U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
CROSS U\KE
CADDO PARISH
LOUISIANA
EPA REGION VI
WORKING PAPER No, 538
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•&G.P.O. 699-440
-------
REPORT
ON
CROSS LAKE
CADDO PARISH
LOUISIANA
EPA REGION VI
WORKING PAPER No, 538
WITH THE COOPERATION OF THE
LOUISIANA WILD LIFE AND FISHERIES COWISSION
AND THE
LOUISIANA NATIONAL GUARD
MARCH, 1977
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REPORT ON CROSS LAKE
CADDO PARISH, LOUISIANA
EPA REGION VI
by
National Eutrophication Survey
Water and Land Quality Branch
Monitoring Operations Division
Environmental Monitoring & Support Laboratory
Las Vegas, Nevada
and
Special Studies Branch
Corvallis Environmental Research Laboratory
Corvallis, Oregon
Working Paper No. 538
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
March 1977
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I
CONTENTS
Page
Foreword ii
List of Louisiana Study Lakes iv
Lake and Drainage Area Map
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 6
IV. Nutrient Loadings 13
V. Literature Reviewed 19
VI. Appendices 20
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ii
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, concen-
trations, 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 nonpoint source pollution abatement in lake water-
sheds.
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
watershed 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 [ 3O3(e)], water quality criteria/standards review
L 3O3(c)], clean lakes [ 3l4(a,b)], and water quality monitoring
[ lO6 and §305(b)] activities mandated by the Federal Water
Pollution Control Act Amendments of 1972.
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111
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condition
are being made to advance the rationale and data base for refine-
ment of nutrient water quality criteria for the Nation’s freshwater
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 the U.S. Environmental Protection
Agency and to augment plans Implementation by the states.
ACKNOWLEDGMENTS
The staff of the National Eutrophication Survey (Office of
Research and Development, U.S. Environmental Protection Agency)
expresses sincere appreciation to the Louisiana Wild Life and
Fisheries Commission, Division of Water Pollution Control for
professional involvement, to the Louisiana National Guard for
conducting the tributary sampling phase of the Survey, and to
those Louisiana wastewater treatment plant operators who pro-
vided effluent samples and flow data.
Robert A. Lafleur, Chief; J. Dale Givens, Assistant Chief;
Lewis R. Still, Biologist; Louis Johnson, Biologist; Lee Cau-
barreaux, Biologist; Darrell Reed, Engineer; Dempsey Alford,
Biologist; and Elwood Goodwin, Water Quality Control Technician,
all of the Louisiana Wild Life and Fisheries Commission, Division
of Water Pollution Control reviewed the preliminary reports and
provided critiques most useful in the preparation of this
Working Paper Series.
Major General O’Neil Daigle, Jr., the Adjutant General of
Louisiana, and Project Officer Colonel Lawrence P. Dupre, who
directed the volunteer efforts of the Louisiana National Guards-
men, are also gratefully acknowledged for their assistance to
the Survey.
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iv
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF LOUISIANA
LAKE NAME PARISH
Anacoco Lake Vernon
Lake Bistineau Bienville, Webster
Black Bayou Caddo
Black Lake Natchitoches and Red River
Bruin Lake Tensas
Bundick Lake Beauregard
Caddo Lake Caddo (Menon and Harrison
in Texas)
Cocodrie Lake Concordja
Cocodrie Lake (Lower) Rapides
Concordia Lake Concordia
Cotile Lake Rapides
Cross Lake Caddo
D’Arbonne Lake Union
False River Lake Pointe Coupee
Indian Creek Reservoir Rapides
Saline Lake LaSalle
Turkey Creek Lake Franklin
Lake Vernon Vernon
Lake Verret Assumption
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CROSS LAKE
Tributary Sampling Site
Lak Sampling Site
Sewage Treatment Facility
Drainage Area Boundary
Km.
Mi.
I ui siana
Map Location
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REPORT ON CROSS LAKE, LOUISIANA
STORET NO. 2210
1. CONCLUSIONS
A. Trophic Condition:*
Survey data indicate that Cross Lake is eutrophic;
i.e., nutrient rich and highly productive. Whether such
nutrient enrichment is to be considered beneficial or
deleterious is determined by its actual or potential im-
pact upon designated beneficial water uses of the lake.
Chlorophyll a levels ranged from 8.7 ugh in March
to 73.8 pq/1 in June with a mean of 38.4 i.ig/l. Potential
for primary production as measured by algal assay control
yield was high. Of the 19 Louisiana lakes studied in 1974,
10 had greater median total phosphorus, 12 had greater
median dissolved orthophosphorus, and 14 had greater median
inorganic nitrogen than Cross Lake.
Survey limnologists reported algal blooms in August and
November. Ketelle and Uttormark (1971) state that Cross Lake
had past problems with brine from oil field operations, but
that this problem has been greatly curtailed.
*See Appendix E.
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2
B. Rate-Limiting Nutrient:
Algal assay results indicate that Cross Lake was limited
by available phosphorus levels during spring and autumn sampling.
The addition of phosphorus alone or nitrogen and phosphorus simul-
taneously resulted in increases in assay yield. No growth re-
sponse accompanied additions of nitrogen alone. Mean inorganic
nitrogen to orthophosphorus (N/P) ratios for the lake data, how-
ever, were 13/1 or less on all four sampling occasions, suggesting
nitrogen limitation.
C. Nutrient Controllability:
1. Point sources -
The mean annual phosphorus load from point sources was
estimated to be approximately 14.6% of the total load reach-
ing Cross Lake. The city of Waskom contributed this entire
point source load.
The annual phosphorus loading of 0.34 g P/m 2 /yr for
Cross Lake is less than Vollenweider’s (1975) eutrophic level
but greater than the oligotrophic level. However, loading
for at least one of the ungaged tributaries of Cross Lake
was probably underestimated (see Section IV-E). Any addition
to the existing phosphorus loading of this lake should be
carefully evaluated until a complete nutrient budget for the
lake can be determined.
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LIBRARY
3 U.S. Envt onmentaI P rotect1oa A eecV
Corva1li EnvLronc ent41 Reeeuh La.
200 s.w 35th Street
Cocv 1hs. Ov on 97330
2. Nonpoint sources -
The phosphorus load from nonpoint sources was 85.4% of
the total reaching the lake during the sampling year. Cross
Bayou contributed 14.3%, Paw Paw Bayou contributed 26.4%, and
the ungaged tributaries and immediate drainage were estimated
to have contributed 27.2% of the nonpoint source phosphorus
load. Loading calculations for Cross Lake yield a net export
of nitrogen, indicating sampling and/or estimation procedures
were not adequate to depict actual nitrogen loading and export
rates.
Regardless of the primary nutrient limitation suggested
by either algal assay or nutrient ratios, the most feasible
approach to nutrient control, if desirable, is through avail-
able phosphorus control technology and subsequent establish-
ment of phosphorus limitation within the water body.
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4
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are itemized below.
Lake morphometry was provided by the State of Louisiana; tribu-
tary flow data were provided by the Louisiana District Office of
the U.S. Geological Survey (USGS). Outlet drainage area includes
the lake surface area. Mean hydraulic retention time was obtained
by dividing the lake volume by mean flow of the outlet. Precipi-
tation values are estimated by methods as outlined in National
Eutrophication Survey (NES) Working Paper No. 175. A table of
metric/English conversions is included as Appendix A.
A. Lake Morphometry:
1. Surface area: 35.77 km 2 .
2. Mean depth: 2.7 meters.
3. Maximum depth: 3.3 met rs.
4. Volume: 95.719 x 106 m
5. Mean hydraulic retention time: 180 days.
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5
B. Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km 2 ) ( m 3 /sec )
A-2 Cross Bayou 132.9 0.99
C-i Paw Paw Bayou 208.5 1.54
E-i Shettleworth Bayou 25.5 0.19
F-i Logan Bayou 48.7 0.37
Minor tributaries and
ininediate drainage - 205.1 1.78
Totals 620.7 4.87
2. Outlets -
A-i Cross Bayou 655.3 4.85
B-i Shreveport Municipal
Water Supply Intake o.o 1.30
Totals 655.3 6.15
C. Precipitation:
1. Year of sampling: 156.1 cm.
2. Mean annual: 113.7 cm.
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6
III. LAKE WATER QUALITY SUMMARY
Cross Lake was sampled four times during the open-water
season of 1974 by means of a pontoon-equipped Huey helicopter.
