U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LAKE HOUSTON
HARRIS COUM7
TEXAS
EPA REGION VI
WORKING PAPER No, 647
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
699-440
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REPORT
ON
LAKE HOUSTON
HARRIS COUMIY
TD(AS
EPA REGION VI
WORKING PAPER No, 647
WITH THE COOPERATION OF THE
TEXAS WATER QUALITY BOARD
AND THE
TEXAS NATIONAL GUARD
MARCH B77
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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 4
III. Lake Water Quality Summary 5
IV. Nutrient Loadings 11
V. Literature Reviewed 18
VI. Appendices 19
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11
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)J, 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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m
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 Christ!
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
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Lyndon B. Johnson
Medina
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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Map Location
LAKE HOUSTON
(g) Tributary Sampling Site
x Lake Sampling Site
• Sewage Treatment Facility
10 30 30 Km.
5 10 is Mi.
Scale
94' 30
1
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LAKE HOUSTON
STORE! NO. 4817
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate Lake Houston is eutrophic; i.e., well-
supplied with nutrients and quite productive. Whether nutrient
enrichment is beneficial or deleterious depends on the actual
or potential effect on the uses of the lake. In this regard,
the Texas Water Quality Board has indicated that there is little
or no impairment of the designated beneficial uses of this water
body.
Lake Houston ranked 38th in overall trophic quality when the
39 Texas reservoirs sampled in 1974 were compared using a combina-
tion of six water quality parameters*. Thirty-two of the water
bodies had less median total phosphorus and median inorganic
nitrogen, 34 had less median orthophosphorus, 29 had less mean
chlorophyll a_, and all of the other water bodies had greater mean
Secchi disc transparency.
Survey limnologists observed floating and emergent macrophytes
near sampling stations 2, 3, and 4 in May, August, and November.
B. Rate-Limiting Nutrient:
The algal assay results indicate the lake was nitrogen limited
at the time the sample was taken (11/06/74). The lake data indi-
cate three of the four sampling stations were nitrogen limited in
* See Appendix A.
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March, three were phosphorus limited in May, and all four were
nitrogen limited in November. However, the lack of transparency
(mean Secchi disc depth <0.4 m) indicates primary productivity
may be light-limited much of the time.
C. Nutrient Controllability:
1. Point sources—During the sampling year, municipal point
sources contributed an estimated 47.3% of the total phosphorus
load to Lake Houston. The City of Cleveland contributed 1.8%;
the Forest Cove MUD, 1.2%; the City of Humble, 0.6%; and 36 waste-
water treatment facilities which discharge in the Cypress Creek
drainage contributed an estimated 43.5% of the total load.
The phosphorus loading of 6.13 g/m2 measured during the sam-
pling year is over six times that proposed by Vollenweider (Vollen-
weider and Dillon, 1974) as a eutrophic loading (see page 17).
Complete removal of phosphorus at the point sources considered
in this report would reduce the overall loading to 3.20 g/m2/yr
which is still 3.3 times the eutrophic loading. Since it is likely
that the primary productivity of Lake Houston is light-limited much
of the time, point-source phosphorus control would not be expected
to result in any appreciable change in the overall trophic condition
of the lake.
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2. Non-point sources--Non-point sources, including precipi-
tation accounted for 52.2% of the total phosphorus inputs to Lake
Houston during the sampling year. After point sources were sub-
tracted, Cypress Creek contributed an estimated 2.3%; the West Fork
San Jacinto River, 27.8%; Spring Creek, 10.5%; and the remaining
five sampled tributaries collectively contributed 10.0%. The
ungaged minor tributaries and immediate drainage contributed an
estimated 1.3% of the total load.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
A. Lake Morphemetry :
1. Surface area: 49.53 kilometers2.
2. Mean depth: 3.7 meters.
3. Maximum depth: >6.1 meters.
4. Volume: 180.953 x 106 m3.
5. Mean hydraulic retention time: 55 days (based on outflow).
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
W. Fk. San Jacinto R.** 2,095.0 18.07
Cypress Creek 782.2 4.26
Spring Creek 1,059.3 5.57
Caney Creek 393.7 2.73
Peach Creek 404.0 2.60
E. Fk., San Jacinto R. 971.2 6.82
Luce Bayou 461.0 3.06
Unnamed Stream L-l 53.9 0.36
Minor tributaries &
immediate drainage - 1,054.7 1.26
Totals 7,275.0 44.73
2. Outlet -
San Jacinto R. 7,324.5 30.02
Canal B-l - 0.76
Canal C-l** - 7.24
Totals 7,324.5*** 38.02***
C. Precipitation****:
1. Year of sampling: 125.2 centimeters.
2. Mean annual: 122.4 centimeters.
t Table of metric conversions—Appendix B.
tt At spillway crest elevation (Latchford, 1974).
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Anonymous, 1976.
*** Includes area of lake; lesser outflow due to evaporation.
**** See Working Paper No. 175.
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III. LAKE WATER QUALITY SUMMARY
Lake Houston 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 one or more depths at four stations on
the lake (see map, page vi). During each visit, a single depth-inte-
grated (near bottom to surface) sample was composited from the stations
for phytoplankton identification and enumeration; and during the
November visit, a single 18.9-liter depth-integrated sample was com-
posited 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 3.0 meters at station 1, 4.9 meters
at station 2, 4.6 meters at station 3, and 2.1 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 preserved properly and were not analyzed).
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PARAMETER
TEMP (C)
OISS OXY (MG/L)
CNOCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/D
TOT P (MG/L)
ORTHO P (MG/L)
N02*N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N IMG/LI
TOTAL N (MG/L)
CHLRPYL A (UG/L)
SECCHI (METERS)
A. SUMMArtf OF PHYSICAL AND
1ST SAMPLING ( 3/16/7*)
* SITES
RANGE
19.7 - 20.5
6.6 - 8.0
193.
7.5
MEAN MEUIAN
20.2 20.*
7.0
1*9. - 350.
7.1 - 7.8
37. - 68.
0.050 - 0.105
0.012 - 0.0*5
0.050 - 0.200
0.070 - 0.110
0.600 - 1.000
0.120 - 0.290
0.710 - 1.050
8.3 - 10.3
0.5 - 0.5
7.?
201.
7.*
*6. **.
0.06* 0.059
0.02* 0.023
0.1*0 O.lbO
0.090 0.090
0.639 0.600
0.23U 0.250
O.M29 0.790
CHEHICAL CHARACTERISTICS TOR HOUSTON LAKE
STORET CODE *317
2ND SAMPLING < 5/23/7*)
* SITES
RANGE
26.7 - 28.*
3.8 - 6.8
176. - 2*1.
6.5 - 7,8
19. - 37.
0.08* - 0.176 0.118 0.116
0.020 - 0.0*7 0.03* 0.036
0.3*8 0.3*0
0.135 0.130
0.727 0.700
O.*90
1.0*0
MEAN
27.*
5.2
21*.
7.0
29.
MEDIAN
27.3
5.6
21*.
6.8
29.
9.)
0.5
8.7
O.b
0.260 - O.*60
0.100 - 0.220
0.500 - 1.000
0.390 - 0.600 0.*83
0.910 - 1.300 1.075
6.8 - 111.5 *7.2
0.3 - 0.3 0.3
3RD SAMPLING ( 3/19/7*)
* SITES
MEAN MEDIAN
30.2 30.1
*.8 5.0
25*. 2*4.
