
0.010
0.022
0.044
3.3
1.0
0.017 2.7
0.015
0.014
0.016
0.017
-------
APPENDIX E
TRIBUTARY DATA
-------
STOHET KETRIEV&L DATE 7&/03/10
DATE TIME DEPTH N02SN03
FROM OF
TO DAY FEET
74/09/07
74/10/06
74/11/07
74/13/07
75/01/07
75/02/07
75/03/07
75/04/07
75/04/22
75/05/09
75/05/21
75/06/08
75/07/14
75/08/02
10 00
09 05
09 37
10 55
11 14
09 40
10 11
11 10
09 45
09 ?5
09 20
10 05
10 15
11 00
4S22A1
29 31 54.0 098 56 06.0 4
MEDINA RIVER
48053 7.5 MEDINA LAKE
0/MEDINA LAKE
SEC HO BRJG .5 MI S OF MEDINA DAM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
10630
JSN03
rOTAL
*G/L
0.252
0.280
0.248
0.232
0.272
0.304
0.380
0.620
0.575
0.575
0.570
0.530
0.410
0.360
00625
TOT KJEL
N
MG/L
0.800
0.100
0.400
0.500
0.300
0.200
0.150
0.650
0.200
0.200
0.500
0.350
0.250
0.350
00610
NH3-N
TOTAL
MG/L
0.030
0.020
0.020
0.048
0.046
0.032
0.050
0.015
0.020
0.025
0.025
0.017
0.020
0.015
00671
PhOS-OIS
ORTHO
MG/L P
0.005K
0.005K
0.005
0.008K
0.005K
0.008K
0.005K
0.005K
0.005K
0.005
0.010
0.005K
0.005
0.005K
00665
PHOS-TOT
MG/L P
0.005
0.010K
0.010K
0.010K
0.010K
0.010*
0.010K
0.010
0.010K
0.010K
0.010K
0.020
0.010K
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE:T RETRIEVAL DATE ?6/03/io
4822A2
29 40 52.0 099 56 35.0 4
MEDINA RIVCR
48 7.5 PIPE CREEK
T/MEDINA LAKE
ENG XING BftOG 1 MI N* OF JCT W RD 1283
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/09/07
74/10/06
74/11/07
74/12/07
75/01/07
75/02/07
75/03/07
75/04/08
75/04/22
75/05/09
75/05/21
75/06/08
75/07/14
75/08/02
TIME DEPTH
OF
DAY FEET
12 50
10 00
10 30
11 45
11 SO
10 35
11 03
11 28
10 41
10 10
10 10
11 00
11 00
11 50
00630
N02&N03
N-TOTAL
MG/L
1.040
0.940
0.704
0.950
1.060
0.300
1.720
1.250
1.250
0.900
0.560
1.100
0.980
0.860
00625
TOT KJEL
N
MG/L
0.200
0.400
0.200
0.400
0.100K
0.100
0.100
0.350
0.600
0.650
0.600
0.475
0.150
0.450
00610
NH3-N
TOTAL
MG/L
0.015
0.020
0.010
O.OOflK
0.016
0.008K
0.015
0.040
0.025
0.035
0.030
0.015
0.010
0.015
00671
pHos-ms
ORTHO
MG/L P
0.005
0.005K
0.005
0.008K
0.005K
O.OOCK
0.005K
0.005K
0.005K
0.005
0.005
0.005K
0.005K
0.005K
OC665
PHOSrTOT
MG/L P
0.010
0.010K
0.010K
0.010*
0.010
0.010K
0.010K
C.010
0.010
0.060
0.050
0.010
0.020
0.020
K VALUE KNOWN TO ee
LESS THAN INDICATED
-------
STORET RETRIEVAL OAft 76/03/10
DATE TIME DEPTH N02S.N03
FROM OF
TO DAY FEET
74/09/07
74/10/06
74/11/07
74/12/07
75/01/07
75/03/07
75/03/07
75/04/08
75/04/22
75/05/09
75/05/21
75/06/08
75/07/14
75/08/02
13 55
11 10
11 45
14 25
12 45
12 25
12 14
13 16
11 40
11 10
11 10
12 40
12 35
13 20
4822A3
29 51 15.0 099 17 05.0 4
MEDINA RlVCr*
46 BANOEhiA CO MAP
T/MEDINA LAKE
HWY tJRDG 16 4 MI NNW OF MEDINA
11EPALES 2111204
0000 FEET DEPTn CLASS 00
0630
IS.N03
OTAL
IG/L
0.460
0.384
0.448
0.600
0.680
1.B20
0.950
0.575
0.500
0.450
0.410
0.990
0.430
0.630
00625
TOT KJEL
N
MG/L
0.150
0.100
0.600
0.400
0.100K
0.200
0.350
0.400
0.150
0.300
0.150
0.200
0.100
0.200
00610
NH3-N
TOTAL
MG/L
0.025
0.015
0.015
0.024
0.008
0.008K
0.010
0.025
0.020
0.025
0.020
0.020
0.015
0.005
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.005K
0.015
0.016
0.005K
0.008K
0.005K
0.005K
0.005K
0.005K
0.005K
0.005K
0.005K
0.020
00665
PMOS-TOT
MG/L P
0.005K
0.010K
0.015
0.016
0.010K
0.010K
0.010K
0.020
0.010K
0.010K
0.010K
0.010K
0.010K
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 70/03/10
4822A4
29 51 30.0 093 19 45.0 4
N PRONG MECINA RIVER
48 BANDERA CO MAP
T/MEDINA LAKE
FM2107 RU 8WDG 5.5 MI NW OF MEDINA
lltPALES 21112CK.