Each time, samples for physical and chemical parameters were
collected from five stations on the lake and from one or more
depths at each station (see map, page v). During each visit,
depth-integrated samples were collected from each station for
chlorophyll a analysis and phytoplankton identification and enu-
meration. During the first and last visits, 18.9-liter depth-
integrated samples were composited for algal assays. Maximum
depths sampled were 1.5 meters at Station 01, 1.5 meters at
Station 02, 3.0 meters at Station 03, 1.5 meters at Station 04,
and 2.4 meters at Station 05. For a more detailed explanation
of NES methods, see NES Working Paper No. 175.
The results obtained are presented in full in Appendix C
and are summarized in Ill-A for waters at the surface and at
the maximum depth for each site. Results of the phytoplankton
counts and chlorophyll a determinations are included in Ill-B.
Results of the limiting nutrient study are presented in Ill-C.
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* N NO. OF SAMPLES
** MAXIMUM t)EPTH SAMPLED AT EACH SITE
PHYSICAL AND CHEMICAL CHARACTERISTICS
3 . 123/74 )
MAX
(
6/
3/74 )
MAX
( 8/26/74
5***
5
DEPTH
S•’* = S
DEPTH
S° °
5
RANGE i ANGE
RANGE MEDIAN (METE* S) NO MANGE MEDIAN (METERS)
MAX
DEPTH
RANGE
CPOSS LAXE
STO ET CODE 2210
PARAMETER NO
TEMPERATUkE (i)EG CENT)
0,—1,S M DEPTH 6
MAX OEPTH** 4
17.0— 17.6
17.0— 17.6
17.4
17.3
DISSOLVED OXYGEN (MG/U
O.—1.5 M OEPTri 4
MAX DEPTH** 4
1.8— 8.2
7.8— 6.2
8.1
8.1
CONDUCTIVITY (UMHOS)
0.—1.5 M DEPTH 6
MAX OEPTH** 4
111.— 135.
112.— 135.
115.
116.
PH (STANDARD UNITS)
0,—1.5 H DEPTH 6
MAX 0EPT14 00 4
6.9— 7.4
6.9— 7.4
7.0
7.0
TOTAL AL,(ALINITY (MG/L)
0,—1.5 M DEPTH 8
MAX OEPTH** 5
14.— 23.
14.— 24.
20.
20.
TOTAL P (M5/L)
0.—1.5 M DEPTH 8
MAX DEPTPI** 5
0.043—0.074
0.044—0.074
0.049
0.049
DISSOLVED ORTHO P (MG/L)
fl.—1.S H DEPTH 8
MAX OEPTI.l** 5
0.009—0.011
0.009—0.011
0.00
0.010
N02+t403 (NG/L)
0.—1.S M DEPTH 8
MAX DEPTH 4 ° S
0.050—0.090
0.050—0.090
0.075
0.080
AMMONiA (MG/L)
O . —1,S i DEPTH 8
MAX UEPTH** S
0.050—0.070
0.050—0.070
0.060
0.060
KJELDAI-4L N (MG/L)
0.—1.S H DEPTH 8
MAX OEPTr4** 5
0.600—0.800
0.600—0.800
0.700
0.600
SECCHI DISC (METERS)
5
0.8— 0.8
0.8
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0—
0.0-
0.0—
0.0—
0.0—
N*
RANGE
MEDIAN
(METERS)
1.5
8 26.3— 27.5
26.8
0.0—
1.5
9
27.4— 29.2
28.4
0.0—
1.5
3.0
S 26.0— 27.1
26.6
0.0—
3.0
5
27.4— 29.2
28.4
0.0—
3.0
1.5
3 5.8— 7.4
6.2
1.5—
1.5
9
3.6— 6.0
5.0
0.0—
1.5
3.0
4 5.8— 6.6
6.1
1.5—
3.0
5
4.0— 6.0
5.0
0.0—
3.0
1.5
8 204.— 245.
231.
0.0—
1.5
9
184.— 189.
185.
0.0—
1.5
3.0
5 204.— 239.
230.
0.0—
3.0
5
184.— 189.
185.
0.0—
3.0
1.5
8 7.5— 8.8
8.3
0.0—
1.5
9
6.9— ,5
7.3
0.0—
1.5
3.0
5 7.5— 8.7
7.8
0.0—
3.0
5
6.9— 8,5
7.3
0.0—
3.0
1.5
8 19.— 27.
22.
0.0—
1.5
9
34.— 39.
37.
0.0-
1.5
3.0
5 20.— 24.
22.
0.0—
3.0
5
34.— 39.
37.
0.0—
3.0
1.5
8 0.054—0.085
0.059
0.0—
1.5
9
0.154—0.210
0.179
0.0—
1.5
3,0
5 0.059—0.086
0.066
0.0—
3.0
5
0.154—0.210
0.177
0.0—
3.0
1.5
8 0.008—0.026
0.012
0.0—
1.5
9
0.071—0.090
0.080
0.0—
1.5
3.0
5 0.008—0.026
0.009
0.0—
3.0
5
0,074—0.089
0.080
0.0—
3.0
1.5
8 0.020—0.070
0.040
0.0—
1.5
9
0.020—0.040
0.020
0.0—
1.5
3.0
S 0.020—0.040
0.030
0.0—
3.0
5
0,020—0.020
0.020
0.0—
3.0
1.5
8 0.040—0.060
0.045
0.0—
1.5
9
0.020—0.060
0.040
0.0—
1.5
3.0
5 0.030—0.060
0.040
0.0—
3.0
5
0.040—0.060
0.060
0.0—
3.0
1.5
8 0.800—1.400
1.000
0.0—
1.5
9
0.800—1.600
1.200
0.0—
1.5
3,0
S 0.800—1.400
0.800
0.0—
3.0
5
0.600—1.600
1.000
0.0—
3.0
5 0.4— 0.6
0.5
5
0.5— 0.6
0.5
*** S = 40. OF SITES SAMPLED ON THIS DATE
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CPOSS LAKE
STC ET CODE 2210 PHYSICAL AM) CPItMICAL CI1A ACT€RIST1CS
11/11/74
IA AX
S*D* = S DEPTH
MANGE
PA A ETE i ANGE -MEDIAN (METEMS)
TEMPE ATIJ. E DEG CENT)
0.—1,5 14 DE ’TH 9 16.0— 18.1 17.4 0.0— 1.5
MAX DEPTH*Q 5 16.0— 1 .o 17.4 0.0— 3.0
OISSOLVEO OAYGEN (MG/L)
0.—l, . N DEi T.i 9 6.0— 12.8 P.2 0.0— 1.b
M6X OEI TH** S 8.2— 12.5 8.4 0.0— 3.0
CONDUCTIVITY (UMMOS)
0.—1.S N DEPTs 9 108.— 137. 119. 0.0— 1.5
MAX DEPTli * 5 108.— 135. 119. 0.0— 3.0
PH (STANDA 0 U 4ITS)
N DEPTH 9 6.4— 6.9 6.7 0.0— 1.5
MAX OEPTH** 5 6.4— 6.9 6.6 0.0— 3.0
TOTAL AL cALINITY (P40/L)
0 .—1 .5 14 I)EF’TI-4 8 18.— 21. 19. 0.0— 1.5
MAX DEPTH * 4 j4 .— 21. 20. 0.0— 3.0
TOTAL P (MG/L)
0.—1.5 H DEPTH 8 0.044—0.05b 0.048 0.0— 1.5
MAX OEPTHOD 4 0.048—0.058 0.052 0.0— 3.0
DISSOLVED Or THO P (MG/L)
0.—1.5 DEPTH 8 0.005—0.008 0.005 0.0— 1.5
MAX DEPT,1*Q 4 0.005—0.OOd 0.006 0.0— 3.0
N02.N03 (M&/L)
DEPTH 8 0.020—0.020 0.020 0.0— 1.5
MAX DEPTPi** 4 0.020—0.020 0.020 0.0— 3.0
AMMONIA ( G/L)
0.—1.5 H EPTd 8 0.020—0.030 0.020 0.0— 1.5
AX UEPTH*G 4 0.020—0.030 0.020 0.0— 3.0
JEL0 1 AHL N (MG/U
DEPTH 8 0.600—0.700 0.600 0.0— 1.5
MAX OEPTH** 4 0.500—0.700 0.600 0.0— 3.0
SECCHZ DISC (METERS)
5 0.6— 0.8 0•7
* N NO. OF SAMPLES
“ MAXIMUM DEPTH SAMPLED AT EACH SITE
*** S = NO. OF SITES SAi* LED ON THIS DATE
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9
B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
03/23/74
Dominant
Genera
1. Melosira
2. Pennate diatom
3. Microcystis
4. Lunate cell
5. Ankistrodesmus
Algal
Units
per ml
8,560
1 ,863
1 ,514
1 ,398
1 ,165
Other genera
Total
1. Anabaenopsis
2. Raphidiopsis
3. Chroococcus
4. Lyngbya
5. Anabaena
Other genera
Total
1. Anabaenopsis
2. Raphidiopsis
3. Merismopedia
4. Oscillatoria
5. Flagellates
Other genera
1. Dactj lococcopsis
2. Ankistrodesmus
3. Microcystis
4. Chroococcus
5. Merismopedia
Other genera
5,415
19,915
22,203
3,021
2,491
2,279
1 ,749
11,829
43,572
180,343
20,210
3,042
1,817
1 ,095
6,863
213,370
4,566
4,206
3,091
2,445
1 ,007
5,500
06/03/74
08/ 26/74
11/11/74
Total
Total 20,815
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10
2. Chlorophyll a -
Sampling Station Chlorophyll a
Date Number ( p /l) —
03/23/74 01 8.7
02 14.5
03 14.5
04 14.8
05 10.2
06/03/74 01 69.8
02 73.8
03 73.8
04 62.2
05 58.6
08/26/74 01 55.5
02 39.2
03 59.4
04 69.2
05 56.8
11/11/74 01 14.8
02 19.0
03 15.1
04 18.8
05 19.0
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11
11/11/74 - Stations 01-03
Ortho P
Conc. (mg/i )
0.012
0.062
0.062
0.012
- Stations 04-05
Ortho P
Conc. (mq/1 )
0.021
0. 071
0.071
0.021
Maximum Yield
( mg/i-dry wt. )
1.0
4.6
16.8
0.9
C.
Limiting Nutrient Study:
1.
Autoclaved, filtered, and
nutrient spiked
-
a. 03/23/74 - Stations
01-05
Ortho P
Spike(mg/1) Conc. (mg/i
Inorganic N
) Conc. (mg/i)
Control 0.007
0.05 P 0.057
0.05 P + 1.0 N 0.057
1.00 N 0.007
0.165
0.165
1.165
1.165
b.
Spike(mci/1 )
Control
0.05 P
0.05 P + 1.0 N
1.00 N
c. 11/11/74
Inorganic N
Conc. (mg/i )
0.055
0.055
1.055
1 .055
Maximum Yield
( mg/i-dry wt. )
2.2
5.1
19.0
2.4
Inorganic N Maximum Yield
Spike(mg/l ) ________ Conc.(mg/i) ( mg/i-dry wt. )
Control 0.113 4.1
0.05 P 0.113 5.4
0.05 P + 1.0 N 1.113 17.8
1.00 N 1.113 5.2
2. Discussion -
The control yield of the assay alga, Selenastrum capri-
cornutum , indicates that the potential for primary production
in Cross Lake was moderately high during spring and high at
the time of autumn assay sample collection. During autumn,
the potential for primary production was higher for lake
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12
Stations 04 and 05 than for Stations 01 to 03. This is possibly
due to the proximity of Stations 04 and 05 to the discharge of
tributary H-i, Unnamed Stream, which flows through Shreveport.
In all assays, growth response with the addition of phos-
phorus as well as the lack of response to the addition of nitro-
gen indicates phosphorus limitation. Maximum growth yield was
achieved with the simultaneous addition of both phosphorus and
nitrogen.
The mean N/P ratios for Cross Lake were 13/1 or less on all
four sampling occasions suggesting nitrogen limitation in the
lake (a mean N/P of 14/1 or more is considered indicative of
phosphorus limitation).
It should be noted that significant chemical changes took
place in Louisiana lake samples between collection and algal
assay. The assay data should be considered in this context and
until such differences are resolved, used with caution for any
prediction of actual lake conditions. Such chemical changes are
likely to alter the assay control yield as well as modify the
N/P ratio.
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13
IV. NUTRIENT LOADINGS
(See Appendix D for data)
For the determination of nutrient loadings, the Louisiana
National Guard collected monthly near-surface grab samples from
each of the tributary sites indicated on the map (page v), ex-
cept for the high runoff months of June and February when two
samples were collected. Sampling was begun in June 1974, and
was completed in May1975.
Through an interagency agreement, stream flow estimates for
the year of sampling and a “normalized” or average year were pro-
vided by the Louisiana District Office of the USGS for the tribu-
tary sites nearest the lake.
In this report, nutrient loads for sampled tributaries were
determined by using a modification of a USGS computer program
for calculating stream loadings. Nutrient loads indicated for
tributaries are those measured minus known point source loads, if
any.
Nutrient loadings for unsampled “minor tributaries and mime-
diate drainage” (“ZZ” of USGS) were estimated by using the mean
annual nutrient loads, in kg/km 2 /yr, in Paw Paw Bayou, Shettleworth
Bayou, and Logan Bayou at Stations C-l, E-l, and F—l, and multiply-
ing the means by the zz area in kjii 2 .
The operator of the Waskoni wastewater treatment plant provided
monthly effluent samples and corresponding flow data.
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14
A. Waste Sources:
1. Known municipal -
Population Mean Flow Receiving
Name Served* Treatment* ( m 3 /d x iO ) Water*
Waskom 1,460 Imhoff tank 0.659 Cross Bayou
2. Known industrial - None
*Treatment plant questionnaire.
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15
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
A-2 Cross Bayou 1,730 14.3
C-i Paw Paw Bayou 3,185 26.4
E-1 Shettleworth Bayou 255 2.1
F-i Logan Bayou 1,125 9.3
b. Minor tributaries and imediate
drainage (nonpoint load) - 3,280 27.2
c. Known municipal STP’s —
Waskom 1,770 14.6
d. Septic tanks* - 105 0.9
e. Known industrial - None
f. Direct precipitatjon** - 625 5.2
Totals 12,075 100.0
2. Outputs -
A-i Cross Bayou 10,060
B-i Shreveport Municipal
Water Supply Intake 1,905
Total 11,965
3. Net annual P accumulation - 110
*Estjmate based on 363 lakeside residences and 1 park.
**Estimated (see NES Working Paper No. 175).
-------
16
% of
kg N/yr total
A-2
Cross Bayou
C-i
Paw Paw Bayou
22,370
13.5
E—l
Shettleworth
Bayou
38,130
23.0
F-i
Logan Bayou
4,540
2.7
b. Minor tributaries and immediate
drainage (nonpojnt load) - 41,020 24.7
c. Known municipal SIP’s -
Waskom 5,670
d. Septic tanks* - 3,905
e. Known industrial - None
f. Direct precipjtatjon** - 38,615
Totals 165,950
A-i Cross Bayou
B-i Shreveport Municipal
Water Supply Intake
*Estimate based on 363 lakeside residences and 1 park.
**Estimated (see NES Working Paper No. 175).
***Export probably due to unknown sources and/or sampling error.
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
Source
a. Tributaries (nonpoint load) -
2. Outputs —
3.4
2.4
23.3
100.0
131 ,460
36,320
Total 167,780
3. Net annual P export*** - 1,830
-------
17
D. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
Tributary kg P/km 2 /yr kg N/km 2 /yr
Cross Bayou 13 168
Paw Paw Bayou 15 183
Shettleworth Bayou 10 178
Logan Bayou 23 240
E. Mean Nutrient Concentration in Ungaged Streams:
Mean Total P Mean Total N
Tributary ( mg/i) ( mg/i )
D-l Piney Bayou 0.068 0.944
G-i Aqueduct from
Twelvemile Bayou 0.125 0.869
H-i Unnamed Stream 0.333 1.580
Nutrient levels in tributaries D-l (Piney Bayou) and G-l (Aque-
duct Bayou) are roughly in line with the other gaged tributaries en-
tering Cross Lake. However, levels for H-i (Unnamed Stream) were sub-
stantially higher. This is probably attributable to the fact that
Unnamed Stream runs through the western residential section of Shreve-
port.