7.5 7.6
35.3
0.3
RANGE
28.0 - 31.9
2.6 - 5.8
223. - 31*.
7.2 - 7.7
oooooo -oooooooooooooooooooooo
oooooo -oooooooooooooooooooooo
oooooo -oooooooooooooooooooooo
oooooo -oooooooooooooooooooooo
oooooo -oooooooooooooooooooooo
oooooo -oooooooooooooooooooooo
oooooo -oooooooooooooooooooooo
oooooo -eoooooooooooooooooeooo
6.5 - 12.8 8.8 7.9
0.2 - 0.3 0.3 0.3
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A. SUMMARY or PHYSICAL AND CHEMICAL CHARACTERISTICS FO* HOUSTON LAKE
STOrtET COOE
4Tn SAMPLING
b/7 •
>3
i9
0
0
0
0
0
5
4
SITES
MEAN
21.9
5.9
20?6.
6.6
26.
0.111
0.047
0.061
0.074
0.92?
0.136
0.983
1.6
0.4
MEDIAN
22.0
6.0
2258.
6.5
24.
0.097
0.041
0.060
0.080
0.900
0.140
0.990
1.2
0.4
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B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
03/16/74
05/23/74
08/19/74
11/06/74
Dominant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Melosira sp.
Chroomonas sp.
Cyclotella sp.
Chroococcus sp.
Merismopedia sp.
Other genera
Total
Cryptomonas sp.
Ankistrodesmus sp.
Stephanodiscus sj).
Flagellates
Actinastrum sp.
Other genera
Total
Cryptomonas sj).
Chroococcus sp.
Oscillatoria sp.
Stephanodiscus sp.
Pandorina sp.
Other genera
Total
Cryptomonas sp.
Dactylococcopsis sp,
Ankistrodesmus sp.
Oocystis sp.
Oscillatoria sp.
Other genera
Algal Units
per ml
2,173
739
601
462
277
1,574
5,826
2,179
596
547
199
100
100
214
1,756
108
72
36
36
36
180
Total
468
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2. Chlorophyll a_ -
Sampl i ng
Date
03/16/74
05/23/74
08/1 9/74
11/06/74
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)
Chlorophyll a^
8.4
9.0
10.3
8.3
111.5
28.5
42.1
6.8
7.1
6.5
8.7
12.8
1.5
0.9
0.5
3.5
Maximum yield
(mg/1-dry wt.)
0.059
0.109
0.109
0.059
0.142
0.142
1.142
1.142
4.4
4.2
21.1
14.5
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum, indicates that the potential primary productivity
of Lake Houston was high at the time the sample was taken
(11/06/74). Also, the lack of increase in yield with the
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10
addition of orthophosphorus alone indicates the lake was
nitrogen limited at that time (note the marked increase in
yield when only nitrogen was added).
The lake data indicate a spatial and temporal combination
of limiting nutrients. Following is a tabulation of the mean
inorganic nitrogen/orthophosphorus ratios for each of the
sampling stations and times with the indicated limiting
nutrient in parentheses.
Station
1
2
3
4
03/16/74
9/1 (N)
9/1 (N)
19/1 (P)
3/1 (N)
05/23/74
15/1 (P)
15/1 (P)
19/1 (P)
10/1 (N)
11/06/75
4/1 (N)
4/1 (N)
2/1 (N)
2/1 (N)
Note, however, that primary productivity in the lake
may be light-Limited rather than nutrient-limited much of the
time. The mean of the Secchi disc depths for all sampling
times was less than 0.4 meters; and in May, the level at which
1% of the incident light remained was less than 0.7 meters.
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11
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 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.
In this report, nutrient loads for sampled tributaries were cal-
culated using mean annual concentrations and mean annual flows.
Nutrient loads shown are those measured minus point-source loads, if
any.
The outlet nutrient loads were calculated using the means of the
nutrient concentrations at stations A-l, B-l, and C-l and the mean
outlet flow.
The nutrient loads estimated for the wastewater treatment plants
impacting Cypress Creek were greater than the loads measured at
station D-l. The background loads for Cypress Creek and the nutrient
loads for unsampled "minor tributaries and immediate drainage" ("II"
of U.S.G.S.) were estimated using the mean concentrations at stations
E-l, G-l, H-l, K-l, and L-l and the mean annual Cypress Creek and II
flows.
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12
None of the listed point sources participated in the Survey; nutrient
loads from these sources were estimated at 1.134 kg P and 3.401 kg N/
capita/year, and populations were estimated on the basis of 0.3785
m3/capita/day using the plant flows provided by Hyatt (1976).
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13
A.
Waste Sources:
1 . Known municipal* -
Name
Amer. Teachers
Assoc.
Cleveland
**
Pop.
Served
320
5,000
Forest Cove MUD 3,330
Harris Co. UD #5 ?
Houston - Hidden
Echo STP ?
Humble 1,711
New Caney Sch. Distr. -
Jr. High Sch. 150
High Sch. 100
Harris County
WCID #119 7,000
Gulf Coast Waste Disp.
Auth. (GCWDA):
Ponderosa
Central 17,000
Lake Forest 7,500
Bammel Central 10,000
Treschwig
Central 8,650
Kleinwood
Central 10,000
Spring -
North Park 7,000
Treatment
tr. filter
cont. aer.
tr. filter
Mean Flow
(m3/d)
181.7
1,892.5
1,892.5
647.6
87.1
56.8
2,649.5
6,434.5
2,838.8
3,785.0
3,274.0
3,785.0
2,649.5
Receiving
Water
Unnamed trib/
Spring Cr.
embayment
E. Fk., San
Jacinto R.
Siefert Creek
no discharge
no discharge
Flood ditch/W. Fk.,
San Jacinto R.
Trib/Caney Cr.
White Oak Cr./
Caney Cr.
Trib/Cypress Creek
Cypress Creek
Cypress Creek
Cypress Creek
Cypress Creek
Cypress Creek
Cypress Creek
In addition, 29 smaller waste treatment facilities, serving an estimated
population of 50,320, collectively discharge 19,046 m3/day to Cypress Creek*.
* Wyatt, 1976.
** Boothe, 1974.
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14
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source yr total
a. Tributaries (non-point load) -
W. Fk., San Jacinto R. 84,340 27.8
Cypress Creek 7,055 2.3
Spring Creek 31,970 10.5
Caney Creek 6,030 2.0
Peach Creek 3,855 1.3
E. Fk., San Jacinto R. 11,105 3.7
Luce Bayou 8,300 2.7
Unnamed Stream L-l 1,080 0.4
b. Minor tributaries & immediate
drainage (non-point load) - 3,815 1.3
c. Known municipal STP's -
Amer. Teachers Assoc. 365 0.1
Cleveland 5,670 1.9
Forest Cove MUD 3,775 1.3
Humble 1,940 0.6
New Caney Sch. Dist. -
Jr. High 170 0.1
High School 115 <0.1
Harris County WCID #119 7,940 2.6
GCWDA:
Ponderosa Central 19,280 6.3
Lake Forest 8,505 2.8
Bammel Central 11,340 3.7
Treschwig Central 9,810 3.2
Kleinwood Central 11,340 3.7
Spring - North Park 7,940 2.6
29 remaining plants 57,065 18.8
d. Septic tanks - Unknown ?
e. Known industrial - None
f. Direct precipitation* - 865 0.3
Total 303,670 100.0
2. Outputs -
Lake outlet - San Jacinto River 171,455
and canals
3. Net annual P accumulation - 132,215 kg.
See Working Paper No. 175.
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15
Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
W. Fk., San Jacinto R. 667,300 30.3
Cypress Creek 105,075 4.8
Spring Creek 218,340 9.9
Caney Creek 116,230 5.3
Peach Creek 98,230 4.5
E. Fk., San Jacinto R. 247,970 11.2
Luce Bayou 189,625 8.6
Unnamed Stream L-l 15,905 0.7
b. Minor tributaries & immediate
drainage (non-point load) - 56,820 2.6
c. Known municipal STP's -
Amer. Teachers Assoc. 1,090 <0.1
Cleveland 17,005 0.8
Forest Cove MUD 11,325 0.5
Humble 5,820 0.3
New Caney Sch. Dist. -
Jr. High 510 <0.1
High School 340 <0.1
Harris County WCID #119 23,805 1.1
GCWDA:
Ponderosa Central 57,815 2.6
Lake Forest 25,510 1.2
Bammel Central 34,010 1.5
Treschwig Central 29,420 1.3
Kleinwood Central 34,010 1.5
Spring - North Park 23,805 1.1
29 remaining plants 171,140 7.8
d. Septic tanks - Unknown ?
e. Known industrial - None
f. Direct precipitation* - 53,475 2.4
Total 2,204,575 100.0
2. Outputs -
Lake outlet - San Jacinto River 1,779,315
and canals
3. Net annual N accumulation - 425,260 kg.
See Working Paper No. 175.
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16
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
W. Fk., San Jacinto R. 40 319
Spring Creek 30 206
Caney Creek 15 295
Peach Creek 10 243
E. Fk., San Jacinto R. 11 255
Luce Bayou 18 411
Unnamed Stream L-l 20 295
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17
E. 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/mVyr 6.13 2.67 44.5 8.6
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Lake Houston:
"Dangerous" (eutrophic loading) 0.96
"Permissible" (oligotrophic loading) 0.48
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18
V. LITERATURE REVIEWED
Anonymous, 1976. Water resources data for Texas, water year 1975.
Water-Data Rept. TX-75-1, vol. 2, U.S. Geol. Surv., Austin.
Boothe, T. A. (City Mgr.), 1974. Treatment plant questionnaire.
City of Cleveland.
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.
Wyatt, Linda B., 1976. Personal communication (point sources in the
Lake Houston drainage). TX Water Qual. Bd., Austin.
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VI. APPENDICES
APPENDIX A
LAKE RANKINGS
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LA
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LAKE DATA TO 3E USED IN BANKINGS
LAKE
CODE LAKE NAME
4829 SOMEdVlLLE LA*E
4830 STAMFORD LAKE
<«d31 STILLhOUSE HOLLOW RESEKV
4832 TAWAKOM 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
0.053
0.073
O.Olb
0.046
0.106
0.042
0.018
0.389
0.029
0.020
0.028
MEDIAN
iNOrtO N
0.115
O.U60
O.lbO
0.100
0.120
0.160
0.250
0.110
0.250
0.110
0.120
500-
MEAN SEC
473.833
482.714
406.250
466.417
47U.500
451.321
389.913
479.500
454.917
434.500
430.500
MEAN
CHLOkA
24.«.91
18.45?
3.917
18.246
19.119
12.493
5.595
24.300
8.708
4.333
6.912
Ib-
MIN 00
1.7.000
lO.hOO
15.000
13.200
12.400
15.000
15.000
10.000
14.800
15.000
15.000
MEDIAN
UISS UrtlrlO f
0.013
O.U12
0.010
0.013
0.030
0.018
0.007
0.240
0.009
0.009
0.008
-------
.'•'f^CINT OF LAKES «'. Tr| ^IGHL-'R V»'_UCS (NUMBER OF LAKES *!Ti HIGHF.w VALUES)
LAKE
CODE LAKE NAME
4801 AMiSTAO LAKE
4802 HASTROD LAKE
4803 BELTON RESERVOIR
4804 BRAUNIG LAKE
48U5 BROrfNWOOD LAKE
4806 LAKE BUCHANAN
4807 CADDO 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
4830 LIVINGSTON LAKE
4821 LYNDON B JOHNSON LAKE
4822 MEDINA LAKE
4823 LAKE MEREDITH
4824 PALESTINE LAKE
4825 POSSUM KINGDOM RESERVOIR
4826 SAN ANOELO RESERVOIR
4827 SAM RAYBURN RESERVOIR
482ft E V SPENCE RESERVOIR
MEDIAN
TOTAL P
95 (
79 (
92 (
5 (
66 (
47 (
26 (
45 (
99 (
39 (
8 (
68 (
71 (
24 (
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
INO^G N
5
7f
2ft
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)
i 10)
( 16)
< 26)
( 7)
( 33)
( 38)
( 3)
( 28)
( 18)
( 31)
( 33)
( 25)
( 5)
( 22>
( 6)
( 28)
( ID
( 1)
( 4)
( 0)
( 33)
( 12)
( 33)
( 17)
( 151
( 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)
( 3)
( 6)
( 21)
( 0)
( 25)
( 1)
( 15)
( 20)
< 34)
< 27)
( 24)
( 3?)
( 3)
( 26)
( 17)
ME.AN
CHLOtVA
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
( 3d)
( 18)
( 26)
( 3)
( 33)
( 24)
( 12)
( 4)
( 37)
( 16)
( 5)
( 11)
( 30)
( 28)
( 13)
( 21)
( 9)
( 15)
( 32)
( 10)
( 25)
( 14)
( 36)
( 20)
( 22)
( 0)
( 29)
( 19)
MIN DO
39
17
17
49
58
17
76
67
49
38
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
DISS 'J*TnO P
*3
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
< an
( 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)
INOt
NO
402
393
3d4
159
394
261
297
362
445
310
155
372
430
296
173
423
139
298
258
91
238
342
441
302
387
200
322
321
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES *ITH HIGHER VALUES)
LAKE
COOfe. LAKE NAME
4829 SOMERVILLE. LAKE.
4830 STAMFORD LAKE
4831 STILLHOUSE HOLLOW RESf
( 14)
( 5)
( 23)
( 35)
( 4)
( 22)
( 29)
( 30)
MEAN
CHLORA
j
18
•-,?.
21
Ih
45
82
5
61
89
71
( D
( 7)
( 35)
( 8)
( 6)
( 17)
( 3D
( 2)
1 23)
( 34)
( 27)
15-
M[N 00
67
82
17
63
72
17
17
92
49
17
17
( 25)
( 31)
( 0'
( 24)
( 27)
( 0)
( 0)
( 35)
< 17)
( 0)
( 0)
DISS O^T-iO H
30 (
39 (
51 (
30 (
1 J (
21 (
84 (
0 (
63 (
63 <
76 (
10)
14)
19.
10)
5)
7)
3D
0)
21)
21)
28)
INUtX
NO
•JO*
259
372
2^)3
176
217
J84
169
311
390
357
-------
LAKES "ANr-.^D TY INOEJ NOS,
RANK LAKE CODE LAKE NAME
INDEX NO
1 4309 CANTON REbE^VOIR 445
2 4633 LAKE MEREDITH ^\
3 4«13 EAGLE MOUNTAIN LAKE 430
4 4816 KEMP LAKE 423
5 4601 AMISTAO LAKt 402
6 4805 3RO*N*OOD LAKE 394
7 4802 bASTRuP LAKE 393
8 4838 WHITE RlVEH RESERVOIR 390
9 48/?5 POSSUM KINGDOM RESERVOIR 38?
10 4835 TRAVIS LAKE 384
11 4803 BELTON RESEKVOIR 384
12 4831 STIULHOUSE 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 4828 E V SPENCE RESERVOIR 321
19 4837 TWIU riUTTES 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 *ESEKVOI« 258
28 4832 TAWAKONI LA*E 253
-------
LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
29 4d21 LYNDON B JOHNSON LAKE 238
30 4834 TEXOMA LAKE 217
31 4829 SOMEWVILLE LAKE 208
32 4826 SAN ANGELO RESERVOIR 200
33 4833 TEXARKANA LAKE 176
34 4815 GARZA LITTLE ELM RESERVO 173
35 4836 TRINIDAD 169
36 4804 BRAUNIG LAKE 159
37 4811 CORPUS CRISTI 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
-4
Cubic meters x 8.107 x 10 = 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
-------
Y FLOW INFORMATION FOR TF.XAS
06/10/7*
LAKE CODE 4817
HOUSTON LAKE
TOTAL DRAINAGE AREA OF LAK£(SQ KM) 7324.5
SUB-DKAINAGt
TRIBUTARY AREA(SO KM) JAN FES MAR
NORMALIZED FLO»/S(CMS)
APR MAY JUN JUL AUG
SEP
OCT
NOv1
OtC
SUMMAKY
TOTAL DKAINAGE AREA OF LAKE
SUM OF SUB-DRAINAGE AREAS
7324.S
7324.0
TOTAL FLOW IN
TOTAL FLO* OUT
MOTE »«* NO DRAINAGE AREA FOR 481781
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY
4817A1
FLOW DAY
FLOW
4617B1
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
110.436
53.802
249.188
110.436
87.782
99.109
42.475
189.723
130.257
59.465
28.317
26.901
1.218
1.444
1.019
1.019
0.680
1.274
1.671
1.812
2.067
1.642
1.671
0.595
8
7
4
9
24
19
22
18
13
13
27
26
8
7
4
9
24
19
22
18
13
13
27
26
0.0
52.386
396.436
178.396
189.440
79.287
164.238
441.743 30
356.792 29
294.495
59.465
36.812
2.010
2.180
1.076
1.019
0.453
0.453
2.152
1.869 30
2.209 29
0.566
1.274
0.510
67.960
147.814
0.963
2.180
548.75
450.46
MEAN
4817A1
4817B1
4817D1
4817E1
4817G1
4817M1
4817J1
4817K1
4617L1
48172Z
7334.5
0.0
782.2
1059.3
393.7
404.0
971.2
461.0
53.9
3198.6
53.52
0.6b
5.52
7.39
3.68
3.54
9.20
4.11
0.48
26.65
66.54
0.68
6.37
8.58
4.53
5.10
11.19
5.15
0.59
25.80
37.10
0.74
2.27
4.90
2.97
2.97
7.36
3.00
0.34
19.09
61.73
0.76
5.52
9.06
4.25
3.40
11.75
4.59
0.54
30.02
55.22
0.82
7.79
8.92
3.40
3.2t>
8.92
4.33
0.51
28.32
46.75
0.88
5.95
6.9V
3.54
2.83
8.21
3.77
0.45
24.69
11.58
0.88
2.27
2.52
1.42
1.42
2.41
1.39
0.17
9.51
4.67
0.85
1.42
1.87
0.65
0.85
1.13
0.99
0.11
5.80
12.32
0.76
2.83
2.46
1.27
1.27
2.27
1.44
0.17
9,37
20.93
0.71
3.40
2.46
1.84
2.2V
3.26
2.04
0.23
13.00
>*4. 74
0.68
4.25
6.77
2.69
2.41
9.63
3.37
0.40
22.06
35.40
0.68
3.82
5.30
2.55
2.12
7.08
2.83
0.34
18.55
37.26
0.76
4.26
5.57
2.73
2.60
6.82
3.06
0.36
19.33
-------
WY FLOW INFORMATION FOR
LAKE CODE 4817
HOUSTON LAKE
MEAN MONTHLY FLO*'S AND DAILY FLOWS (CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
4817E1
4817G1
4817H1
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
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
7<»
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
FLO** DAY
FLO* DAY
FLO*
20.841
2.095
21.549
14.045
4.163
9.061
3.087
25.457
9.968
8.948
3.115
2.067
13.196
2.152
23.928
13.932
7.674
13.535
5.097
34.547
10.619
6.145
4.276
3.171
8.778
9.345
26.759
8.353
8.495
7.787
3.794
14.838
11.327
4.870
2.917
1.614
4.248
2.832
lb.772
12.459
7.787
7.447
4.899
11.525
8.184
4.616
3.483
3.398
7
7
7
7
10
2
5
12
3
19
7
7
7
9
7
10
2
5
12
3
19
8
7
8
11
12
2
10
12
26
2
24
8
7
7
11
12
2
10
12
26
20
28
0.278
0.906
9.798
3.653
0.170
0.850 19
2. 803 13
37.095
7.7S9
1.019
0.368
0.850
7.023
8.523
4.870
1.841
1.756 19
2.973 21
20.501
19.086
0.878
0.736
0.991
77.871
17.471
5.663
14.498
1.812
7.844
9.571
9.911 20
1.642
0.765
0.906
6.315
15.772
8.778
12.459
2.209
19.510
9.939
2.124
2.010
15.914
7.362
10.081
1.784
2.603
-------
F'.OW IMAGINATION FOR TEXAS
Ob/10/76
LAKE CODE 4817 HOUSTON LAKE
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY
U617J1
4817L1
4817ZZ
MONTH YEAH MEAN FLOW DAY
FLOW DAY
FLOW DAY
FLOW
9
10
\ 1
1 1
12
1
I
O
t
4
c
j
•j
10
11
1 2
L C-
1
1
5
C
4
7
r
g
9
10
1 1
12
1
1
4
C
J
c.
o
7
f
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
74
74
74
74
75
75
75
75
75
75
75
75
74
74
74
74
75
75
75
75
75
75
75
75
19.652
16.735
54.65?
18.236
22.880
19.142
9.061
22.653
31.432
9.061
5.663
5.182
2.039
1.416
7.532
5.890
3.710
3.540
2.379
5.493
3.908
2.265
1.699
1.642
0.079
0.008
0.108
0.054
0.054
0.054
0.003
0.051
0.045
0.031
0.011
0.023
62.297
23.220
107.604
45.307
39.644
48.139
19.539
82.119
67.960
28.317
15.857
11.610
8
8
4
9
13
3
11
3
11
22
22
8
8
4
9
13
3
11
3
11
22
22
8
6
4
9
13
3
11
3
11
22
22
1.982
1.642
8.778
5.663
20.218
28.883
4.078
4.587
36.246
3.483
3.964
0.383
0.368
4.729
2.888
3.115
6.173
1.161
1.274
11.355
0.708
1.076
0.0
0.0
0.0
0.0
0.023
0.153
0.003
0.006
0.181
0.006
0.003
25
24
5.380
2.973
25
1.586
25
0.008
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STOKEi RETRIEVAL DATE 76/.- i\
461701
29 55 04.0 095 08 3b.O
HOUSTON LAKE
48201 TEAAS
DATE
FROM
TO
74/03/16
74/05/23
74/08/19
74/11/06
TIME DEPTH
OF
DAY FEET
10 10 0000
10 10 0006
14 ?5 0000
14 ?5 0002
14 ?5 0006
13 45 0000
13 45 0008
10 30 0000
10 30 0005
10 30 0010
0001:
V«ATEP
TEMP
CENT
19."
l
-------
STORET RETRIEVAL OAT£ 76/02/11
29 59 18.0 095 07
HOUSTON LAKE
48201 TEAAS
11EPALES 3111203
3 0020 FEET DE^T-t
DATE
FROM
TO
74/03/16
74/05/23
74/08/19
74/11/06
TIME
OF
DAY
10
10
10
14
14
14
14
14
14
11
11
11
45
45
45
45
45
45
45
05
05
05
05
05
DEPTH
FEET
0000
0006
0016
0000
0005
0010
0015
0000
0015
0000
0005
0010
00010
WATER
TEMP
CENT
20.4
20.3
20.4
27.2
26.9
26.9
26.8
31.9
29.7
22.6
22.7
22.6
00665
DATE
FROM
TO
74/03/16
74/05/23
74/08/19
7<./ll/06
TIME
OF
DAY
10
10
10
14
14
14
14
14
14
11
11
11
45
45
45
45
45
45
45
45
05
05
05
05
DEPTH
FEET
0000
0006
0016
0000
0002
0005
0010
0015
0000
0000
0005
0010
PHOS-TOT
MG/L P
0
0
0
0
(j
0
0
0
0
0
.067
.059
.059
.124
.115
.116
.121
.100
.097
.093
00300 00077 00094
DO TRANSP CNOUCTVY
SECChI FIELD
MG/L INCHES MICROMHO
7
7
5
3
6
5
5
7
5
5
18
.0
.0
12
.6
.8
.0
.8 11
.4
.2 17
.6
.6
199
195
199
214
214
214
214
269
260
2895
2448
2258
00400 00410 00610 00625 00630 00671
PH T ALK NH3-N TOT KJEL N02&N03 PHOS-DIS
CAC03 TOTAL N N-TofAL OUTHO
su MG/L MO/L MG/L MO/L MG/L H
7
7
7
6
6
6
6
7
7
6
6
6
.50
.50
.40
.85
.80
.80
.80
.65
.55
.46
.4<»
.52
43 0.100 0.800 0.120 0.025
47 0.090 0.600 0.110 0.023
47 0.090 0.600 0.110 0.023
36 0.130 0.800 0.420 0.039
36 0.140 0.600 0.460 0.040
27 0.110 0.600 0.380 0.036
29 0.130 0.600 0.420 0.036
21 0.080 0.800 0.060 0.035
24 0.080 0.700 0.060 0.033
24 0.060 0.700 0.060 0.046
32217 00031
CHLRPHYL INCOT LT
A
UG/L
9
28
6
0
REINING
PERCENT
.0
.5
1.0
.5
.9
-------
STORL1 RETRIEVAL OAFF 76/02/11
481703
30 02 22.0 095 07
HOUSTON LAKE.
48201 TEXAS
11EPALES
DATE
FROM
TO
74/03/16
74/05/23
74/08/19
74/11/06
DATE
FROM
TO
74/03/16
74/05/23
74/08/19
74/11/06
TIME DEPTH
OF
DAY FEET
11 15 0000
11 15 0006
11 15 0013
15 10 0000
15 10 0005
15 10 0013
14 25 0000
14 25 0015
11 30 0000
11 30 0005
11 30 0010
TIME DEPTH
OF
OAY FEET
11 15 0000
11 15 0006
11 15 0013
15 10 0000
15 10 0002
15 10 0005
15 10 0013
14 25 0000
14 25 0002
14 25 0003
11 30 0000
11 30 0005
11 30 0010
0001U
(HATER
TEMP
CENT
20.5
20.4
20.5
28.4
27.2
26.7
31.2
30.1
22.0
22.0
22.0
00665
PH05-TOT
MG/L P
0.054
0.051
0.050
0.084
0.087
0.126
0.090
O.ObJ
0.082
00300
DO
MG/L
7.0
6.6
4.6
4.0
4.6
2.6
5.0
5.0
6.0
32217
CHLRPHYL
A
UG/L
10.3
42.1
8.7
0.5
00077
TR4NSP
SECCHI
INCHES
18
12
12
15
00031
INCDT LT
REMNING
PERCENT
1.0
5.0
1.0
00094
CNOUCTVY
FIELD
MICROMHO
168
193
191
178
176
194
227
223
1424
1211
1380
j
00400
PH
SU
7.20
7.15
7.15
7.00
6.70
6.50
7.60
7.20
6.26
6.17
6.23
00410
r ALK
CACOJ
MO/L
37
38
39
20
19
23
18
18
18
2111202
0017
00610
NH3-N
TOTAL
MG/L
0.100
0.090
0.110
0.130
0.140
0.140
0.060
0.050
0.070
FEET DE^
00625
TOT KJEL
N
MG/L
0.700
0.600
0.600
0.900
0.700
0.700
1.100
1.000
1.000
Tn
00630
\02&N03
N-TOTAL
MG/L
0.160
0.160
0.160
0.260
0.270
0.340
0.030
0.020
0.020K
00671
PHOS-OIS
UWTrlO
MG/L P
0.017
0.012
0.012
0.022
0.020
0,027
0.041
0.039
0.041
K V'JLUc * MUit'N TO
LESS THAN
-------
STOfttT RETRIEVAL OftTE 7b/0?/ll
481704
30 02 17.0 095 09 25.0
HOUSTON LAKE
48201 TEX&S
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/03/16 11 40 0000
74/05/23 15 30 0000
15 30 0002
15 30 0007
74/08/19 14 55 0000
74/11/06 11 55 0000
11 55 0005
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/03/16 11 40 0000
74/05/23 15 30 0000
15 30 0002
IS 30 0007
74/08/19 14 55 0000
74/11/06 11 55 0000
00010
WATER
TEMP
CENT
20.2
28.3
28.3
27.3
31.7
20.7
20.2
00665
PHOS-TOT
MG/L P
0.105
0.176
0.141
0.183
00300
DO
MG/L
7.6
5.8
4.0
4.8
6.2
32217
CHLRPHYL
A
UG/L
8.3
6.8
12.8
3.5
11EPALES 21
3 000
00077 00094 00400 00410 00610
TRANSP CNOUCTVY PH T ALK NH3-N
SECCHI FIELD CAC03 TOTAL
INCHES MICROMHO su
18
12
9
14
00031
INCDT LT
REMNING
PERCENT
1.0
350 7.55
237 7.75
237
241 7.00
314 7.65
154 6.85
156 6.82
MG/L MG/L
68 0.070
28 0.100
31 0.220
56 0.100
0006 FEET DEPTH
00625 00to30
TOT KJEL N02&N03
N
MG/L
1.000
1.000
0.900
1.300
M-TOTAL
MG/L
0.050
0.300
0.270
0.120
00671
PHOS-OIS
ORTHO
MG/L P
0.045
0.043
0.047
0.099
-------
APPENDIX E
TRIBUTARY DATA
-------
STORET rttTHIEVAL DATE 76/03/10
4817A1
29 52 35.0 095 05 40.0 4
SAN JACIMTO RIVEK
48023 -7.5 CROSBY
0/riQUSTON
HWY QO
llEPAuES
0000
1.2 MI NE OF SHELDON
2111204
DEPTH CLASS 00
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/09/Ort
74/10/07
74/11/04
74/12/09
75/01/24
75/02/19
75/03/22
75/04/18
75/04/30
75/05/13
75/05/29
75/06/13
75/07/27
75/08/26
09 15
09 15
09 30
09 30
09 00
09 30
09 00
09 15
09 00
09 45
08 55
11 45
09 10
10 40
00630
N02iN03
N-TOTAL
MG/L
0.124
0.176
0.144
0.088
0.136
0.112
0.175
0.145
0.190
0.330
0.220
0.170
0.925
0.110
00625
TOT KJEL
N
MG/L
1.300
1.000
0.800
1.300
1.200
2.200
2.000
1.400
1.050
1.400
0.850
0.750
0.900
0.650
00610
NH3-N
TOTAL
MG/L
0.020
0.135
0.130
0.048
0.052
0.064
0.230
0.070
0.150
0.0*5
0.040
0.045
0.035
0.017
00671
PHOS-OIS
UKTHO
MG/L P
0.430
0.075
0.060
O.OS6
0.040
U.04U
0.060
0.050
0.050
0.075
0.055
0.045
0.020
0.063
00665
PHOS-TOT
MG/L f>
0.525
0.120
0.130
0.110
0.090
0.110
0.120
0.100
0.120
0.130
0.120
0.110
0.100
0.12C
-------
STORET r^ET*IEVAL OATE 76/03/10
DATE TIME DEPTH N02&N03
FRUM OF
TO DAY FEET
74/09/0*
74/10/07
74/11/04
7<*/l2/09
75/01/2'*
75/02/19
75/03/2?
75/04/18
75/04/30
75/05/13
75/05/29
75/06/13
75/08/26
10 15
10 00
09 45
10 10
09 30
09 45
09 15
09 30
09 10
10 00
09 05
11 53
10 55
461731
29 55 25.0 095 04 20.0 4
SAN JAClNTo rtlVER CANAL
48 7.5 CROSBY
2NDRY RO 2100 BROG 1 MI N OF CWOS-3Y
11EPALES 211120<»
0000 K£ET DEPTH CLASS UO
0630
«>N03
OTAL
G/L
C.252
0.224
0.20U
0.10^
0.22*
0.016
0.620
0.015
0.030
0.550
0.080
0.015
0.315
00625
TuT KJEL
N
MG/L
1.900
0.800
1.100
0.900
1.500
l.POO
4.200
1.S50
1.250
1.150
2.4QO
1.450
00610
NH3-N
TOTAL
MG/L
0.040
0.030
0.055
0.208
0.056
0.010
0.125
0.065
0.110
0.015
0.075
0.075
0.080
00671
PhOS-DIS
ORTHO
MG/L P
0.090
0.075
0.070
0.048
0.040
0.040
0.030
0.025
0.040
0.050
U.025
0.1 25
0.025
00665
PHOS-TOT
MG/L P
0.16b
O.llC
0.130
0.110
0.180
0.130
0.290
0.160
0.100
0.110
0.320
0.200
-------
STO^tf RETRIEVAL DATE 76/03/10
DATE TIME DEPTH N02!>N03
FROM OF
TO DAY FEET
74/09/08
74/10/07
74/11/08
74/12/11
75/01/12
75/02/02
75/03/10
75/04/12
75/05/26
75/07/20
12
12
11
13
12
12
11
11
12
11
00
00
00
00
45
00
30
30
30
30
4817C1
29 54 05.0 095 09 12.0 4
*EST CANAL •
48 7.b HABMASTUN
T/hOUSTON LAKE
BrtOG AT S E0N03
OTAL
IG/L
0.250
0.200
0.104
0.1U4
0.126
0.152
0.150
0.190
0.195
0.220
0.185
00625
TOT KJEL
N
MG/L
1.200
0.900
1.200
1.450
1.000
1.000
1.600
0.450
0.900
0.750
0.650
00610
Nrl3-N
TOTAL
MG/L
0.035
0.045
0.250
0.292
0.046
0.048
0.055
0.130
0.065
0.069
0.04'J
00671
PHOS-DI5
ORTHO
HG/L P
0.065
0.014
0.050
0.052
0.04,0
0.048
0.055
0.015
0.050
0.050
0.050
00665
PHOS-TOT
MG/L P
0.170
0.090
0.110
0.105
0.190
0.070
0.140
0.050
0.120
0.110
0.120
-------
STORET KtTRIEVAL DATE 76/03/1C
4817D1
30 02 00.0 095 22 03.0 4
CYHREbS WEEK
<»6 7.S MAEOAN
T/HOUSTON LAKE
T^EUSCMWIG KG riRDG 3 MI NE OF WESTFIELD
HEPALtS 2111204
0000 fEET DtVfH CLASS 00
00630 00625
DATE TIME DEPTH N02&N03 TOT KJEL
FSOM OF N-TOTAL N
TO OAY FEET
74/09/07 16 00
74/10/07 12 17
74/11/07 12 25
75/01/07 13 15
75/03/10 09 30
75/04/02 09 05
75/04/19 18 05
75/05/05 09 10
75/05/13 U8 00
75/06/12 08 40
75/07/03 08 16
75/08/19 09 15
MG/L
1.920
2.000
0.336
0.384
2.630
1.050
0.190
C.590
2.300
0.115
0.300
0.220
MG/L
2.100
1.100
2.400
2.100
?.900
2.350
1.900
3.100
1.700
1.600
1.400
0.250
00610 00671 00665
NH3-N PriOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.230
1.175
0.200
0.170
0.900
0.600
0.135
1.000
0.115
0.195
0.085
0.015
MG/L P
1.880
1.570
0.380
0.415
2.700
0.660
0.200
0.575
1.950
0.165
0.210
0.165
MG/L P
1.880
1.570
0.780
0.630
3.200
1.900
0.400
0.720
2.110
0.310
0.350
0.210
-------
STORtT RETRIEVAL DATE 76/03/10
481/E1
30 36 30.0 095 26 15.0 4
SPRING CrfEE*
48 'HAkrUS CO MAP
T/HOUSTON LAKE
H*Y 45 B*DG 2.4 MI NW OF
11EPALES 21112u
0000 FEET DEPTH CLASS 00
DATE
FHOM
TO
74/09/07
74/10/07
74/11/07
75/01/07
75/03/10
75/04/02
75/04/19
75/05/05
75/05/21
75/06/12
75/07/03
75/08/19
TIME DEPTH
OK
DAY FEET
15 30
11 50
12 00
12 45
09 10
03 40
18 35
08 40
09 05
09 20
07 45
08 20
00630 00
N02J.N03 TOT
N-TOTAL N
MG/U *C
0.540 1
0.576 C
0.160
0.096
0.210
•J . 290
0.170
0.290
0.290
0.095
0.135
0.270
625
KJEL
1
»/L
.000
1.500
.200
.300
.950
.000
.250
.000
.000
.200
.000
J.400
00610
NH3-N
TOTAL
MG/L
0.125
0.095
0.185
0.232
0.220
0.150
c.ns
0.170
0.125
0.070
0.060
0.030
00671
PHOS-DIS
ORTHO
MG/L P
0.200
0.125
0.115
0.064
0.100
0.120
0.08S
0.130
0.110
0.025
0.050
0.165
00665
PHOS-TOT
MG/L P
0.320
0.220
0.270
0.150
0.15C
0.170
0.160
0.170
0.180
0.030
0.110
0.210
-------
bTORET RETRIEVAL OATt 76/03/10
4317R
30 04 55.0 095 17 45
W FOKK SAN JACINTO
48 7.5 MAEDAN
T/riOubTON LflKE
BANK SaMP 2NDKY RO 3
11EPALES
0 4
MI Srt JCT
2111204
U14
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/09/07
74/10/07
75/01/07
75/03/10
75/04/02
75/04/19
75/05/05
75/05/21
75/06/12
75/07/02
75/08/19
OC630 00625
TIMF DEPTH NO?fcN03 TOT KJEL
OF N-TOTAL N
UAY FEET
16
12
13
10
10
17
09
37
08
16
09
45
51
45
25
05
30
55
55
00
00
40
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
264
188
168
280
320
170
290
195
055
410
290
MG/L
0.