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/09/07
74/10/06
74/11/07
74/12/07
75/01/07
75/02/07
75/03/07
75/04/08
75/04/22
75/05/09
75/05/21
75/06/08
75/07/14
75/08/02
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
14
11
12
14
13
14
12
14
11
11
11
13
12
13
10
30
00
45
00
50
36
01
50
20
20
20
50
55
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.1*2
i 144
.368
.672
.790
.945
.780
.540
.330
.345
.390
.490
.315
.210
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
400
100
400
400
100
100K
050
100
650
250
450
250
300
700
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
c.
0.
0.
0.
0.
0.
0.
0.
0.
097
015
010
016
006
008K
010
040
030
030
030
015
015
025
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
005K
005K
005
008K
005K
008K
005K
005K
005K
005K
005K
005K
005K
005K
MG/L P
0.005K
0.0 ION
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.020
0.010K
K VALUE KNOWN TO 8E
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/03/lU
4822B1
29 40 25.0 098 57 *0.0 4
RED MLUFF C
-------
STORET RETRIEVAL .DATE Vb/03/lG
4822C1
29 36 12.0 098 55 50.0 4
ELM CREEK
48 7.S MEDINA LAKE
T/MEDINA LAKE
2NORY RO BRDG 0.2 MI SW JCT RO 1283
11EPALES 2111204
0000 FEET DEPTH CLASS 00
37
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/09/07
74/10/06
74/11/07
74/12/07
75/01/07
75/02/07
75/03/07
75/04/OB
75/04/22
75/05/09
75/05/21
75/06/08
75/07/14
75/08/02
10 45
09 35
10 05
11 25
11 30
10 02
10 40
10 15
10 04
09 45
09 35
10 25
10 35
11 19
0630
&N03
OTAL
G/L
4.700
2.880
2.240
1.100L
2.700
1.500
5.000
4.400
4.200
3.800
3.450
3.100
2.800
2.800
00625
TOT KJEL
N
MG/L
0.200
0.100
0.500
0.300
0.100
0.100K
0.250
0.200
0.300
0.450
0.150
0.400
0.100
0.400
00610
NH3-N
TOTAL
MG/L
0.030
0.040
0.015
0.016
0.016
0.016
0.035
0.025
0.015
0.025
0.005
0.020
0.015
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.005K
0.005K
0.005
0.008K
0.008K
0.008K
O.OOSK
0.005K
O.OOSK
O.OOSK
O.OOSK
O.OOSK
O.OOSK
O.OOSK
00665
PHOS-TOT
MG/L P
O.OOSK
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.010K
0.0 10K
0.010K
0.010K
0.010K
0.010K
0.010
K VALUE KNOWN TO BE
LESS THAN INDICATED
L ACTUAL VALUE 15 KNOrfN TO bt
GREATER THAN VALUE GIVtN
-------
STORE! RETRIEVAL DATE 76/03/10
482201
29 47 30.0 099 16 45.0 4
W PRONG MEDINA RIVER
48 6ANDERA CO MAP
T/MEDINA LAKE
2NDRY RD 8RDG 0.2 MI S JCT 2NDRY RD 1336
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/09/07
74/10/06
74/11/07
74/12/07
75/01/07
75/02/07
75/03/07
75/04/08
75/04/22
75/05/09
75/05/21
75/06/08
75/07/14
75/08/02
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
13
10
11
14
12
13
13
12
11
10
10
13
12
11
30
55
29
10
30
06
07
32
25
55
55
00
15
35
MG/L
0.390
0.416
0.416
0.680
0.660
0.760
0.735
0.450
0.400
0.360
0.410
0.590
0.250
0.300
MG/L
0.100
0.100K
0.900
0.300
0.200
0.100
0.1SO
0.5SO
0.400
0.375
0.400
0.200
0.150
0.400
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.020
0.020
0.030
0.016
0.016
0.008K.
0.025
0.055
0.027
0.020
0.030
0.010
0.015
0.015
MG/L P
O.OOSK
O.OOSK
0.010
0.008K
0.005
O.OOSK
O.OOSK
O.OOSK
O.OOSK
O.OOSK
O.OOSK
O.OOSK
O.OOSK
O.OOSK
MG/L P
O.OOSK
0.0 10K
0.010
0.010K
0.010K
0.010K
0.010
0.030
0.020
0.010K
0.015
0.010K
0.020
0.010K
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |