U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
CADDO LAKE
CADDO PARISH, LOUISIANA
MARION AND HARRISON COUNTIES, TEXAS
EPA REGION VI
.
WORKING PAPER No, 637
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
699-440
-------
REPORT
ON
CADDOLAKE
CADDO PARISH, LOUISIANA
MARION AND HARRISON COUNTIES, TEXAS
EPA REGION VI
WORKING PAPER No, 637
WlTH THE COOPERATION OF THE
LOUISIANA WILD LIFE AND FISHERIES COMMISSION
AND THE
LOUISIANA NATIONAL GUARD
MARCH, 1977
-------
REPORT ON CADDO LAKE
CADDO PARISH, LOUISIANA
MARION AND HARRISON COUNTIES, TEXAS
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. 637
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
March 1977
-------
CONTENTS
Page
Foreword i i
List of Louisiana Study Lakes iv
Lake Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 6
IV. Nutrient Loadings 14
V. Literature Reviewed 20
VI. Appendices 21
-------
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 [§303(e)], water qualitv criteria/standards review
[§303(c)L clean lakes [§314(a,bj], and water quality monitoring
[§106 and §305(b)] activities mandated by the Federal Water
Pollution Control Act Amendments of 1972.
-------
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 and
to the Texas Water Quality Board for professional involvement,
to the Louisiana and Texas National Guards for conducting the
tributary sampling phase of the Survey, and to those Louisiana
and Texas wastewater treatment plant operators who provided
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; and Hugh C. Yantis, Jr., Executive
Director of the Texas Water Quality Board; John B. Latchford, Jr.,
Director; and the staff of the Texas Water Quality Board Field
Operations Division reviewed the peril mi nary 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 Guardsmen;
and Major General Thomas Bishop, the Adjutant General of Texas, and
Project Officer William L. Seals, who directed the volunteer efforts
of the Texas National Guardsmen are also gratefully acknowledged for
their assistance to the Survey.
-------
IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF LOUISIANA
LAKE NAME
Anacoco Lake
Lake Bistineau
Black Bayou
Black Lake
Bruin Lake
Bundick Lake
Caddo Lake
Cocodrie Lake
Cocodrie Lake (Lower)
Concordia Lake
Cotile Lake
Cross Lake
D'Arbonne Lake
False River Lake
Indian Creek Reservoir
Saline Lake
Turkey Creek Lake
Lake Vernon
Lake Verret
PARISH
Vernon
Bienville, Webster
Caddo
Natchitoches and Red River
Tensas
Beauregard
Caddo (Menon and Harrison
in Texas)
Concordia
Rapides
Concordia
Rapides
Caddo
Union
Pointe Coupee
Rapides
LaSalle
Franklin
Vernon
Assumption
-------
CADDO LAKE
g -*•:.-'.'.. 'a-:'.": 3::e
X -2
-------
REPORT ON CADDO LAKE, LOUISIANA
STORE! NO. 4807
I. CONCLUSIONS
A. Trophic Condition:*
Survey data indicate that Caddo 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 impact upon designated
beneficial water uses of each lake.
Secchi disc visibility in this humic lake was poor and
potential for primary production, as measured by algal assay
control yield, was moderate to high. Chlorophyll a_ levels
ranged from 2.4 yg/1 to 95.0 ug/1, with a mean of 21.3 yg/1.
Of the 19 Louisiana lakes sampled in 1974, 12 had higher
total phosphorus levels, 17 had higher inorganic nitrogen,
and 14 had higher orthophosphorus values than Caddo Lake.
Survey limnologists reported emergent vegetation along
80% of the shoreline and an oily surface scum on the lake during
all sampling occasions.
B. Rate-Limiting Nutrient:
Algal assay results for the spring sampling season
suggested near col imitation in Caddo Lake by phosphorus and
nitrogen. In the autumn assay, growth increases accompanied
*See Appendix E.
-------
the addition of phosphorus to the Stations 01 to 03 sample,
but in the Stations 04 to 06 sample, growth response was
achieved with the addition of nitrogen. Mean inorganic nitro-
gen to orthophosphorus (N/P) ratios in the lake were 7/1 and
less than 6/1, respectively, during March and November, sug-
gesting nitrogen limitation and 14/1 during May, suggesting
near-col imitation by the two.
C. Nutrient Controllability:
1. Point sources -
During the sampling year, the mean annual phosphorus
load from point sources was estimated to be approximately
3.5% of the total load reaching Caddo Lake. The city of
Jefferson contributed 3.0% of that load.
2
The phosphorus loading of 0.73 g P/m /yr for Caddo
Lake is less than the "eutrophic" load proposed by Vollen-
weider (1975) for lakes with such volume and detention
time. However, loading calculations yield an apparent net
export of phosphorus and nitrogen from the lake. This could
be due to an underestimation of nutrient loadings from the
six ungaged tributaries entering Caddo Lake (see Section
IV-E) or to the lack of nutrient load estimations for the
Longhorn Ordnance Plant or other undetected and unmeasured
point sources. 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.
-------
2. Nonpoint sources -
The phosphorus load from nonpoint sources was 96.5% of
the total reaching the lake during the sampling year. Cypress
Bayou contributed 74.7%, Monterey Lake Outlet contributed 10.5%,
and the ungaged tributaries and immediate drainage were esti-
mated to have contributed 5.0% of the nonpoint source phosphorus
load.
In general, few lakes are nitrogen limited as a result of
low nitrogen. Rather, excessive phosphorus levels shift limi-
tations to nitrogen or other factors. Regardless of the primary
nutrient limitation suggested by either algal assay or nutrient
ratios, the most feasible approach to nutrient control, if desir-
able, is through available phosphorus control technology and
subsequent establishment of phosphorus limitation within the
water body.
-------
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are itemized below.
Lake surface area and mean depth was provided by the State of
Louisiana, maximum depth was estimated on the basis of Survey data;
tributary flow data were provided by the Louisiana and Texas District
Offices 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.
Precipitation 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: 132.09 km2.
2. Mean depth: 1.8 meters.
3. Maximum depth: 3.0 meters.
4. Volume: 231.896 x 106 m3.
5. Mean hydraulic retention time: 42 days.
-------
B. Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries -
Drainage Mean flow
Name area(km2) (m3/sec)
C-l Harrison Bayou 112.9 0.93
D-l Kitchen Creek 88.8 0.73
J-l Cypress Bayou 5,542.6 46.05
L-l Monterey Lake Outlet 909.1 7.48
Minor tributaries and
immediate drainage - 321.1 3.73
Totals 6,974.5 58.92
2. Outlet - A-l Willow Pass Creek 7,107.0 64.20
(Twelvemile Bayou)
C. Precipitation:
1. Year of sampling: 156.1 cm.
2. Mean annual: 113.7 cm.
-------
III. LAKE WATER QUALITY SUMMARY
Caddo 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 six 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
enumeration. 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 Stations 01, 04, 05,
and 06, and 1.8 meters at Stations 02 and 03. For a more de-
tailed explanation of NES methods, see NES Working Paper No. 175.
The results obtained are presented in full in Appendix C
and are summarized in III-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 III-B. Results
of the limiting nutrient study are presented in III-C.
-------
CAOOO LAKE
STO^ET CODE 4n07
PHYSICAL AND CHEMICAL CHARACTERISTICS
( 5/J1/74 )
( 8/26/74 )
PARAMETER N*
TEMPERATURE IUEG CENTJ
O.-l.S M DEPTn 11
MAX DEPTH00 6
DISSOLVED 0*YGEN (*G<
0.-1.5 M OEKTH
MAX DEPTH**
CONDUCTIVITY (UMHOS)
O.-l.S M DEPTH
MAX DEPTH**
PH (STANDAPO UNITS)
O.-l.S M DEPTH
MAX DEPTH**
TOTAL ALKALINITY (MQ.
O.-l.S M OEPTH
MAX DEPTH**
TOTAL P (MG/L)
O.-l.S M PFPTH
MAX 0 F P T H * *
'L>
5
6
11
6
11
6
/L)
11
6
11
t
DISSOLVED ORTHO P (MG/L)
0_]ClMnFPTH I*
.l.i ^° i ' c. " l n
MAX OEPTH**
NO?*N03 (MG/L)
01 C jui HFi-JTr^
.— !.:> "^ ICrln
MAX OEPTH**
AMMONIA (MG/L)
O.-l.S M PEr'TH
MAY i'^C"DTw<>4>
M fl A '.Itrlrl
KJtL'~'AHL N (MG/L)
01 C M f^fiJTrt
• l.T f" U C. K I n
MAX DEPTH**
1 A
6
11
l
11
1 1
1 1
6
Sooo
PANGE
15. H- 17. S
15.8- 17.4
7.4-
7.2-
91.-
92.-
6.2-
6.2-
10.-
10.-
0.035-0
On 4 H — n
• u o n — \i
On n 7 — n
* U U f — U
0.007-0
Of\ Q f\ f\
• U c U — U
0.020-0
Of. n (i r\
• O U U — U
0.600-0
9.4
9.4
169.
169.
7.4
6.9
21.
19.
.055
no A
. Ux. u
.020
A O A
• U O U
ii b A
* UnO
.060
7 n ft
. f UO
.700
MEDIAN
16.0
16. b
3.8
8.7
106.
107.
6.8
6.7
14.
16.
0.042
On A n
. '1 »+ u
n oil)
U . " 1 U
0.011
On "^ n
» n j u
OA A A
. 'J ** U
0.040
On A u
. \i *t U
OA A n
• o u u
o.6no
(METERS)
0.0- 1.5
1.5- l.H
1.5-
1.5-
0.0-
1.5-
0.0-
1.5-
0.0-
l.h-
0.0-
1.5-
On —
. u
1C
• b —
0.0-
1 c_
I » O""
OA —
• U
1.5-
1.5
1.3
1.5
1.8
1.5
1.8
1.5
1.8
1.5
1 • 0
1 C
I . 3
1.8
1C
. -3
1(i
* O
1.5
1 A
1 . o
1C.
• ^J
1.8
6
6
6
12
6
12
6
12
6
12
i y
i C
6
12
ti
1 3
1 C
6
2a.9-
6.8-
6.8-
139.-
139.-
7.2-
7.3-
10.-
10.-
0.046-0
On c n _ n
. U j \j — \J
On n f\ — f i
• u u o — u
0. 006-0
On ? n — n
. U c 11 — U
0 * 020 — 0
0.030-0
Of i -5 n (\
• U j U — U
Oil ^ i-. n
* b u u u
0.500-0
27.9
27.9
7.6
7.6
222.
222.
8.4
7.9
17.
17.
.060
A (* A
. U D U
A 2 A
• U c U
.012
1 A (I
. 1 *f U
i /. n
• 1 ^ U
.060
n t n
• U D U
.700
MEDIAN
26.9
26. b
7. 1
7.1
187.
186.
7.7
7.5
11.
11.
0.051
On c •,
• U D1*
On A 7
• u u f
0.007
A n "3 n
If * U J U
o . o r-j 5
0.0^0
On A n
. u*^ u
0'7 ft n
. f U U
0.6HO
MAX
DEPTw
RANGE
(METEKS)
0.0- 1.5
0.6- 1.5
0.6-
0.6-
0.0-
0.6-
0.0-
0.6-
0.0-
0.6-
0.0-
Of
. b —
On ••
. u —
0.6-
On
• U —
0 .6-
0.0-
0^
. 6 —
Ori
. 0 —
0.6-
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
It
. b
1C
. b
1.5
1C,
• b
1.5
1.5
It
. b
It
. b
1.5
NO
10
-------
( 11/11/7"
AND CHEMICAL CrtAtfACTtrdSTICb
TEVi-'E-i't [IJ-TI .(otC- <_i.N.T)
0.-l.c •" Ct>Tn 12
MAX OFPTi-«° 6
DISSOLVED OXYGEN I^G/LI
O.-l .5 M DEPTH lie
WAX OfPTn*0 b
CONDUCTIVITY (Ll'-inv)i)
O.-l.T M DEPTH 12
MA* DEPTH*0 f>
PH (STANDARD UNITS)
O.-l.b M DEPTH 12
MAX DEPTH*"" 6
TOTAL ALKALINITY (i'G/L)
O.-l. 5 M '...EPTH 12
MAX. DEPTH-* 6
TOTAL P (MG/L)
O.-l.'i v OE^r-i 12
MAX DEPTH** ti
DISSOLVED ORTHO P
0,-l.S 14 DEPTH if
MAX OEPTH»» b
KJtLl-AnL <"• (M'i/L)
0 . - I . c, N ! i E H- T n 12
MAX np-pTH«-«- 6
16.2-
16.3-
4.d-
4.8-
54.-
58.-
5.3-
5.3-
lil.-
10.-
0.0<»3-0
0.047-0
0.006-0
0.009-0
0.020-0
0.020-0
0.030-0
0.030-0
0.500-0
0.500-0
17.2
17.2
a. 4
6.4
109.
109.
6.4
6.3
16.
16.
.079
.079
.0?0
.019
.030
.030
.330
.330
.900
.900
16.0
16.7
7.3
7.3
94.
84.
S.b
5.5
11.
11.
0.061
0.0 6b
0.01^
O.ni 7
0.020
0.020
0.04b
0.04b
0.601/
0 . ^>0 "
0
1
0
1
0
1
0
1
n
l
0
1
0
1
0
1
ft
1
0
1
.0-
. 5-
.0-
.5-
.0-
.5-
.0-
.5-
.0-
.5-
.0-
.5-
.0-
.b-
.0-
. 5-
.0-
.5-
.0- .
.5-
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
» ^
•^
.5
.5
.b
. 5
.S
.b
.S
.b
.b'
.5
.S
.b
.b
.S
.b
.5
.b
.5
SECCHI DISC (.
0.9- 1.3 1.1
* N = NO. OP S
*«• MAXIMUM UEPTH SAMKLKU AT tACh SITE
• «»» i = MO. Or SlltS SuMkLtO ON IH!«; DATE
-------
B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
03/23/74
05/31/74
06/03/74
Dominant
Genera
1.
2.
3.
4.
5.
Melosira
Chlamydomonas
Flagellates
Raphidiopsis
Nitzschia
Other genera
Total
Other genera
Total
Algal
Units
per ml
4,960
1,114
861
709
607
3.493
11,744
1.
2.
3.
4.
5.
Lyngbya
Melosira
Dactylococcopsis
Nitzschia
Microcystis
15,979
2,527
1,957
1,957
1,141
7.255
30,816
1.
2.
3.
4.
5.
Lyngbya
Melosira
Pennate diatom
Microcystis
Merismopedia
Other genera
18,932
5,177
1,923
1,331
1,035
7,543
Total
35,941
-------
10
2. Chlorophyll a^ -
Sampling Station Chlorophyll
Date Number (yg/1 )
03/23/74 01 4.9
02 8.7
03 5.4
04 10.1
05 10.9
06 11.0
05/31/74 01 28.1
02 28.1
03 28.1
04 95.0
05 16.9
06 25.3
08/26/74 01 15.8
02 20.5
03 11.3
04 25.0
05 27.6
06 22.4
11/11/74 01 2.4
02 2.5
03 7.1
04 11.9
05 6.0
06 8.0
-------
11
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
a. 03/23/74 - Stations 01-05
Inorganic N
Cone.(mg/1)
0.069
0.069
1.069
1.069
b. 11/11/74 - Stations 01-03
Ortho P
Spike (mg/1) Cone. (mg/1)
Control
0.05 P
0.05 P + 1.0 N
1.00 N
0.017
0.067
0.067
0.017
Ortho P Inorganic N
Cone.(mg/1) Cone!(mg/1)
Spike(mg/1)
Control 0.010
0.05 P 0.060
0.05 P + 1.0 N 0.060
1.00 N 0.010
c. 11/11/74 - Stations 04-06
M*
M
M
M
Spike(mg/l)
Control
0.05 P
0.05 P + 1.0 N
1.00 N
Ortho P
Cone.(mg/1)
0.016
0.066
0.066
0.016
Inorganic N
Cone.(mg/1)
0.087
0.087
1.087
1.087
Maximum Yield
(mg/l-dry wt.)
1.0
1.8
16.6
1.4
Maximum Yield
(mg/1-dry wt.)
0.6
2.3
14.2
0.5
Maximum Yield
(mg/1-dry wt.)
2.2
2.4
17.0
3.6
''Missing.
-------
12
2. Discussion -
The control yields of the assay alga, Selenastrum
capricornutum, indicate that the potentials for primary
production were moderate to high in Caddo Lake at the times
of sampling. In the spring assay, spikes with either phos-
phorus or nitrogen alone produced slight increases in assay
yield, suggesting near colimitation by the two nutrients.
Maximum yield was achieved with the simultaneous addition
of both nutrients.
In the autumn assay, the control yield of the assay for
Stations 01 to 03 was much lower than that for Stations 04
to 06. This is possibly attributable to the proximity of
Stations 04 to 06 to the Mooringsport sewage treatment plant
outfall. The assay for Stations 01 to 03 showed a growth
response to the addition of phosphorus, suggesting phosphorus
limitation, while the Stations 04 to 06 assay showed response
to the addition of nitrogen. Again, simultaneous additions
of both phosphorus and nitrogen resulted in maximum assay
yields.
The mean N/P ratios in the lake data were 7/1 and less
than 6/1 for March and November suggesting nitrogen limita-
tion. The N/P ratio of 14/1 during May sampling suggests
borderline phosphorus limitation (an N/P ratio of 14/1 or
greater generally reflects phosphorus limitation).
-------
13
It should be noted that significant chemical changes
took place in Louisiana lake samples between collection and
assay analysis. 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 control yield as
well as modifying the N/P ratio.
-------
14
IV. NUTRIENT LOADINGS
(See Appendix D for data)
For the determination of nutrient loadings, the Louisiana
and Texas National Guards collected monthly near-surface grab
samples from each of the tributary sites indicated on the map
(page v), except for the high runoff month of February when
two samples were collected. Sampling was begun in June 1974,
and was completed in April 1975.
Through an interagency agreement, stream flow estimates
for the year of sampling and a "normalized" or average year were
provided by the Louisiana and Texas District Offices of the USGS
for the tributary 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 tribu-
taries are those measured minus known point source loads, if any.
Nutrient loadings for unsampled "minor tributaries and imme-
diate drainage" ("ZZ" of USGS) were estimated by using the mean
annual nutrient loads, in kg/km^/yr, in Harrison Bayou, Kitchen
Creek, and Monterey Lake outlet at Stations C-l, D-l, and L-l,
and multiplying the means by the ZZ area in km^.
The operators of the Jefferson and Mooringsport wastewater
treatment plants provided monthly effluent samples and corres-
ponding flow data.
-------
15
A. Waste Sources:
1. Known municipal -
Name
Jefferson
Mooringsport
Population Mean Flow Receiving
Served* Treatment* (m3/d x IP3) Water
2,866
850
2. Known industrial -
Name Product
Longhorn
Ordnance Plant
Ammunition
Stabilization 2.116
pond
Trickling
filter
Treatment
Trickling
fi1ter
0.246
Black Cypress
Bayou
Caddo Lake
Mean Flow Receiving
(m3/d x IP3) Hater
Unknown
Caddo Lake
*Sewage treatment plant questionnaires.
-------
16
Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
C-l Harrison Bayou 2,655 2.7
D-l Kitchen Creek 860 0.9
J-l Cypress Bayou 72,560 74.7
L-l Monterey Lake Outlet 10,200 10.5
b. Minor tributaries and immediate
drainage (nonpoint load) - 4,815 5.0
c. Known municipal STP's -
Jefferson 2,930 3.0
Mooringsport 485 0.5
d. Septic tanks* - 260 0.3
e. Known industrial -
Longhorn Ordnance Plant Unknown —
f. Direct precipitation** - 2.310 2.4
Totals 97,075 100.0
2. Output -
A-l Willow Pass Creek 103,390
(Twelvemile Bayou)
3. Net annual P export*** - 6,315
*Estimate based on 58 lakeside residences, 1 state park, and 130 camps.
**Estimated (see NES Working Paper No. 175).
***Export probably due to unknown sources and/or sampling error.
-------
17
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
% of
Source kg N/yr total
a. Tributaries (nonpoint load) -
C-l Harrison Bayou 21,710 1.5
D-l Kitchen Creek 14,310 1.0
J-l Cypress Bayou 1,052,130 72.6
L-l Monterey Lake Outlet 147,470 10.2
b. Minor tributaries and immediate
drainage (nonpoint load) - 55,230 3.8
c. Known municipal STP's -
Jefferson 4,880 0.3
Mooringsport 1,500 0.1
d. Septic tanks* - 9,795 0.7
e. Known industrial -
Longhorn Ordnance Plant Unknown —
f. Direct precipitation** - 142,605 9.8
Totals 1,449,630 100.0
2. Outputs -
A-l Willow Pass Creek 1,775,590
(Twelvemile Bayou)
3. Net annual N export*** - 325,960
*Estimate based on 58 lakeside residences, 1 state park, and
130 camps.
**Estimated (see NES Working Paper No. 175).
***Export probably due to unknown sources and/or sampling error.
-------
18
D. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km^/yr
Harrison Bayou
Kitchen Creek
Cypress Bayou
Monterey Lake Outlet
24
10
13
11
Mean Nutrient Concentration in Ungaged Streams:
Tributary
Mean Total P
(mg/1)
B-l Tete Bayou
E-l Mill Creek
F-l James Bayou
G-l Hunts Creek
H-l Tiger Branch
K-l Saunders Branch
0.086
0.038
0.044
0.046
0.056
0.062
192
161
190
162
Mean Total
(mg/1)
0.943
0.598
0.657
1.050
0.985
0.637
Nutrient levels for the above ungaged tributaries are all
comparable to those levels in the measured tributaries entering
Caddo Lake.
-------
19
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
Phosphorus Loading
(q/m2/yr)
Estimated loading for Caddo Lake 0.73
Vollenweider's "eutrophic" loading 0.74
Vollenweider's "oligotrophic" loading 0.37
-------
20
V. LITERATURE REVIEWED
Ketelle, Martha J. and Paul D. Uttormark. 1971. Problem Lakes
in the United States. U.S. Environmental Protection Agency
Project #16010 EHR. University of Wisconsin, Madison, Wisconsin.
Shampine, W. J. 1971. Chemical, Biological, and Physical Data for
the Major Lakes and Reservoirs in Louisiana. Louisiana Dept. of
Public Works, #5. Baton Rouge, Louisiana.
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. Hydrol. 37:53-84.
-------
21
VI. APPENDICES
APPENDIX A
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.621/I = miles
Motors x 3.281 = feet
Cubic motors x 0.107 x 10" - acre/feet.
Square kilometers x 0.38C1 ~ square miles
Cubic motors/sec x 35.315 - cubic feet/sec
Centimeters x 0.3937 :: inches
Kilograms x 2.205 ~- pounds
ms/square kilor.istcr x 5.711 ~ Ibs/square mile
-------
APPENDIX B
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR LOUISIANA
04/11/77
LA
-------
TRIBUTARY FLOW INFORMATION FOR LOUISIANA
04/11/77
LAKE COOE 2206 CAOOO LAKE
MEAN MONTHLY FLO*S AND OAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOw DAY
2206J1
2206L1
FLOW DAY
FLOW DAY
FLOW
6
7
8
9
10
11
12
1
2
3
6
7
8
9
10
11
12
1
2
3
4
74
74
74
74
74
74
74
75
75
75
74
74
74
74
74
74
74
75
75
75
75
184.060
4.474
2.294
79.287
35.113
185.759
135.921
84.951
211. 810
101.657
30.299
0.736
0.368
13.026
6.881
36.529
22.370
9.911
44.457
25.542
11.836
o
6
8
7
7
1
7
6
6
24
8
6
10
7
5
10
6
11
8
7
19
211.810
7.192
1.161
29.733
54.935
62.580
176.697
105.905
654.119 22
131.956
34.547
1.133
0.249
4.729
8.212 18
12.884
26.051
17.103
143.850 22
20.813 22
16.933
72.774
3.851
20.586
26.250
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
IG-'-I
DATE
FDQV
TO
TI.vE OEPT-!
OF
DA/ FEcT
74/03/23 10 10 0000
10 10 OOuS
74/05/31 14 45 OOon
14 45 0002
74/08/26 09 20 0000
09 20 0004
74/11/11 09 50 0001!
09 50 000=3
DATF. TIME DEPTH
FKOM OF
TO DAY FEET
74/03/23 10 10 0000
10 10 000s.
74/05/31 I* 45 0000
14 45 0002
74/18/26 09 20 0000
74/11/11 09 50 0000
09 50 0 0') S
0 d 0 i 0
wAl tP
TtM>
Ct-iT
lh.0
15. ft
27.6
27.6
29.6
29.6
16.2
16.3
00665
HOS-TOT
M(3/L P
0.055
0.054
0.055
0.056
0.056
0.075
0 0300
DO
MG/L
7.4
7.2
3.6
4.d
t .*
32217
CHLKPHYL
A
UG/L
4.4
2.-J.1
IS. 6
2.4
00 u / 7 0009"
TKCMS^ CNDUCTVY
ctCCnI rIELO
li-iC'nr.S MIC^UMhu
42 9*
94
42 13°
139
33 137
138
SO 61
61
00031
INCDT LT
RF.MNlNG
HEKCENT
32 42 04.0 0^4 0* ib.O
CAiJUu LA'E
4* I £ » 4S
1 lt>!
3
0 0 " 0 '.i
•J <-1
St'
h.20
6.2t;
7.40
7.40
7.20
5.34
5.31
•UtS 2111
0009
0 0 » i 0 00610
r ALK NH3-N
CAC03 TOTAL
M.J/L MG/L
1'JK 0.040
1 0 x 0.060
13 0.0*0
17 0.060
10 0.040
10 0.060
1202
Fftf OE^
U0623
TOT ^jtL
N
MG/L
0.600
0.600
0.700
O.SOO
O.bOO
0.600
T-
00630
NO?f.N03
N-TOTAL
MG/L
0.070
0.080
0.050
o.uo
0.020K
0.020
00671
PHOS-DIS
OWTHO
MG/L C
0.016
0.020
0.020
0.012
0.013
0.017
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
STO^-ET SETrtlEVAL
NATl.
fr./ul/ln
<• o0 7'jc
5 c •• 1 U 1 . 0 0 -T 4 03 0 D . n
i 1 tf^LtS
j
DaTE
F -> Q i.'
TO
74/03/23
74/06/03
74/08/26
74/H/ll
TI-.
OF
>E
DAY
10
10
11
11
09
09
10
10
35
35
00
00
40
40
10
10
OEt-l«
FEE!
000 "i
0005
0 0 0 ;i
000-3
oooo
0006
0000
ooos
! I. J I
* a i E -
TC.MI-
ct^\
16
16
26
26
29
29
16
Ib
i'
.6
.5
.b
.3
.2
.2
. _•*
.<*
1)030(1 ou;. ff ufi'j-<.
00 Tr^i-JbP C.-tOuCTvr
5 i C C « I F I F L 0
M'J/L I'«C-tS ^lC40f"-iu
48 91
9.4 9^
30 190
?.o lab
3.6 30 134
3.6 134
7.0 3d 6 u
7.2 SH
•j •') -
*"n
su
6
6
H
7
7
7
C,
5
Ou
.70
.70
.45
.90
.20
.20
.4b
."5
U U <. 1 'J
CAC03
«G/L
U009
DE-1
00»>10
Nrij-N TOT KJEL
TOTAL N
10K
!•*
11
11
0.040
0.040
0.040
0.030
0.060
0.050
0.700
0. fOO
O.rtOO
0. ^00
0. /OO
O.SOO
00630
N02J.N03
N-TQTflL
MG/L
0.030
0.040
0.020
0.020K
0.020
0.030
00*71
OKTiO
MG/L P
0.013
0.016
0.007
0.009
0.016
0.019
32217 00031
DATE TIME DEPTH pr,o?-rOT CHLRPHYL INCDT LT
TO DAY FEET cui/L P UG/L PEHCENr
74/03/23 10 3S 0000 O.OS1 a.7
10 35 OOO'i 0.050
74/06/03 11 00 0000 0.049 28.1
11 00 0001 SO.O
11 00 0004 i.o
11 01 000* U.0b2
74/OH/26 09 40 0000 20.5
74/11/11 10 10 0000 o.06r 2.5
10 10 000^ O.Oo?
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
STO'-iT
NATL F.
E P A - L A S
<• o 0 7 0 3
3? 41 38.0 0v4 01 4 b. 0
DATE
F-'0«
TO
74/03/23
74/05/31
74/08/26
74/H/ll
TI>,
OF
QAV
10
10
14
14
09
09
09
09
E C
>EPT--i
•'i ij U 1 l)
*' 4 T 1 4
TtMP
FEtT Cc.^T
45
45
30
30
55
55
30
30
000"
OOu*
001)0
0003
0000
0005
Ouor.
000^
17.5
17.4
27. >4
27.9
3U.4
30.4
16.d
16. b
0 0300
00
MG/L
7.2
6.6
6.0
5.4
5.2
5.*
00077
FIELD
IiNCntS
3b
36
16V
169
222
222
261
261
96
99
llt'r-ALES
3
0 0 4 o u 0 0 <* 1 0
2111202 '
0010 KEtT UEt'TM
OOblO 00^2^^ 00630
P>H 1 iLK Nrl3-N TOf KJEL
SIJ
6.40
6.25
7.20
7.40
7.10
7.10
5.43
S.35
CAC03
Mb/L.
21
!•*
10K
10^
10K
1QK
TOTAL
MG/L
0.060
0.050
0.060
0.050
o.oso
0.330
N
MG/L
0. ^00
o. too
0.900
0.700
O.rtOO
0.900
N02&N03
N-TOTAL
MG/L
0.050
0.050
0.060
0.050
0.020K
0.020
00671
PHOS-OIS
0«T«0
MG/L p
0.016
0.013
0.010
0.012
0.012
0.015
DATE
FOOM
TO
74/03/23
74/05/31
74/08/26
74/11/11
TIME DEPTH
OF
i)AY FEET
10 45 0000
10 45 0006
14 30 0000
14 30 0003
09 55 0000
09 30 0000
09 30 OOOS
006^5
PHOS-TOT
MG/L P
0.035
0.039
0.051
0.0*0
u.O^e
(i.C7v
32217
CHLRHHYL
A
UG/L
b.4
3M.1
11.3
7.1
00031
INCOT LT
^Fl-iNlNG
PERCENT
K VALUE KNOWN TO BE LESS TKAM
INDICATED
-------
STOPdT Pc.T = i:. v
t' t h / 0 1 / 1%
<»6070<*
3c tj £3.0 O'jJ Sr 19.
CADOO
DATE Tl-'t
FROM Of1
TO OAT FEET
74/03/23 10 55 0000
10 55 0005
74/06/03 11 15 OOOn
11 15 0004
74/08/26 10 10 0000
74/11/11 10 30 0000
10 30 OOU5
D'.OIO
MtE*
TE.IP
CtNT
17.0
16.9
26.3
25.9
28.8
17.2
17.2
00300
DO
MG/L
9.*
7.2
7.0
8.4
8.4
i.i >077
T i 4 N' b> v
StCChI
INCntS
4B
29
24
50
oofl--
C.>jDUCTvY
FIELD
MICwOMhG
10«
109
17<*
iai
130
109
109
3
0 0 <» 0 0
f*f
:•>"
7.40
^.80
6.2U
7.55
7.20
6.43
n.34
00<*10
T ALK
CACOJ
MG/L
\*
\*
10
10
Ifo
lu
0009
00610
NnJ-N
TUTAL
MG/L
0.020
0.020
0.040
0.040
0.030
0.030
FEtT uEPTH
00^ ^5
TOT K.jtL
N
MG/L
0.600
O.*500
0. 700
0.600
0.800
0.600
00630
N02&N03
N-TOTAL
MG/L
0.030
0.020
0.030
0.040
0.020K
0.020
00671
PHOS-OIS
OPTrtO
MG/L P
0.008
0.007
0.006
0.006
0.008
0.009
00665
DATE TIME DEPTH PHOS-TOT
FROM OF
TO OAV FEET MG/L P
74/03/23
74/06/03
74/OB/26
74/11/11
10
10
11
11
11
11
1"
10
10
55
55
15
15
15
15
10
30
30
0000
0005
0000
0 0 0 1
0004
0005
0000
oooo
0005
0
0
0
0
0
0
.045
.039
.051
.050
.043
.047
10.
95.
25.
11.
1
0
0
9
32217 U0031
CHLRPHYL INC01 LT
A RE.-1NI.NG
UG/L PERCENT
so.o
1.0
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
STO-tT RETrUtVAL IJATE
NATL ElJTHOPr-ICATIl>i S
EPA-LAS
7 <-./<) 1/1-j
480705
3d <*1 40. u
CAODO LA / 43.0
DATE
FPO'-'
TO
74/03/23
74/06/03
74/03/26
74/11/11
DATE
FHQ'i
TO
74/03/23
74/06/03
74/08/26
74/11/11
TI'-'E OEPT*-
OF
DAY FEET
11 15 0000
11 15 OOOS
11 30 0000
11 30 0005
10 25 0000
10 25 0005
10 50 0000
10 SO 0005
TIME DEPTH
Of
DAY FEET
11 IS 0000
11 15 OOOS
11 30 0000
11 30 0001
11 30 0004
11 30 OOO^i
10 25 0000
10 50 0000
10 50 0005
0 0 0 1 0
«ATtP
Tf-lf-
Ct. :JT
16.9
16.6
27.2
26.4
29.4
24.4
16.7
16. a
00665
HHOS-TOT
MG/L K
0.038
0.038
0.046
0.051
0.057
0.0*8
0 0 300
00
MG/L
H.6
7.0
6.0
5.4
7.6
7.4
32217
CHLRHHYL
4
UG/L
10.9
16.9
27.6
6.0
u (i o 7 ;
T H A N S °
^ECCnl
iNOtS
42
4b
22
37
00031
INCOT LT
^FMNlNG
PEKCtlNT
50.0
1.0
0 0044
CMDUCTVr
FIELD
MIOOK^G
106
108
18b
186
12t>
132
71
vo
0(1400
Si!
6.^0
7.85
7.JS
7.20
7.10
5.71
b.tol
tS
0 0 <* 1 U
T AI_^
CAC03
MG/L
U
11
11
10K
16
211!
ooov
00610
TOTAL
MG/L
0.020
0.04U
0.040
0.040
0.060
0.030
12i)
-------
OATt 76/01/16
EPA-LAS VEGAS
•*8t'706
32 42 20.0 095 55 14.0
CAtfuO LAKE
DATE
FPO*
Tn
74/03/23
74/06/03
74/08/26
74/11/11
DATE
FROM
TO
74/03/23
74/06/03
74/08/26
74/11/11
TIME
OF
DAY
11
11
11
11
10
10
11
11
25
25
40
40
40
40
on
on
TIME
OF
DAY
11
11
11
11
11
10
11
11
25
25
40
40
40
40
00
on
DEPTn
FEET
0000
000^
ooon
0005
0000
0005
ooon
OOO1-.
DEPTH
FEET
ooon
0005
0000
0001
0005
0000
0000
OOOS
n o o 1 0
WATE*
TE.MP
CENT
16.9
16.8
27.5
26.7
28.9
29.9
17.0
16.9
00665
PHOS-TOT
Mu/L P
0.035
0.042
0.051
0.056
0.056
0.069
11EHALES 2111202
J 000V FEET uE
00300 IMI0/7 0009*. 00400 00410 00610 00623
DO TRANSP CNDUC1VT Ph T ALr* NM3-N TOT KJEL
SECCHI FIELD CACOS TOTAL N
MG/L INCHES MICHOMHO so MG/L MO/L MG/L
8.
7.
6.
5.
8.
H.
32217
37 ID* 7.20
8 105 6.90
24 201 7.30
0 199 7.80
0 20 134 7.10
0 134 7.10
2 46 97 6.09
0 97 S.88
00031
10 0.040 0.600
10 0.040 0.600
11 0.050 0.800
10 0.030 0.700
15 0.030 0.700
12 0.040 0.600
CHLRPHYL INCOT LT
A
UG/L
11.
25.
22.
H.
REMNlNfi
PEKCENT
0
3
50.0
1.0
4
0
00630 00671
N02J.N03 PHOS-OIS
N-TOTAL OHT40
MG/L MG/L P
0.030
0.030
0.020
0.020
0.020K
0.020
O.OOfi
0.003
0.007
0.006
0.011
0.017
K. VALUE KNOWN TO BE LESS THAN
INDICATED
-------
APPENDIX D
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STCRST SET&IE^Al CATc 75/11/28
NATL EUTROPI-ICiTIGN
ERA- LAS VfGiS
HATE
FRO*
TO
74/06/09
74/07/C6
74/08/06
74/09/07
74/IC/C5
74/11/01
74/12/07
75/01/06
75/02/06
75/02/24
75/03/24
TTPE f
CF
CAY f
09 20
12 45
13 37
12 00
CS 50
15 10
CE 1C
CS 30
09 45
C£ 45
09 20
F6F.T
2206AI
32 42 2C.O OS3 55 00. C
hlLLCn PASS C-,ri*
22 15 ViC'JKiNGSPC'U
G/CiOCC LiKs
CiCOO LiK- SP!LL«AV .25 f: A3CVS BLACK B
211120*
CCOO FthT DcPTH
C0630
NC26NC3
N-TCTAL
MG/L
0.012
0.012
0.012
O.J23
0.032
0.024
0.008
0.016
0.024
0.016
0.016
CC625
T'JT KJtL
N
fG/L
0.700
1.200
C.800
0.750
1.100
C.8CO
0.600
C.400
C.500
0.650
2.000
CC61C
NH2-N
TCTAL
f-G/L
C.020
0.025
0.015
0.02C
C.035
C.C4C
0.015
0.016
C.C24
0.024
C.040
00671
FHGS-Di S
ORTl-G
NG/L P
0.01C
0.015
O.OC5
C.C05
0.0 1'C
C.C1C
C.015
C.01C
C.03C
0.016
0.016
00665
FHCS-TGT
fC/L F
C.C55
0.110
0.075
C.C40
0.030
C.040
C.050
C.030
C.C40
0.060
0.040
-------
STO&F.T PSTRI6VAL DATE 75/li/2f
NATL EUTFCFHCATICN SURV-Y
EPA- LAS VtGAS
220631
32 40 40.0 094 01 40.C
TtTr EAYfA
22 7.5 POTTERS PT
T/CACCC
? N't SV. SI HW 169 JCT
2111204
0000 CECT DEPTH
DATE
F'Ulf ("F
TO DAY
00630
HEPTH NC2GN23
N -TOTAL
FSfiT MG/L
00625
TCT KJEL
N
NG/L
CC610
TCTAL
MC-/L
OC671
PHOS-CIS
CRTHC
MC/L F
CC665
FhCS-TCT
HG/L P
74/06/08
74/07/06
74/08/08
74/09/07
74/10/07
74/11/01
74/12/07
75/01/06
75/02/06
75/02/24
75/03/24
12 20
12 15
12 53
12 30
10 50
14 5C
09 41
1C CC
OS 15
C9 00
C? 5C
0.036
0.012
0.013
0.068
0.324
0. C20
O.C24
0.016
0.016
0.016
0.024
C.800
C.800
1.100
1.100
0.900
1.300
C.700
0.900
C.400
0.400
1.700
0.040
0.015
0.040
C.165
0.050
C.165
C.020
0.032
0.032
0.024
0.032
0.025
O.C25
0.045
C.035
0.030
0.020
C.C15
0.015
0.032
C.Olt
0.024
0.095
C.090
0.160
0.115
C.130
0.130
C.C60
C.040
0.040
C.C40
0.050
-------
STDRFT RETFIEVAL DATE 75/11/2S
N4TL EUTSOPHCAT10N S(j*Vi'Y
EPA- LAS VEGAS
220fcCi
II 39 45.C 0<54 07 25. C
hA^ISCi 5AYGU
22 7.5 .F.CTTCRS FT
T/CADCO LAKE
2N03Y ?C 3SCG 1.25 Mi W ST H'«Y 2457 JCT
ii^PALtS 2H1204
•V CCOC FccT OcPTH
OATE
PROP
TO
74/06/08
74/07/06
74/08/08
7W09/C7
74/10/07
74/11/01
74/12/C7
75/01/06
75/02/Ofc
75/02/24
75/03/24
75/04/C5
TTHt r.tPTl
TF
CAY FfEET
11
10
1C
11
12
12
11
11
11
11
1C
02
55
15
45
30
44
35
CC
CC
45
35
00650 CC625
- NC2&NC3 TCT KJ?L
N-TGTAL N
MG/L
0.
C.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
044
140
116
084
032
032
OCS
048
016
016
024
010
KG/L
0.
C.
0.
0.
C.
C.
1.
C.
0.
C.
1.
1.
500
500
300
300
400
SCO
200
400
300
600
000
300
CC61C 00671 00665
M-2-N PHCS-CIS PI-CS-T-T
TCT4L CFTH:
fG/L
0
0
0
0
C
C
C
C
0
0
C
0
.035
.025
.015
.045
.030
.C25
.020
.C24
.024
.032
.032
.020
MG/L F
0.035
C.050
0.065
C.09C
0.055
0.065
0.04C
0.015
0.032
O.C24
C.C24
0.015
NG/L P
0
0
C
0
0
C
0
C
C
0
C
0
.095
.120
.100
.140
.090
.210
.110
.C40
.C50
.060
.060
.020
-------
l PtTMfcVAL CATC 75/11/22
N4TL FUTRQPHCATION SIRVeY
£04- LAS VtGAS
2206C1
22 46 45.C C?4 05 22.C
K IT C H : Cs C S c ? K
22 7.5 SMITH. AM:
T/C4DCC LAKE
2NL3Y Rf EhCG 2.25 Mi S ST HWY 49 JCT
S 2111204
OCOC FS:T C^PTH
DATT
FRJ^
rn
74/06/09
74/07/Ot
74/08/08
74/09/07
74/10/07
74/11/01
74/12/C7
75/01/06
75/02/C6
75/02/24
75/03/24
Til";
OF
CAY
11 25
13 5C
11 45
11 CC
1C 25
13 15
1C 54
11 00
1C 3C
1C CC
10 55
FE£T
00630
NC2CNC3
N-TCTAL
MG/L
0.032
0.068
0.040
0.060
0.024
0.032
0.003
0.024
0.016
0.024
0.043
OC625
TCT KjcL
N
NG/L
0.600
C.500
0.900
0.500
C. 300
0.700
C.600
C.400
0.800
C.300
0.800
CC61C
M-3-N
TCT..ML
^G/L
0.036
0.025
C.C70
C.055
C.G15
C.C45
0.020
C.C24
0.040
c.oee
C.C48
00671
PHCS-CIS
3J5TI-0
MG/L P
0.016
G.025
C.02C
0.015
C.010
C.G2C
C.010
C.C1C
0.016
c.ooe
c.ou
00665
FHGS-TGT
*G/L P
0.045
0.060
C.C65
0.025
0.025
C.C70
0.030
C.C20
C.020
0.020
C.040
-------
STGRfT KcTRIcVAL CATt 75/11/26
NiATL tUTRCPHICATICN SIPV£Y
tPA- LAS VEGAS
2206E1
32 50 50.0 094 07 20. C
22
7.
2MCHY -O 6POG 3 Ml
UlPALrS
c ST H*Y
211UCH
0000 fc-i-T
? JC T
CcPTh
CATF
F^HI*
TO
74/06/08
74/07/06
74/08/10
74/09/07
74/1C/05
74/10/18
74/11/01
74/12/06
75/02/08
75/02/22
75/03/22
75/04/05
75/04/19
00630 00625
TIME OEPTH iMij2£*;03 TOT KJSL
CF N -TOTAL N
CA1
14
12
1C
10
C^
14
13
12
11
11
1C
12
13
r FEcT
25
50
5C
35
3C
30
00
CC
50
3C
30
39
40
MG/L
0.044
0.080
0.052
0.048
0.024
0.024
0.024
O.OC8
0.016
0.003
0.009
0.005
0.035
h'G/L
0.700
0.400
C.700
0.400
0.300
C. 500
0.600
0.700
C.6CO
0.400
0.550
0.300
1.250
C061C OC671 CC665
Nt-3-N FHCS-CIS PhCS-TOT
TCTAL CSTH'J
fG/L
C.C25
0.025
0.100
0.030
0.045
C.C55
C.025
0.027
0.024
0.024
0.018
C.015
C.090
KG/L f
C.C2C
C.020
C.C4C
C.C15
0.010
C.Ci.5
0.015
0.010
0.006
0.008
O.C05
C.C10
0.015
fC/l P
C.C65
C.CfcO
0.060
C.C30
0.040
C.030
C.C40
0.040
C.020
0.045
0.030
C.C10
0.030
-------
STfi^FT PC-TRI6VAL DATfc 75/11/26
NATL eUTSOPHICATIGN SLRVLY
PPA- 1.4S VEGAS
2206F1
32 51 15.C CS4 06 40.C
JAMiS E4YQU
22 7.5 TP;r.S
T/CACC-j LAKE
2NOt}Y or eacC 4 MI NE ST hWY 4S JC T
11_PAL=3 2111204
4 CCOC reel DzPTh
TATF
TO
74/06/08
74/07/06
74/08/10
74/09/07
74/10/05
74/10/18
74/ll/lC
74/12/06
75/01/11
75/02/08
75/02/22
75/03/06
75/03/22
75/04/05
75/04/1S
00630 CC625
TIKT TdPTI- NC2CNC3 TCT KJfL
OF N-TOTAL N
CAY FE£T
14
12
10
Cc.
OS
10
11
13
ce
14
09
11
11
09
1C
35
45
40
25
15
40
CC
00
3C
5C
30
05
30
30
5C
MG/L
0.
0.
0.
0.
0.
0.
096
080
008
044
040
024
0.012
0.
0.
0.
0.
0.
0.
0.
0.
008
008
008
008
016
009
015
035
^G/L
0.
C.
1.
0.
C.
0.
C.
C.
0.
C.
0.
C.
C.
0.
1.
500
600
600
500
400
400
500
800
300
650
400
900
500
350
050
CC61C 00671 00605
NhB-N PHOS-CIS PHGS-TGT
1UAL GRTHO
PG/L
0.
C.
C.
0.
C.
C.
0.
C.
0.
0.
0.
0.
C.
C.
C.
030
020
025
040
C25
055
035
C65
016
016
024
032
C16
CIS
050
MG/L
0.
0.
C.
C.
0.
C.
0.
C.
0.
C.
C.
0.
0.
0.
0.
F
020
020
QIC
020
015
020
015
015
010
016
016
008
010
015
020
fG/L F
C.C50
O.C65
C.120
0.035
0.040
C.C35
0.040
C.032
C.C30
0.025
C.C50
0.060
0.030
0.015
C.040
-------
STfUET RETRIEVAL OATfc 75/11/26
NATL EUTROPI-ICATICN SlJ*V"Y
SPA- LAS VEGAS
2206G1
•2 51 5C.C C94 C3 45.C
rUNTS C«rcK
22 7.5 IR::S
T/CACCO LAKH
2Nu*Y »C cPOG ^ M T w 'jc VIVIAN
II-:P*L = S 2HiiO't
4 OCOC r^i:l OcPTH
00630 CC625
OATfc TIME CcPTI- NC2CH03 TCT KJ2L
FROM u= N-TGTAL f\
TO DAY F5ET MG/L KG/I
CC61C OC671 C0665
M-2-N FHOS-CIS Pt-CS-TjT
TCTAL CRTI-;
t-G/L MG/L F ^G/L f
74/06/08
74/07/06
74/08/10
74/09/07
74/10/05
74/10/18
74/11/10
74/12/06
75/01/11
75/02/08
75/02/22
75/03/22
75/04/05
75/04/19
14
12
10
09
ce
09
1C
14
07
OS
ce
1C
08
10
50
3 5
30
10
3C
30
CC
00
3C
25
40
3C
30
30
0.028
0.080
0 .044
0.048
0.048
0.040
0.012
0.008
0.003
O.Olfc
0.024
0.018
0.020
0.055
1.900
2.70C
0.950
0.600
C.400
0.700
l.CCO
C.700
0.800
1.1 CO
0.500
0.650
C.450
1.800
C.040
C.240
C.065
0.032
C.02C
C.C25
0.035
C.C2C
0.024
0.048
C.048
0.033
C.Q3C
0.115
0.025
C.C3C
0.015
0.015
C.C15
0.015
C.G20
0.015
c.ooe
0.016
0.010
0.015
0.020
C.033
C.100
0.033
0.045
O.C45
0.060
C.C60
C.C40
0.030
C.C40
0.040
0.015
C.C50
-------
STGSFT RfcTSlFVil GiT? 75/11/28
N4TL EUTROPhlCA IIGN SURVEY
fP4- L*S VC-G«S
22061-1
32 47 15.3 093 58
T IG.-:r\ 8".£NCH
22 la VIVIAN
; LAK.:
ST hwY I 5.5
11 :?«i -s
i.O
: s CITY ct
21 11204
CCCC rr^T
TP^ V!V!
Cc?Th
OiTc
F i? 0 f
TO
FEET
C0630 CC625 CC610 00671 OQtt5
NC2CNC3 TO I KJF-L NH3-N FHCS-CIS FHCS-T3T
N-TGTiL N TCTAL bRThF
,«G/L PG/L K-/L HC-/L F ^C-/L F
74/06/09 09 40
74/C7/C6 12 CC
74/08/08 12 13
74/09/07 11 35
74/10/C7 1C 15
74/11/01 12 40
74/12/07 1C 20
75/01/06 1C 30
75/02/06 10 00
75/02/22 C? 2C
75/03/24 10 20
0.040
0.016
0.008
0.06d
O.Olt
0.032
0.008
O.OC3
0.039
0.008
0.024
i.200
0.900
1.200
1.400
C.5CO
1.400
0.600
C.900
C.800
0.700
1.000
C.060
0.030
C.025
0.185
0.020
C.075
0.025
C.040
0.048
0.024
C.C48
0.021
0.015
0.015
O.C25
0.005
C.C25
0.015
C.01C
C.C06
0.008
c.oce
C.115
0.065
C.07!>
O.C75
0.020
C.100
C.C40
C.020
C.030
0.050
C.030
-------
STOScT RETRIEVAL CATF 75/11/26
NiTL EUTPCPHC4TICN SURVcY
£OA- US VEGAS
D-'. TC-
F311C
TO
74/06/CE
74/07/06
74/08/08
74/09/07
74/10/07
74/11/01
74/12/07
75/01/06
75/02/06
75/02/22
75/03/24
nyr
OF
C«Y
1C CC
11 20
1C 35
11 15
13 OC
12 15
12 30
11 CC
10 30
11 25
rftT
2206J1
12 41 5C.O OS4 11 20.C
CYPSESS E4YCL
i2 . HAP.AlSJN OC
T/CACCC LiKc
BSCr, 5T I-*Y 43 2.25 ,«! NW CP KA'NACK
llrPiLtS 2111204
4 0000 ?S.cT O.PTH
00630
iSC2£Nu3
N-TOTAL
PG/L
0.072
0.012
0.004
0.05t
0.056
0.040
0.024
0.048
O.Olt
0.032
0.016
00625
TCT K.J;L
N
^G/L
C.5CO
0.800
0.600
C.950
0.500
0.400
C.500
0.700
C.900
0.600
1.100
CC61C
M-3-N
TC1AL
XC-/L
0.040
C.C15
0.010
C.110
0.025
0.045
C.01C
0.040
C.024
C.C32
C.032
OC671
FhCS-CiS
CRTH:
MG/L ' P
C.020
' 0.005K
0.020
C.C1E
C.030
C.C20
C.02C
0.016
C.Clt
0.016
CC665
PhCS-TjT
^G/L F
0.025
0.080
C.C50
0.055
C.C35
0.07C
0.050
0.045
0.060
C.C60
C.040
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
T R^-TnlcVAL CAT-.- 75/11/23
NATL EUT3TPHICaTION SURVEY
.'PA- LAS VfCAS
2206K1
32 4C 43.0 094 01 40.0
SAUNDtAS bnA,Y_H
2£ 7.5 FCTT:?S FT
T/CAOCi. LAKJ
2;o.:.Y :•;•: e?.cc- o.= ^! v>
D-iTF
FRCI»
TO
74/06/08
74/07/C6
74/09/07
74/10/C7
74/11/01
74/12/07
75/01 /Ct
75/02/06
75/02/24
75/03/24
T 1 v r f
CF
CAY 'r
11 15
1C 45
1C 30
12 30
12 20
12 50
11 3C
11 15
11 15
12 1C
r CtPTh
0063C
NC2END3
N
-TOTAL
MG/L
0.043
0.116
0.064
0.024
0.024
0.024
0.016
0.040
0.040
0.032
CC625
TOT KJ3L
N
^G/L
0.500K
C.7CO
C.300
0.200
C.300
0.700
0.500
C.200
0.350
1.600
CC61C
NI-3-N
TCTAL
^G/L
C.03C
0.015
C.C20
0.005
0.015
C.C2C
0.032
C.C24
0.029
C.032
00671
FHCS-CI S
GPTHC
MG/L F
C.035
0.045
C.C45
0.035
C.025
C.C15
0.020
C.016
0.017
0.024
00665
PhCS-T^T
f-G/L P
C.I 00
0.075
C.C65
O.C60
0.120
C.C50
0.050
0.030
C.030
0.040
v> CF ST P
211120^
CCCO FtcT
DcFTH
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
STflSET PETPIcVAt GATE 75/ll/2t
NATL EUTRGPHCATICN SURVbY
EPA- LAS VtGiS
2206L1
32 48 27.0 CS4 Cl 59.C
fG'NTtS-Y LAKE OUTUrT
22 7.5 TR-'.-S
I/CADCC LAKE
BNK UM'VFRCV£C ? C XING S bC 16
USPALcS 211120^
4 0000 FtiT
Oiff-
FKL!*
TC
74/C6/C8
74/07/06
74/08/10
74/09/07
74/10/05
74/10/18
74/11/10
74/12/06
75/01/11
75/02/08
75/02/22
75/03/07
75/03/22
75/04/1?
00630 00625
ITVf CcPTI- NC2CN03 TCT KJ6L
(.••F N-TCTAL N
C*1
13
13
11
14
10
14
12
15
13
10
1C
11
13
14
1 FC-ET
45
20
10
30
30
40
00
00
00
40
30
3C
30
50
MC/L
0.112
0.020
0.020
0.048
0.024
0.032
0.012
0.016
0.008
0.008
0.008
0.008
0.009
0.020
fG/L
C.500
c.aoo
0.600
C.500
0.400
0.400
0.600
0.600
C.600
C.300
1.000
C.7CO
0.500
0.850
CC61C CC671 CC665
M-2-N fHCS-CiS PI-CS-IJT
KTAL CPTHC
fC/L
C.040
C.C15
0.070
0.035
0.015
0.015
C.G20
C.025
0.016
C.C16
0.040
0.016
0.015
0.035
MG/L P
0.020
C.02C
0.005K
0.015
C.C15
0.010
0.015
C.010
0.010
o.oce
0.008
0.016
o.cc?
0.015
PG/1 P
0.060
O.C70
0.035
0.040
O.C35
0.032
0.050
C.040
0.030
C.C30
C.C60
0.050
C.C30
0.040
JjPTh
__ K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
ST03ET RETRIEVAL DATE 75/11/28
NATL EUTROPHCATION SURVEY
EPA- LAS VEGAS
2206XA PC2206XA
22 47 C5.0 CS4 2C CC. C
TX
P002866
22 7.5
T/CADDJ LAK£
BLACK CYPStSS BAYOU
DATE
Tu
74/10/15
74/11/15
74/12/02
75/C1/18
75/02/05
75/03/12
75/04/05
75/05/13
75/06/C4
75/07/03
75/08/10
00630
TIKC CtPTt- NG2CN03
OF N-TGTAL
DAY FPET
09
14
14
12
10
09
11
16
CS
14
13
30
3C
00
50
30
00
CC
30
CO
CC
00
MG/L
0.280
0.320
0.320
0.160
0.160
0.080
0.050
0.150
0.100
0.1CO
0.150
00625
TCT KJcL
N
MG/L
5.600
6.4CO
6.600
10.500
1.700
13.000
14. SCO
6.500
5.000
9.200
6.200
lU'PALES 2141204
4 . CCOC FctT
CC61C OC671 00665 50051 50053
NH2-N FHQS-CIS PhCS-TOT FLCh CCNCU1T
TCTAL CPTH3 RAT; FLCh-MGC
PG/L
C.590
0.720
C.860
2.200
C.360
2.6CC
4.800
C.2CO
0.050K
C.130
0.325
MG/L P
6.200
4.40C
4.2CO
4.500
0.245
4.SOO
5.100
2.SOC
2.500
5.100
6.70C
fG/L f IKST fGC MCNTHLY
6
4
5
5
C
5
5
3
7
6
7
.600
.700
.500
.500
.520
.900
.900
.600
.200
.000
.200
0.30C
0.350
0.300
0.400
1.400
0.35C
0.300
1.400
i.eoc
0.400
0. 200
C
0
0
C
0
C
C
1
1
0
0
.3CO
.300
.300
.300
.400
.350
.3CO
.400
.800
.400
.SCO
DEPTH
K VALUE KNOWN TO BE LESS THAN
INDICATED
-------
STC=9T PETFIcVAL CiTc 75/11/28
N.ATL EUTVTPl-ICATtCM Sl=V:EY
- LiS V£C-£S
220621 T?2iC621
32 41 15.0 092 57 2C.C
y-CIirtl NGSP'T-r T
22 la MC-- I \GSPCRT
C/CACCC laK-
PCCC650
00630 00625
P;iTF TIM? DcPTH NG2£iN03 TOT KJtL
F«r>|k (.1 N -TOTAL N
TO
74/09/06
CPIT)-
74/09/06
74/10/07
CP( T)-
74/10/07
74/11/05
C P ( T ) -
74/11/05
74/12/05
cpm-
74/12/05
75/01/05
CP(T)-
75/01/05
75/02/05
CP(T)-
75/02/05
75/03/05
C P ( T ) -
75/03/05
75/04/06
CP(T)-
75/04/06
75/05/05
CP(T) -
75/05/05
11
16
11
16
11
16
11
16
11
16
11
16
11
16
11
It
11
16
V FEET
00
CC
00
cc
00
cc
00
cc
00
cc
00
cc
00
cc
00
cc
00
oc
MG/L fG/i
0.040 28
0.400 34
1.120 7
0.880 12
0.640 12
0.640 8
0.720 8
2.640 17
0.400 15
.000
.000
.900
.000
.000
.000
.600
.500
.000
CC61C
TCT4L
!»C/L
15.000
16.000
2.500
7.60C
4.400
2.600
2.880
1.100
2.500
OC671
FHCS-:;S
O'f Tt-
yc-/L
1C.
?.
c.
3.
1.
1.
C.
C.
c.
o
F
000
780
915
30C
55C
200
71C
44C
77C
CADDO LiKi
ilc°4L £S
CC665 50051
Ft-CS-TOT FLCW
NC-/L P
12. £00
12.000
2.000
4.400
3.300
4.400
1.7CO
6.400
2.0CO
3A1
INST
C.
C.
C.
0.
c.
c.
c.
0.
c.
,:
fGC
C6C
C6C
C6C
C6C
C6C
C6C
C6C
C6C
C6C
OJO
5CC53
CCNOUIT
rL•:^^-^GC
."CNTHLY
C.C65
C.C65
C.C65
C.C65
C.C65
C.C65
C.C65
C.C65
C.C65
-------
APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1974
STATES OF LOUISIANA AND TEXAS
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
2301 ANACOCO LAKE
2202 RRUIN LAKE
2203 LAKE 8ISTINE4U
2204 BLACK SAYOU
2205 9UNDICK LAKE
2207 COCODRIE LAKE
2208 COTILE LAKE
2209 CONCOROIA LAKE
2210 CROSS LAKE
2211 D'ARBONNE LAKE
2212 FALSE RIVER LAKE
2213 INDIAN CREEK
2214 SALINE LAKE
2215 TURKEY CREEK LAKE
2216 LAKE VERRET
2217 LAKE VERNON
2219 BLACK LAKE
2220 COCODRIE
4807 CADDO LAKE
MEDIAN
TOTAL P
0.031
0.057
0.061
0.046
0.157
0.090
0.037
0.076
0.057
0.038
0.062
0.031
0.111
0.176
0.163
0.018
0.077
0.106
0.049
MEDIAN
INORG N
0.080
0.250
0.100
0.090
0.135
0.400
0.100
0.080
0.060
0.100
0.130
0.150
0.350
0.170
0.100
0.120
0.150
0.050
0.070
500-
MEAN SEC
455.833
450.333
458.000
453.417
469.667 ,
479.000
442.333
468.333
475.250
458.250
442.500
458.333
493.000
477.833
481.428
436.667
454.000
478.333
463.562
MEAN
CHLORA
8.700
16.350
12.933
17.818
20.467
35.300
12.650
32.950
38.385
6.800
24.550
21.467
15.333
21.967
62.028
4.900
12.733
33.433
20.125
15-
MIN 00
10.400
15.000
13.200
12.200
10.600
7.700
14.000
14.800
11.400
13.200
14.900
14.800
9.600
14.600
12.000
14.400
11.600
11.800
10.000
MEDIAN
DISS ORTHO °
0.007
0.012
0.018
0.009
0.073
0.026
0.011
0.009
0.010
0.011
0.023
0.010
0.025
0.033
0.056
0.007
0.015
0.014
0.008
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBEK OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
2201 ANACOCO LAKE
3202 BRUIN LAKE.
2203 LAKE BISTINE»U
2204 SLACK BAYOU
2205 flllNDICK LAKE
2207 COCODRIE LAKE
2208 COTILE LAKE
2209 CONCORDIA LAKE
2210 CROSS LAKE
2211 D'ARBONNE LAKE
2212 FALSE RIVER LAKE
2213 INDIAN CREEK
2214 SALINE LAKE
2215 TURKEY CREEK LAKE
2216 LAKE VERRET
2217 LAKE VERNON
2219 BLACK LAKE
2220 COCODRIE
4807 CAOOO LAKE
MEDIAN
TOTAL P
92
61
50
72
11
28
83
44
56
78
33
92
17
0
6
100
39
22
67
{ 16)
( 11)
( 9)
( 13)
( 2)
( 5)
( 15)
( 8)
( 10)
( 14)
( 6)
( 16)
( 3)
( 0)
( 1)
( 18)
( 7)
( 4)
( 12)
MEDIAN
INORG N
83 (
11 (
58 (
72 (
33 (
0 (
58 (
83 (
83 (
58 (
39 (
28 (
6 (
17 (
58 (
44 (
22 (
100 (
94 (
14)
2)
9)
13)
6)
0)
9)
14)
14)
9)
7)
5)
1)
3)
9)
8)
4)
18]
17)
500-
McAN SEC
67
83
61
78
33
11
94
39
28
56
89
50
0
22
6
100
72
17
44
( 12)
( 15)
( 11)
( 14)
( 6)
( 2)
( 17)
( 7)
( 5)
( 10)
< 16)
( 9)
( 0)
( 4)
( 1)
( 18)
( 13)
( 3)
( 8)
MEAN
CHLORA
89 (
61 (
72 (
56 (
44 (
11 (
83 (
22 (
6 (
94 (
28 (
39 (
67 <
33 (
0 (
100 (
78 (
17 (
50 (
16)
11)
13)
10)
8)
2)
15)
4)
1)
17)
5)
7)
12)
6)
0)
18)
14)
3)
9)
15-
MIN DO
83
0
42
50
78
100
33
14
72
42
6
14
94
22
56
28
67
61
89
( 15)
( 0)
( 7)
( 9)
( 14)
( 18)
( 6)
( 2)
( 13)
( 7)
( 1)
( 2)
( 17)
( 4)
( 10)
( 5)
( 12)
( 11)
( 16)
MEDIAN
OISS ORTHO P
94 (
50 (
33 (
81 (
0 (
17 (
61 (
81 (
69 (
56 (
28 (
69 (
22 (
11 (
6 (
100 (
39 (
44 (
89 (
17)
9)
* )
14)
0)
3)
11)
14)
12)
10)
5)
12)
4)
2)
1)
18)
7)
8)
16)
------- |