-------
18
F. Yearly Loadings:
In the following table, the existing phosphorus annual
loading is compared to the relationship proposed by Vollenweider
(1975). Essentially, his “eutrophic” loading is that at which
the receiving waters would become eutrophic or remain eutrophic;
his “oligotrophic” loading is that which would result in the
receiving water remaining oligotrophic or becoming oligotrophic
if morphometry permitted. A “mesotrophic loading would be
considered one between “eutrophic and “oligotrophic”.
Note that Vollenweider’s model may not apply to lakes with
short hydraulic retention times or in which light penetration is
severely restricted by high concentrations of suspended solids
in the surface waters.
Total Yearly
Phosphoru Loading
(g/m /yr)
Estimated loading for Cross Lake 0.34
Vollenweider’s “eutrophic” loading 0.46
Vollenweider’s “oligotrophic” loading 0.23
-------
19
V. LITERATURE REVIEWEC
Ketelle, Martha 3. and Paul D. littormark. 1971. Problem Lakes
in the United States. U.S. Environmental Protection Agency
Project #16010 EHR. University of Wisconsin, Madison, Wisconsin.
U.S. Environmental Protection Agency. 1975. National Eutrophication
Survey Methods 1973—1976. Working Paper No. 175. National
Environmental Research Center, Las Vegas, Nevada, and Pacific
Northwest Environmental Research Laboratory, Corvallis, Oregon.
Vollenweider, R. A. 1975. Input-Output Models With Special
Reference to the Phosphorus Loading Concept in Limnology.
Schweiz. Z. HydroT.. 37:53-84.
-------
20
APPENDIX A
CONVERSION FACTORS .
-------
CONVERSION FA(;TORS
Hectares x 2.471 acres
Kilonieters x 0.6214 = miles
Meters x 3.281 feet
Cubic ilicters x 8.107 x 1O = acre/feet
Square kjIorueters x 0.3861 square miles
Cubic meters/sec x 35.315 cubic feet/sec
Centimeters x 0.3937 inches
Ki1ogram x 2.205 pounds
Kilograms/square kilometer x 5.711 = lbs/square mile
-------
APPENDIX B
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFO, MATION4 FOR tOUIS!ANA
04/11/77
6 74
7 74
8 74
10 74
U 74
12 74
1 75
2 75
3 75
4 75
5 75
6 74
7 74
8 74
10 74
11 74
12 74
1 75
2 79
3 75
4 75
5 75
TOTAL DRAINAGE AREA OF 1.AKE
SUM OF SUB—DRAINAGE AREAS =
22. 7 95
0.176
0.051
0.736
12.0 35
10.760
20. 105
25.995
18.746
3.879
22.399
4.616
0.878
0.010
0.153
2.435
2.180
4.078
5.267
3.794
Q,793
4.531
LAKE CODE 2210
C?OSS LAKE
TOTAL O AINAGE AREA OF LAKE(S0 KM)
SU8 —DR A I NA GE
AREA(S K l)
655.3
132.9
0.0
208.5
25.5
48.7
655.3
MAR
8.72
1.784
1 • 19
2.775
0 • 340
0.651
3.200
7.22
1 .472
1.22
2.294
0.280
0.538
2.662
FE
9.80
1.982
1.16
3.115
0.368
0.736
3.596
NOV
JUL
AUG
SEP
OCT
APR
MAY
11.67
6.68
3.28
0.651
0.62
0.125
0.18
0.037
1.08
0.218
0.76
0.156
2.32
0.481
6.34
1.274
2.379
1.359
1.44
1.53
1.56
1.22
1.27
1.19
1.16
1.30
1.33
1.048
0.195
0.057
0.340
0.244
0.736
2.010
3.710
2.124
0.127
0.023
0.006
0.042
0.028
0.091
0.246
0.453
0.261
0.246
0.045
0.01’.
0.079
0.057
0.190
0.481
0.878
0.510
0.227
0.065
0.396
0.280
0.850
2.322
TPI8UTA Y
221081
221082
221081
22 10C1
2210E1
Z2 lvF l
2? 10 ZZ
TRIBUTARY
221041
221082
DEC “EAN
MEAN MONTMLY FLOWS AND DAILY FLOWS(CMS)
MONTM YEAR MEAN FLOW DAY
4 • 85
0 • 986
1.30
1.542
0.187
0.366
1 • 783
TOTAL FLOW IN =
TOTAL FLOw OUT =
FLOW
74.39
58.68
655.3
656.4
FLOW DAY
9 130.257
5 0.017
12 0.017
1 0.054
7 2.662
7 62.297
7 13.054
5 79.004 26
23 5.040
5 2.124
3 57.200
9 24.069
5 0.088
12 0.003
7 0.011
7 0.538
7 12.743
7 2.633
5 15.999 26
23 1.019
5 0.425
3 11.582
SUMMARY
FLOW DAY
0.850
-------
TRIBUTARY FLO INFORMATION FOR LOUISIANA 04/11/77
LME CODE ‘?lC CROSS LAKE
MEAN MONTHLY FLO*S AND OAILY FLOWS(CMS)
TRI8uTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
221 I 6 74 1.453 9 1.152
7 74 1.540 5 1.229
8 74 1.546 12 1.475
10 74 1.274 7 1.359
11 74 1.189 7 1.218
12 7 1.161 7 1.133
1 75 1.218 7 1.218
2 75 1.161 5 1.133 26 1.133
3 75 1.189 23 1.189
4 75 1.303 5 1.303
5 75 1.331 3 1.274
221CC I 6 74 7.249 8 79.570
7 74 0.275 5 0.028
8 74 0.016 12 0.006
10 74 0.238 7 0.017
11 74 3.823 7 0.850
12 74 3.626 7 19.822
1 75 6.201 7 4.021
2 75 8.014 5 24.324 26 1.303
3 75 5.777 23 1.557
4 75 1.189 5 0.651
5 75 6.909 3 17.613
2210E1 6 74 0.878 9 4.729
7 74 0.034 5 0.003
8 74 0.003 12 0.001
10 74 0.028 7 0.003
11 74 0.481 7 0.105
12 74 0.425 7 2.435
1 75 0.821 7 0.113
2 75 1.019 5 3.058 26 0.113
3 75 0.73 23 0.198
4 75 0.150 5 0.085
5 75 0.878 3 2.209
2210F1 6 74 1.699 9 9.061
7 74 0.065 5 0.006
8 74 0.003 12 0.003
10 74 0.057 7 0.040
11 74 0.906 7 0.198
12 74 0.793 7 4.616
1 75 1.501 7 0.963
2 75 1.926 5 5.862 26 0.311
3 75 1.388 23 0.368
4 75 0.283 5 0.057
5 75 1.671 3 4.248
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
STORET RETRIEVAL DATE 75/12/11
ATL EUT CPHICAT10N 5 JPVEY
EPA—LAS VEGAS
74/03/23 14 20 0000
74/06/03 10 35 0000
10 35 0001
10 35 0004
10 35 0005
74/08/26 10 40 0000
74/11/11 11 20 0000
U 20 0005
00665 32217
P805—ToT CHLRPHYL
A
M(,/L P UG/L
0.0 66
0.163
0.046
0.0 55
00031
INCOT LI
REMNING
PERCENT
221001
32 31 45.0 093 4 58.0
CROSS LAKE
22 LOUISIANA
I1EPALES 2111202
0005 FEET
4
DATE
TIME
DEPTH
FROM
OF
TO
DAY
FEET
74/03/23
14 20
0000
74/06/03
10 35
10 35
0000
0005
74/08/26
10 40
0000
74/11/11
11 20
11 20
000fl
0005
DATE
TIME
DEPTH
FROM
OF
TO
DAY
FEET
00010
00300
00077
00094
00400
00410
O Oo lO
0062b
00630
00671