0.
0.
1.
0.
1.
1.
2.
0.
0.
0.
700
500
800
050
650
000
250
000
850
750
500
00610 00671 00665
NH3-N PiHOS-DIS PHOS-TOT
TOTAL OKTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
105
020
064
085
100
055
185
400
105
010
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
145
038
050
095
060
045
125
050
025
165
MG/L P
0.250
0.070
0.120
0.170
0.120
0.080
0.190
0.110
0.090
0.180
0.250
-------
STORE! RETRIEVAL LiATE 76/03/10
461 70s 1
30 Oo 55.0 095 11 30.0 4
CANtt CREEK
48 7-.5 SP-LENDOKA
T/HOUSTON LAKt
2NORY RO 8RDG 1.3 MI E
11EPALES
0000 FEET 0£PTn
JCT «f HWY S9
2111204
CLASS 00
DATE TIME DEPTH
FROM OK
TO DAY FEET
74/09/08 15 00
74/10/07 11 15
74/11/08 10 15
74/12/11 12 10
75/01/12 11 00
75/02/02 10 SO
75/03/10 10 10
75/04/12 10 00
75/05/26 10 00
75/07/02 10 00
75/07/20 10 55
75/08/24 11 00
00630
N02t>N03
N-TOTAL
MG/L
0.192
0.152
0.096
0.072
0.088
0.104
0.165
0.055
0.300
0.220
0.190
0.200
0.095
00625
TOT KJEL
N
MG/L
0.700
0.900
1.700
2.200
1.700
2.100
0.700
1.250
0.550
2.500
0.400
0.450
0.550
00610
NH3-N
TOTAL
MG/L
0.230
0.030
0.360
0.552
0.080
0.072
0.030
0.065
0.110
0.525
0.020
0.040
0.045
00671
PriOS-DIS
ORTHO
MG/L P
0.016
0.015
0.032
0.088
0.024
0.024
0.015
0.020
0.025
0.025
0.005
0.015
0.045
00665
PHOS-TOT
MG/L P
0.03S
0.015
O.OdO
0.090
0.110
0.070
0.020
0.080
0.080
0.180
0.030
0.060
0.090
-------
STORET RETRIEVAL DATE 76/OJ/10
481711
30 03 47.0 095 10 15.0 4
48 7.5 SPLENOOKA
T/HOUSTON LAKE
2NOkr HD 1485 BRDG 2.6 MI E JCT M HWY 59
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/09/08
74/1U/07
74/11/07
74/12/11
75/01/12
75/02/02
75/03/10
75/04/12
75/05/26
75/07/20
75/08/28
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
15
11
10
12
10
10
10
09
09
13
09
10
12
20
05
00
00
50
35
30
45
46
00
45
35
30
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
.176
.152
.096
.048
.064
.780
.130
.045
.165
.130
.210
.175
.180
MG/L
0.
0.
1.
1.
1.
1.
1.
0.
0.
2.
0.
0.
0.
500
909
600
600
000
300
300
850
550
600
300
350
350
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
c.
0.
0.
(J.
0.
0.
0.
0.
0.
0.
0.
0.
075
025
240
400
040
072
610
070
135
390
060
045
030
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
030
015
020
032
016
025
020
015
015
025
010
010
025
MG/L P
0.050
0.020
0.100
0.070
0.050
0.050
0.040
0.050
0.040
0.030
0.030
0.040
-------
STOHET RETRIEVAL OUTE 7o/03/10
4817J1
30 07 45.0 095 07 15.0 4
E FK SAN JACINTO RIVEW
48 MONTGOMERY CO
I/HOUSTON LAKE
2ND»Y RO 1485 BWDG 6 MI E JCT W H*Y 59
11EPALES 2111204
0000 FEET DE^Tn CLASS 00
DATE
FROM
TO
74/09/08
74/10/08
74/11/04
74/12/0*
75/01/13
75/02/03
75/03/11
75/04/03
75/04/25
75/06/11
75/07/22
75/08/22
75/08/24
00630 00625
TIME DEPTH M02S.N03 TOT KJEL
OF N-TOTAL N
(JAY FEET
09
11
13
11
15
13
13
14
12
12
12
11
12
30
46
55
20
00
30
30
30
00
00
30
00
45
MG/L
0
0
0
0
0
u
0
0
0
0
0
0
0
.168
.296
.032
.048
.104
.056
.135
.200
.220
.500
.210
.115
.155
MG/L
2.
0.
U
1.
1.
1.
0.
1.
0.
0.
0.
0.
0.
000
500
400
600
300
400
950
300
875
800
600
600
450
OC610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL OUTHG
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
c.
0.
0.
0.
130
040
125
232
104
1<*4
290
195
190
025
035
150
015
MG/L
0.
0.
0.