MATER
DO
TI4ANSP
CNDUCTVY
P8
1 ALPO
N’-13—N
TOT KUEL
N02&N03
P44OS—Dj5
TEMP
SECCHI
FIELD
CACO3
TOTAL
N
N—TOTAL
OPT’iO
CENT
MG/L
INCHES
MICROMHO
SU
MG/L
MG/L
MG/L
MG/L
MG/L
17.6
7.8
30
135
7.00
14
0.060
0.700
0.050
0.011
27.5
17
245
8.45
27
0.050
1.000
0.070
0.008
27.1
6.2
239
7.80
22
0.040
0.P400
0.040
0.008
29.2
6.0
18
189
8.53
34
0.040
1.600
0.020K
0.077
17.4
7.8
27
137
6.54
21
0.020
0.600
0.020K
0.005
17.4
8.4
135
6.43
21
0.020
0.600
0.020K
0.007
0.0 44
0.057
8.7
69.8
55.5
14.8
50 • 0
1.0
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
STORET RETRIEVAL L)ATE 75/12/il
NATL EUTROPH1CATIO J Su’ vEY
EPA—LAS VEGAS
00665 32217
Pi-IOS—TOT CHLRPHYL
A
MG/L P IJG/L
00031
INCOT LT
PEMNI IG
PERCENT
221002
32 31 40.0 0’ 3 51 45.0
CRUSS LAKE
22 LOUISI4( A
IIL PALES 211120&
0009 FEET UE TH
74/03/23 14 30 0000
14 30 0005
14/06/03 09 05 0000
09 05 0001
09 05 0004
09 05 0005
74/08/26 10 15 0000
10 15 0004
74/11/11 11 35 0000
11 35 0005
0 • 046
0 • 049
0 • 061
0.059
0.170
0.154
0.049
0 • 048
50 • 0
1.0
4
DATE
TIIE
DEPT’
FROM
OF
To
DAY
FEET
74/03/23
14 30
14 30
0000
0005
74/06/03
09 05
09 05
0000
0005
74/08/26
10 15
10 15
0000
0004
74/11/11
11 35
11 35
0000
0005
DATE
TIME
DEPTH
F QM
OF
TO
DAY
FEET
00010
00300
00077
0 00Q4
00400
00410
00610
O Oe,25
00630
00b71
wATE
00
TNANSP
C ouCTvY
P
T ALK
NH3—N
TOT KJEL
NO2 N03
PHOS—DIS
TEMP
SECCHI
FIELD
CACO3
TOTAL
N
h—TOTAL
Oe4THO
CENT
t46/L
INCr ES
MICROMMO
SU
MG/L
MG/L
MG/L
MG/L
MG/L P
17.5
32
111
7.40
16
0.050
0.700
0.050
0.009
17.4
8.2
112
7.40
20
0.070
0.600
0.OQ O
0.010
26.3
?l
205
7,50
21
0.060
1.000
0.060
0.014
26.3
5.8
204
7.50
22
0.040
0.’400
0.040
0.026
28.4
6.0
18
185
8.11
36
0.020
1. 00
0.020K
0.078
28.4
5.4
184
8.12
37
0.060
1.400
0.020
0.089
18.1
8.2
27
119
.71
20
0.030
0.600
0.020K
0,005
18.0
12.8
119
6,54
18
0.0?OK
0.600
0.020K
0.005
14.5
73.8
39.2
19.0
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
STORET RETRIEVAL DATE 75/12/11
NATL EUTR0P ICATI0 SuRVEY
EPA—LAS VEGAS
221003
32 30 15.0 093 50 55.0
C. 0SS LAKE
22 LOUISIANA
1 1EPALES
4
211 12 2
0014 FEET 1 E’1P-4
74/03/23 13 45 0000
13 45 0005
13 45 0010
74/06/03 10 10 0000
10 10 0001
10 10 0005
10 10 0010
74/08/26 10 00 0000
10 00 0005
10 00 0010
74/11/11 11 50 0000
11 50 0005
11 50 0010
00665 32217
PHOS—TOT CHLRPHYL
A
MG/L P UG/L
0.051
01043
0 • 045
0.060
0.054
0.060
0, 179
0.171
0.177
0.046
01044
0 • 050
00031
INCDT LT
REMNING
PEkCE T
DATE
Fi 1OM
To
TIME DEPTh
OF
DAY FEET
74/03/23 13 45 0000
13 45 0005
13 45 0010
74106/03 10 10 0000
10 10 0005
10 10 0010
74/08/26 10 00- 0000
10 00 0005
10 00 0010
74/11/11 11 50 0000
11 50 0005
11 50 0010
00010
00300
00077
00094
00400
00410
00610
00
00630
00671
4TER
DO
Ti ANSP
CNOUCTV r
PH
1 ALK
NH3—N
TOT iJEL
N02&N03
PHOS—DIS
TEMP
SECCHI
FIELD
CACU3
TOTAL
N
N—TOTAL
O THO
CENT
MG/L
INCHES
MIC WMHO
SU
MG/L
MG/L
MG/L
MG/L
M3/L P
17.5
30
115
6.95
22
0.060
0.700
0.070
0.010
17.4
8.0
115
6.95
23
0.060
0.600
0.080
0.009
17.3
8.0
115
6.95
24
0.060
0.600
0.080
0.009
26.9
20
231
8.70
19
0.050
1.400
0.020
0.011
26.6
7.4
230
8.20
21
0.060
0.900
0,040
0.011
26.6
6.6
230
8.20
20
0.030
0.iO O
0.020K
0.008
28.4
5.0
24
185
7.31
37
0.060
1.300
0.020K
0.090
28.4
5.0
186
7.28
37
0.030
0.900
0.020K
0.086
28.4
5.0
185
7.32
36
0.060
1.000
0.020
0.081
17.9
6.0
33
124
6.77
19
0.020
0.600
0.020K
0.005
17.8
7.6
122
6.49
18
O.0?O
0.600
0,020K
0.005
17.8
8,4
123
6.65
20
0.020K
0.500
0.020K
0.005
DATE
FROM
TO
TIME DEPTI-4
OF
DAY FEET
14.5
73.8
59.4
15.1
50.0
1.0
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
STORET RETRIEVAL i)AT€ 7 /1 .’11
NAIL EUTH0PHICATIO SURVEY
EPA—LAS VEGAS
00665 32217
PHOS—TUT CHLRPHYL
A
MG/L P UG/L
00031
INCDT LI
REMNING
PEkCENT
c 2l 004
32 29 45.0 093 48 50.0
C OSS LAKE
LOUISIANA
1 IEPALES 1112O2
0005 FEET r ’1P
74/03/23 14 50 0000
74/06/03 09 35 0000
09 35 0001
09 35 0004
74/08/26 09 30 0000
09 30 0005
74/11/11 14 00 0000
50.0
1.0
L)ATE
FROM
TO
TIME DEPTH
OF
DAY FEET
‘4
74/03/23 14 50 0000
74/06/03 09 35 0000
74/08/26 09 30 0000
09 30 0005
74/11/11 14 00 0000
00010
00300
00077
000’ ) ’
00400
00410
00610
OOt2 S
00630
0 0b71
WATER
DO
TWANSP
CI1DtJCTVY
PH
T ALK
NH3—N
TOT KJEL
NO2 NO3
PrIOS—OIS
TEMP
SECCIII
FIELD
CACO3
TOTAL
N
N—TOTAL
O . T O
CENT
4G/L
INCHES
MIC’ OMHU
Su
MG/L
MG/L
MG/L
MG/L
MG/L P
17.0
8.2
30
117
6.95
23
0.070
0.H00
0.090
0.011
26.9
20
226
8.70
24
0.040
1.400
0.030
0.019
28.1
3.6
18
187
6.87
37
0.030
1.60fl
0.040
0.071
28.1
4.0
186
6.91
37
0.040
o. o0
0.020
0.074
16.0
8.4
25
108
6.83
19
0.030
0.700
0.020K
O.0O
DATE
FROM
TO
TIME DEPTH
OF
DAY FEET
0.074
0.085
0.195
0.210
0.058
14.8
62.2
69.2
18.8
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
STO#ET PEJkIEV&L DATE 7b/12/11
NAIL EUTriOP i1CAT1O jp tY
EPA—LAS VEGAS
2100S
32 30 25.0 093 48 00.0
C’ OSS LA cE
22 L0UISIA 1A
1 1EI- LE6
4
211 l2
0010 FEET 0E-1-i
14 10 0000
14 10 0005
09 50 0000
09 50 0001
09 50 0004
09 50 O00
09 40 0000
09 40 0004
14 10 0000
00665 32217
Pp40S—T0T CHLRPHYL
A
M(i/L P UG/L
0.050
0 • 049
0 • 057
0.086
0.196
0.192
0.054
00031
INCDT LT
EMN1NG
PERCENT
?0 .0
1.0
DATE
TIME
DEQTk
FI Ou
OF
TO
OAt’
FEET
74/03/23
14 10
14 10
0000
0005
74/06/03
09 50
09 50
0000
0008
74/08/26
09 40
09 40
0000
0004
74/11/11
14 1 )
14 10
000fl
000”
DATE
TIME
OEPT,4
FROt
OF
TO
DAY
FEET
00010
00300
uOI)77
000 ’.
00400
00’10
00610
00b S
00630
00t 71
t iTEP
DO
TI iANSP
Ct, D1’CTVv
Ps . ,
T AL
NPI3—N
TU1 P J L
NO?&N03
Pp.tOS—OIS
TEi 4P
SECC’-iI
FIELD
CACO3
TOTAL
N
“ —T0TAL
O9TrtO
CENT
MG/L
INCHES
MIC 0MHO
SIi
Mc3/L
MG/L
MG/L
MG/L
MC,/L P
30
20
16
0.060
0.OSO
0.700
O.e,00
0.080
0,0’,0
0.009
0.009
26.7
25
231
8,85
21
0.040
1.000
0.020
0.013
26.0
6.0
??36
7.60
21
0.060
0. 0o
0.030
0.009
27.5
3.6
24
185
6.92
.i’
0.060
1.100
0.020K
0.087
27.4
4.0
185
6.93
39
0.060
0, 40u
0,020K
0.080
16.5
8.0
26
118
6.90
19
0.020K
0. O0
0.0. ?OK
0.005
lb.4
8.??
118
6.88
74/03/23
74/ 06/0 3
74/08/26
74/11/11
10.2
58.6
56.8
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
APPENDIX 0
TRIBUTARY AND WASTEWATER
TREAThENT PLANT DATA
-------
STORET RETRIEVAL DATE 77/04/11
ITYPA/AABNT/STPFAM
2210A 1
32 30 50.0 093 ‘+7 50.0 4
CROSS 8AYOu
22 7.5 N MIG,ILANDS
0/CROSS LArSE 101691
2NDI Y RD RDG BELOw CP OSS Lt< DAM SPILL A
11EP LES 04001004
0000 FEET DEPTR CLASS 00
00630
00625
0 610
00671
00665
DATE
TIME
DEPTr-f
NO2 NO3
TOT KJEL
NtI3N
P1IOSOIS
PHOS—TOT
FROM
O
N—TOTAL
N
TOTAL
ORTHO
TO
DAY
FEET
MG/L
LIG/L
MG/L
MC-/L P
MG/L P
74/06/06
14 ic
0.100
2.300
0.105
0.010
0.070
74106/09
09 15
0.012
1.200
0.010
0.010
0.045
74/07/05
14 00
0.052
1.000
0.040
0.010
0.085
74/08/1?
10 40
0.072
1.200
0.075
0.015
0.080
74/10/07
10 ?‘)
0.032
0.800
0.035
0.015
0.080
74/11/07
13 35
0.02’
0.600
).185
0.080
0.130
74/12/07
09 30
0.008
0.600
0.015
0.010
(j.035
75/01/07
10 0()
0.008
0.400
0.008
0.005
0.030
75/02/05
08 35
0.032
0.850
0.048
0.048
0.145
75/02/26
0.016
0.550
0.056
0.016
0.060
75/03/23
09 ic
0.007
1.000
0.032
0.007
0.040
75/04/05
09 30
0.005
0.550
0.015
0.010
0.050
75/05/03
08 30
0.015
0.750
.035
0.010
0.040
-------
STORET RETRIEVAL DATE 77/0 1 ./i l
/TYPA/AMbNT/STPEAM
221uA2
32 29 30.0 094 56 30.0 4
CROSS BAYOU
22 15 0’ EENwOOD
T/C OSS LAKE: 120191
UNJ iPr OVED () XING I MI N JEFFESON r 4GE
I1EPALES 04001004
0000 FEET DEPTr$ CLASS 00
00630
00625
00610
00671
00665
DATE
TIME DE T’4 NO2 .NO3
TOT KJEL
Nr13—N
PI-IOS—DIS
PMOS—TOT
FROM
O
N—TOTAL
N
TOTAL
ORTHO
TO
DAY
FEET
MC’/L
l6/L
MG/L
M6/L P
MG/L
74/08/06
15 0
0.132
1.000
0.055
0.300
0.390
74/06/09
15 45
0.032
0.600
0.035
0.030
0.070
74/07/05
11 40
0.092
0.600
0.065
0.065
0.160
74/08/12
14 00
0.028
0.700
0.080
0.100
0.180
74/10/07
12 30
0.056
0.600
0.040
0.135
0.210
74/11/07
10 45
0.024
0.900
0.095
0.040
0.090
74/12/07
13 15
0.024
1.100
0.040
0.050
0.150
75/01/07
10 00
0.032
0.600
0.024
0.035
0.140
75/02/05
09 25
0.016
1.100
0.064
0.016
0.050
75/02/26
0.032
1.500
0.104
0.024
0.070
75/03/23
12 05
0.032
0.400
0.032
0.064
0.090
75/04/05
12 4
0.025
0.700
0.030
0.030
0.040
75/05/03
12 15
0.085
1.150
0.090
0.035
u.120
-------
STORET RETRIEVAL DATE 77/04/11
/TY2A/AMBNT/STPEA
221031
32 30 45.0 093 i.7 30.0 4
Sr4RE EPORT MNCPL wATE
22 7.5 N hIGHLANDS
O/C OSS LA SE 101691
RA wTR TAP AT SPLwAY SIN NEAR AMISS PLT
I IEPALES 04001004
0000 FEET OE TH CLASS 00
00630
00625
0fl610
00671
00665
DATE
TIME
DEPTH
N02&N03
TOT KJEL
N l3—N
PI- OS—DIS
PHOS—TOT
FROM
OF
N—TOTAL
N
TOTAL
OPTHO
TO
DAY
FEET
MG/L
MG/L
M( /L
MG/L P
MG/L P
74/06/06
08 50
0.020
2.100
0.070
0.010
0.075
74/06/09
12 35
0.008
0.950
0.010
0.010
0.063
74/07/05
15 00
0.012
1.242
c.025
0.010
0.050
74/08/12
11 05
0.00
1.800
0.020
0.015
0.080
74/10/07
10 30
0.032
0.700
0.025
0.010
0,040
74/11/07
11 On
0.00
0.900
0.030
0.010
0.040
7’/12/07
09 c
0.008
0.600
0.010
0.005
0.050
75/01/07
10 15
0.008
0.500
0.016
0.005
0.030
75/02/05
09 05
0.016
0.400
0.016
0.008
0.050
75/02/26
0.008
1.100
0.056
0.008K
0.040
75/03/23
09 30
0.016
0.800
0.016
0.008
0.040
75/04/05
09 5
0.005
0.650
0.040
0.005
0.010
75/05/03
09 00
0.015
0.d50
3.030
0.005K
0.030
K VALUE r(’iOWN ro B
LESS Ti -fAN INDICMTEO
-------
5T)RET RETRIEVAL DATE 77/04/U
/ T Y PA / ‘ N T / ST E AM
2210C1
32 31 00.0 093 58 20.0 4
PA PA t3AYOU
22 15 OORINGSPORT
T/C USS LAIcE 101691
LA ri 16 DG 3.5 P4 S OF LONGW000
LIEPALES 04001004
0000 FEET DEPTh CLASS 00
60630
00625
00610
00671
00665
DATE
TIME
DEPTII
N02&N03
TOT KJEL
Nh3—N
PHOS—DIS
PP-lOS—TOT
FROM
OF
N—TOTAL
N
TOTAL
ORTr IO
TO
DAY
FEET
MG/L
MG/L
MC,/L
MG/L P
MG/L P
74/06/06
13 10
0.044
0.600
0.185
0.030
0.065
74/06/08
15 10
0.028
0.700
0.035
0.030
0.110
74/07/05
11 15
0.00 ’ .
0.700
0.015
0.005
0.055
74/08/1?
13 40
0.032
0.600
0.035
0.030
0.050
74/10/07
11 50
0.048
0.600
0.070
0.020
0.070
74/11/07
13
0.008
1.100
0.060
0.040
0.080
74/12/07
0.008
0.800
0.020
0.030
0,100
75/01/07
12 30
0.008
0.600
0.032
0.016
0.050
75/02/05
11 15
0.008
0.500
0.016
0.024
0.050
75/02/26
0.008
0.600
0.032
0.016
0.040
75/03/23
12 15
0.024
0.500
0.024
0.016
0.060
75/04/OS
12 15
0.010
0.650
0.025
0.015
0.015
75/05/03
11 30
0.145
1.400
0.145
0.030
0.110
-------
STORET RETRIEVAL DATE 77/04/11
/ I Y P4/ A ‘ 8N T 1ST P
221001
32 32 10.0 093 58 25.0 4
PINEY 8AYOU
22 15 MOORIt4GSPORT
1/CROSS LAKE 101691
LA HwY 169 ROG 2 M I S OF LONGW000
1 1EPALES 04001004
0000 FEET DEPTh CLASS 00
00630
00625
00610
00671
00665
DATE
TIME
DFPT’-i
NO2 NO3
TOT KJEL
NH3—N
PHOS—DIS
PHOS—TOT
FROM
OF
N—TOTAl..
N
TOTAL
ORTHO
TO
DAY
FEET
MG/L
4G/L
MC,/L
MG/L P
M&/L P
74/06/06
11 03
3.0’ 8
1.200
0.315
0.040
0.092
74/06/09
10 50
0.044
1.400
fl.045
0.026
74/07/05
11
10
0.112
0.500
0.080
0.060
0.105
74/08/12
13 30
0.0 16
0.800
0.130
0.050
0.120
74/10/07
11 35
0.048
1.300
0.168
0.020
0.060
74/11/07
12 55
0.016
0.800
3.780
0.020
0.060
74/12/07
12 45
O.02 .
0.900
0.030
0.020
0.070
75/01/07
1? 15
0.048
0.500
C.032
0.010
0.040
75/02/05
10 35
0.032
0.700
0.040
0.016
0.050
75/02/26
0.040
1.065
0.080
0.016
0.045
75/03/23 11 Sr I
75f04/0512 05
75/05/03 11 45
0.048
0.055
0.070
0.400
0.650
1.450
0.032
0.040
0.175
0.016
0.015
0.015
0.050
0.015
0.110
-------
STui ET RETPrEVAL DATE 77/04/li
/TypA/A’A8NT/STCE
2210E1
32 34 00.0 093 56 30.0 4
SrETTLEWO 1- 8AYOU
22 15 MOORINOSPORT
T/ QSS LAKE 101691
dND Y RD OG 2.? MI E OF LONC,w000
I 1EPALES 04001004
0000 FEET DE TI i CLASS 00
00630
00625
O )oiO
00671
00665
DATE
TIME
DEPT -I
NO2 NO3
TOT KJEL
NH3—N
PhOS—DIS
PhOS—TOT
FROM
OF
N—TOTAL
N
TOTAL
ORT hO
TJ
DAY
FFET
MG/L
MG”L
MG/L
MG/L P
MG/L P
74/06/06
0.064
0.900
0.345
0.100
0.140
74/06/09
14 30
0.036
1.400
0.050
0.020
74/07/05
10 5
0.136
0.500
0.055
0.025
0.050
74/08/12
13
10
0.036
0.600
0.110
0.014
0.135
74/10/07
11 75
0.048
0.700
u.115
0. 040
0.085
74/11/07
12 50
0.008
0.700
0.040
0.045
0.010
74/12/07
12 00
0.016
0.700
0.035
0.010
0.050
75/01/07
11 45
0.016
0.300
0.016
0.010
0.020
75/02/05
10 15
0.010
0.500
0.035
0.015
0.040
75/02/26
0.008
0.400
0.028
0.008
0.030
75/03/ 3
11 30
0.024
0.300
0.024
0.008
0.030
75/04/05
11 50
0.005
0.350
0.020
0.010
0.010
75/05/03
11 15
3.080
2.200
0.280
0.025
-------
STOi ET RETRIEVAL DATE 77/04/11
/TYPA/AM8NTfSTREA
221 OF 1
32 32 35.0 053 51 53.0 4
L0C AN RAYOU
22 1.5 N iIG LANOS
T/C OSS LAKE 101691
Nr( UNMP t) 80 1 M * I ANSAS CITY P XING
11Et ALES 04001004
0000 FEET DEPTi CLASS 00
00b30
00625
0 610
00671
DATE
TIME DEPTH
N024N03
TOT KJEL
Nr13—N
PhOS—DIS
FROM
OF
N-TOTAL
T0T L
ORTHO
TO
DAY
FEET
MG/L
MG/L
MC)/L
1G/L P
MG/L
74/06/06
13
45
C.044
1.100
0.410
0.110
0.190
0.110
74106/09
13
0.116
1.100
0.125
0.045
74/07/05
10
30
0.232
1.100
0.280
0.035
0.125
74/08/12
12
15
0.028
1.300
0.400
0.050
74/10/07
11
0.06 ’.
0.800
0.145
0.085
74/11/07
12
30
0.032
0.600
0.125
0.055
0.100
74/12/07
11
25
o.200
1.300
0.065
0.035
75/01/07
11
15
0.128
0.650
0.032
0.020
0.060
0.120
75/02/05
12
20
0.152
0.300
0.064
3.040
75/02/26
0.072
0.600
0.032
0.016
0.070
75/03/23
10
01)
0.112
0.500
0.032
75/04/05
11
15
0.155
0.775
0.115
0.030
0.120
75/05/03
11
00
0 .140
1.250
0.200
0.045
-------
STOPET RETRIE:vAL DATE 77/0’e/11
/1 y P4/ A BN TI ST E A
2210G1
32 32 05.0 093 47 25.0 4
AOUEDUCT T ELVEM.ILE dAY
22 7.5 N 1IGHL4NOS
T/C 0SS L SE 1016 1
PUMPING STATION AT TWELVEMILE BAYOU
I IEPALES 0’.001004
0000 FEET DEPTI- CLASS 00
00630
00625
00610
00671
00665
DATE
TIME
DEPT 4
NO2 .NQ3
TOT KJEL
NN3—N
PHOS—DIS
PHOS—TOT
FROM
OF
N—TOTAL
N
TOTAL
OPT-b
TO
DAY
FEET
G/L
MG/L
M(/L
MG/L P
MG/L P
74/06/06
14 10
0.044
1.53C
C.050
Q.09
0.214
74/06/09
11 45
0.100
1.200
0.025
0.085
0.315
74/07/05
10 05
0.032
0.600
0.050
0.015
0.075
74/08/12
11 50
0.004
0.600
0.020
0.010
0.050
7 /10/07
10 00
O.02 ’
0.600
0.040
0.015
0.063
74/11/07
10 0
,. 104
0.400
.097
0.U35
0.Ci80
74/12/07
OQ 00
0.032
1.500
j.020
0.043
3.143
75/01/07
09 00
0.024
0.490
0.016
0.015
0.0 O
75/02/05
12 50
0,032
0.700
0.032
0.040
0.130
75/02/26
0.00
0.500
0.016
0.016
0.080
75/03/23
09 00
0.024
0.600
0.016
0.016
0.060
75/04/OS
OQ 00
0.005
0.400
0.025
0.010
0.020
75/05/03
09 15
0.220
1.850
0.210
0.065
0.3 50
-------
STD ET PET .EVAL D4Tr 77/ 4/11
/TY/ANT/ST
2210-41
32 29 10.0 093 ‘ b 0.0 4
U’ aNAMEL) ST-REAM
22 7.5 SEvE i T W
T1C OSS LAKE L)1 5’ ’1
LK Sr1OPE D 0.5 M l OF JUDSON SCr- O0L
11EPALES 0400100’.
0000 FE .T DEPTrI CLASS 00
00a30
00625
00610
00671
DATE
TIME
DEPTI
M02 NO3
TOT KJEL
Nt-(3—N
Pi-sOS—DIS
FPOM
OF
N—TOTAL
N
TOTAL
ORTHO
TO
DAY
FEET
MG/L
MG/L
MG/L
MG/L P
MG/L p)
7 ./06/06
09 C
C.044
2.200
.145
0.110
0.360
0.810
74/06/09
11 10
0,192
2.700
0.130
0.105
74/07/05
12 05
0.008
1.200
0.035
0.020
0.140
74/08/12
11 ?S
0.004
1.300
0.025
0.145
74/10/07
10 37
0.056
1.200
3.?30
0.120
74/11 107
11 15
.02 ’
1.000
0.030
0.105
0.210
0.550
74/12/07
10 30
3.352
1.500
0.255
0.375
75/01/07
10 45
0.144
0.900
0.080
0.115
0.2 0
0.140
75/02/05
11 45
0.040
1.100
0.088
0.048
0.070
75/02/26
0.008
0.800
0.032
0.016
75/03/23
09 50
0.064
0.900
0.188
0.144
0.320
75/04/05
09 50
0.070
1.300
0.345
0.115
0.630
75/05/03
09 30
0.440
3.000
0.520
0.370
-------
STORET RETRIEVAL DATE 77/04/11
00001004
CLASS 00
/ AM B ’1 T/ SIRE A
P001460
7.5 wASKOM
2210AA PR221OAA
32 33 00.0 094 00 00.0 4
WASKOM
22
1/C A DDO
CROSS BAYOU
L1EPALES
0000 FEET DEPTH
101691
00630
00625
00610
00671
00665
50051
50053
DATE
TIME
DEPTH
N02 .NO3
TOT KJEL
NH3—N
PHOS—DIS
PHOS—TOT
FLOw
CONL)UIT
FROM
OF
N-TOTAL
N
TOTAL
ORTHO
RATE
FLOw—MGD
TO
DAY
FEET
NG/L
MG/L
MG/L
MG/L P
MG/L P
INST MGD
MONTHLY
74/09/23
09 is
0.120
29.000
15.700
6.500
9.300
0.200
0.250
74/10/23
09 00
0.160
40.000
21.000
9.100
0.165
0.150
74/12/10
09 00
0.560
17.000
3.600
2.400
4.600
0.154
0.150
74/12/26
09 00
0.080
19.000
7.100
4.000
5.000
0.050
0.050
75/01/30
08 15
0.320
17.000
3.950
2.800
3.300
0.175
0.175
75/02/26
08 00
0.675
8.500
1.950
2.600
0.198
0.19 3
75/03/27
14 00
0.320
20.000
4.640
3.880
6.900
0.172
0.172
75/04/29
08 00
0.050
15.500
6.300
4.200
5.400
0.175
0.175
75/05/30
08 00
0.300
7.500
1.300
1.150
2.100
0.150
0.150
75/06/30
1’. 00
0.379
29.000
15.800
8.300
14.000
0.250
0.200
75/Q7/31
08 30
0.025
34.000
19.000
7.750
8.900
0.250
0.220
75/08/29
08 00
0.025
31.000
20.000
9.300
10.500
0.200
0.200
-------
APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1974
STATE OF LOUISIANA
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE MEDIAN MEDIAN 500— MEAN 15— MEDIAN
CODE LAKE NAME TOTAL P INORG N MEAN SEC CPILONA MIN DO DISS ORTHO P
2201 ANACOCO LAKE 0.031 0.080 455.833 8.700 10.400 0.007
2202 BRUIN LAKE 0.057 0.250 450.333 16.350 15.000 0.012
2203 LAKE BISTINEAU o.o61 0.100 458.000 12.933 13.200 0.018
2204 BLACK BAYOU 0.046 0.090 453.417 17.818 12.200 0.009
2205 BUNDICK LAKE 0.157 0.135 469.667 20.467 10.600 0.073
2207 COCODRIE LAKE 0.090 0.400 479.000 35.300 7.700 0.026
2208 COTILE LAKE 0.037 0.100 442.333 12.650 14.000 0.011
2209 CONCORDIA LAKE 0.076 0.080 468.333 32.950 14.800 0.009
2210 CROSS LAKE 0.057 0.080 475.250 38.385 11.400 0.010
2211 D’ARBONNE LAKE 0.038 0.100 458.250 6.800 13.200 0.011
2212 FALSE RIVER LAKE 0.082 0.130 442.500 24.550 14.900 0.023
2213 INDIAN CREEK 0.031 0.150 458.333 21.467 14.800 0.010
2214 SALINt LAKE 0.111 0.350 493.000 15.333 9.600 0.025
2215 TURKEY CREEK LAKE 0.176 0.170 477.833 21.967 14.600 0.033
2216 LAKE VERRET 0.163 0.100 481.428 62.028 12.000 0.056
2217 LAKE VERNON 0.018 0.120 436.667 4.900 14.400 0.007
2219 BLACK LAKE 0.077 0.150 454.000 12.733 11.600 0.015
2220 COCODRIE 0.106 0.050 478.333 33.433 11.800 0.014
4807 CA000 LAKE 0.049 0.070 463.562 20.125 10.000 0.008
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE MEDIAN MEDIAN 500— MEAN 15— MEDIAN
CODE LAKE NAME TOTAL P INORG N MEAN SEC CHLORA MIN DO DISS ORTHO P
2201 ANACOCO LAKE 92 C 16) 83 C 14) 67 ( 12) 89 C 16) 83 C 15) 94 ( 17)
2202 BRUIN LA’cE 61 ( 11) 11 C 2) 83 C 15) 61 ( 11) 0 C 0) 50 C
2203 LAKE BISTINEAU 50 C 9) 58 C 9) 61 ( 11) 72 C 13) 42 ( 7) 33 C 6)
2204 BLACK BAYOU 72 ( 13) 72 C 13) 78 ( 14) 56 C 10) 50 C 9) 81 C 14)
2205 BUNDICK LAKE 11 C 2) 33 C 6) 33 ( 6) 44 C 8) 78 C 14) 0 C 0)
2207 COCODRIE LAKE 28 C 5) 0 C 0) 11 C 2) 11 C 2) 100 C 18) 17 C 3)
2208 COTILE LAKE 83 C 15) 58 C 9) 94 C 17) 83 C 15) 33 C 6) 1 C 11)
2209 CONCOROXA LAKE 44 C 8) 83 ( 14) 39 ( 7) 22 C 4) 14 C 2) 81 C 14)
2210 CROSS LAKE 56 C 10) 83 C 14) 28 C 5) 6 C 1) 72 C 13) 69 C 12)
2211 D’ARBONNE LAKE 78 C 14) 58 ( 9) 56 C 10) 94 ( 17) 42 1 7) 56 C 10)
2212 FALSE RIVER LAKE 3 ( 6) 39 ( 7) 89 16) 28 C 5) 6 ( 1) 28 C 5)
2213 INDIAN CREEK 92 C 16) 28 C 5) 50 C 9) 39 C 1) 14 ( 2) 69 C 12)
2214 SALINE LAKE 17 ( 3) 6 C 1) 0 C 0) 67 C 12) 94 C 17) 22 C 4)
2215 TURKEY CREEK LAKE 0 ( 0) 17 ( 3) 22 C 4) 33 C 6) 22 C 4) 11 C 2)
2216 LAKE VERRET 6 C 1) 58 1 9) 6 C 1) 0 1 0) 56 10) 6 C 1)
2217 LAKE VERNON 100 C 18) 44 C 8) 100 C 18) 100 C 18) 28 1 5) 100 C 18)
2219 BLACK LAKE 3Q C 7) 22 C 4) 72 1 13) 78 C 14) 67 C 12) 39 C 7)
2220 COCODRIE 22 ( 4) 100 C 18) 17 C 3) 17 C 3) 61 C 11) 44 C 8)
4807 CADDO LAKE
67 I 12) 94 C 17) 44 1 8) 50 1 9) 89 ( 16) 89 ( 16)
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