U.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
060
075
035
032
024
032
035
010
035
005
045
035
015
MG/L P
0.110
0.090
0.080
0.080
0.170
0.080
0.070
0.020
0.080
0.020
0.090
o.oao
0.050
-------
3TORET RETRIEVAL DATE 7b/03/iO
DATE TIME OEPTrt
FROM OF
TO DAY FEET
7U/09/08
7^/10/03
74/11/04
74/12/09
75/01/13
75/02/03
75/03/11
75/04/03
75/04/25
75/06/11
75/07/22
75/08/22
10 20
13 24
15 10
12 20
15 30
14 00
14 00
13 00
12 30
10 15
13 00
11 30
4817K1
30 Ob 35.0 095 03 30.0 4
LOCt rJAYOU
48 /.b 1-tUhFMAN
T/hiOUSTO.'i LAKE
AT PIPELINE XING 6.5 MI N* OF EASTGATL
llc-PALES 2U1204
0000 FEET DEPTH CLASS 00
0630 00625
&N03 TOT KJEL
OT AL
G/L
0 . 1 3fc
C.096
0.024
0.024
0.043
0.040
0.040
0.065
0.070
0.005
0.010
0.035
N
MG/L
1.700
0.700
2.000
1.300
2.000
2.700
2.800
2.800
2.500
1.600
1.100
1.800
00610
NH3-N
TOTAL
MG/L
0.115
0.040
0.270
0.336
0.336
0.330
0.570
0.400
0.115
00671
PHOS-OIS
ORTHO
MG/L P
0.065
0.055
0.025
0.032
0.024
0.032
0.035
0.025
0.040
0.040
0.020
0.020
00665
PHOS-T01
MG/L P
0.110
0.070
0.060
0.070
0.082
0.070
0.090
0.040
0.120
0.160
0.070
0.090
-------
STORE* RETRIEVAL OtTE "./Q3/iO
4817L1
30 01 05.0 095 06 55.0 4
UNNAMED STREAM
48 7.5 HUFFMAN
T/HOU5TOM LAKE
2NORY RD 1960 bROG 2 MI S* HUFFMAN
HEPALES 2111204
0000 FEET DEPTH CLASS 00
DATE TIME DEPTl N02iN03
FROM OF H-T",
TO OAY FEET
75/01/13 16 00
75/02/03 13 00
75/03/11 13 00
75/04/03 13 30
75/04/25 13 00
75/06/11 09 00
75/07/22 12 00
75/08/22 10 40
Os30
iN02
;TAL
J/L
'j.056
0.040
0.030
0.040
0.0*0
0.025
0.005
0.020
00625
TOT KJEL
N
MG/L
1.200
1.500
1.350
0.450
0.900
2.200
1.350
2.000
00610
NH3-N
TOTAL
MG/L
0.192
n.144
0.075
0.055
0.200
0.060
0.380
0 . 345
00671
PhOS-DIS
ORTHO
MG/L P
0.056
0.080
0.025
0.010
0.045
0.010
0.045
0.020
00665
PHOS-TOT
MG/L P
0.110
0.120
0.050
0.030
0.080
0.123
0.130
0.120
-------
STORET RETRIEVAL OATE 76/03/10
4817M1
29 59 30.0 095 07 12.0 4
UNNAMED DITCH
ttU 7.5 CROSbY
O/HOUSTON L&KE
CASCADIA RD SRDG l.d MI W OF CROSBY
11EPALES 211130'*
0000 FEET OEPTH CLASS UO
DATE
FROM
TO
74/09/08
74/10/07
74/11/09
74/12/09
75/01/24
75/02/19
75/03/22
75/04/18
75/04/30
75/05/13
75/05/29
75/06/13
75/07/27
75/08/26
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
11
10
10
10
09
10
09
09
09
10
09
12
09
11
15
30
15
20
45
00
30
50
30
15
15
10
25
15
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.032
.048
.016
.024
.056
.024
.025
.060
.025
.240
.200
.015
.135
.010
MG/L
2.
0.
0.
1.
4.
2.
1.
1.
0.
1.
0.
1.
0.
0.
000
600
600
100
400
100
400
350
900
600
900
650
600
550
00610 00671 00665
NH3-N PHOS-OIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
100
035
030
128
552
048
040
230
070
060
080
070
020
010
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
040
020
016
016
160
016
015
020
010
095
070
085
015
010
MG/L P
0.175
0.060
0.060
0.050
0.500
0.080
0.060
0.040
0.050
0.225
0.170
0.260
0.040
0.040
-------
STORET RETRIEVAL DATE 7c/03/10
4817N1
30 30 54.0 095 04 25.0 4
LITTLE CREEK
48 7.5 CAMILLA
T/HOUSTON LAKE
2NORY RD XING 0.7 MI SW JCT W HWY
11EPALES 2111204
0000 FEET DEPTH CLASS 00
150
DATE
FROM
TO
74/09/08
74/10/07
74/11/09
74/13/07
75/01/12
75/03/08
75/03/08
75/04/05
75/04/26
75/05/10
75/05/24
75/06/13
75/07/12
75/08/09
TIME DEPTH
OF
DAY FEET
11 00
10 15
11 10
10 30
10 45
10 10
10 45
10 50
15 45
10 00
10 30
11 35
10 10
13 30
00630
N02&N03
N-TOTAL
MG/L
0.036
0.040
0.024
0.056
0.024
0.008
0.007
0.015
0.025
0.030
0.030
0.025
0.060
0.050
00625
TOT KJEL
N
MG/L
0.100K
0.300
0.500
0.300
0.400
0.300
0.300
0.250
0.200
0.550
0.350
0.400
0.300
0.250
00610
NH3-N
TOTAL
MG/L
0.030
0.020
0.135
0.024
0.032
0.040
0.020
0.055
0.050
0.070
0.040
0.075
0.050
0.020
00671
PHOS-OIS
ORTHO
MG/L P
0.005
0.005
0.010
0.005
0.003K
0.008
0.005K
0.005K
0.005K
0.005
0.010
0.005
0.005K
0.005K
00665
PHOS-TUT
MG/L P
0.005
0.010K
0.010
0.010K
0.010
0.010K
0.010
0.010K
0.020
0.010K
0.010
0.010K
0.040
0.020
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
RETRIEVAL DATE 70/03/10
DATE TIME DEPTH N02&.N03
FROM OF
TO DAY FEET
74/10/07
74/11/09
74/12/07
75/01/12
75/02/08
75/03/08
75/04/05
75/04/26
75/05/10
75/05/24
75/06/14
75/07/12
75/08/09
10 30
11 30
10 50
10 55
11 00
11 00
11 05
16 00
10 20
10 45
11 15
10 20
13 50
4817P1
30 29 35.0 095 06 22.0 4
TARKINTON BAYOU
43 SAN JACINTU co
T/HOUSTON LAKE
2NDRY RD XING 3.5 MI SW JCT W HWY 150
11EPALES 2111204
0000 FEET DEPTH CLASS 00
|Q630
I&.N03
OTAL
IG/L
0.032
o.ooa
0.016
0.024
0.008
0.005
0.010
0.020
0.030
0.030
0.035
0.065
0.050
00625
TOT KJEL
N
MG/L
1.100
0.800
0.900
0.500
0.400
0.500
0.550
0.450
1.250
1.100
0.350
0.500
0.600
00610
NH3-N
TOTAL
MG/L
0.035
0.030
0.056
0.064
0.024
0.030
0.075
0.085
0.135
0.084
0.070
0.090
0.060
00671
PHOS-DIS
OrtTHO
MG/L P
0.030
0.010
0.024
0.008K
0.008K
0.010
0.005
0.005
0.010
0.005K
0.005
0.005K
0.005K
00665
PHOS-TOT
MG/L P
0.040
0.030
0.030
0.010
0.010K
0.030
0.020
0.043
0.010
0.030
0.010
0.050
0.030
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |