U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
CRESCENT LAKE
FLAGLER AND PUTNAM COUNTIES
FLORIDA
EPA REGION IV
WORKING PAPER No, 246
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
•&G.P.O. 699-440
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REPORT
ON
CRESCENT LAKE
FILLER AND PUTNAM COUNTIES
FLORIDA
EPA REGION IV
WORKING PAPER No, 246
WITH THE COOPERATION OF THE
FLORIDA DEPARTMENT OF ENVIRONMENTAL REGULATION
AND THE
FLORIDA NATIONAL GUARD
DECEMBER, 1977
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CONTENTS
Page
Foreword ii
List of Florida Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 4
IV. Nutrient Loadings 8
V. Literature Reviewed 12
VI. Appendices 13
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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, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first, stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is fomatted to provide state environmental
agencies with specific information for basin planning [§303(e)j, water
quality criteria/standards review [§303(c)], clean lakes [5314(a,b)],
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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Ill
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation's
fresh water lakes. Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.
ACKNOWLEDGMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Florida Department of Environ-
mental Regulation for professional involvement and to the Florida
National Guard for conducting the tributary sampling phase of the •
Survey.
Joseph W. Landers, Jr., Secretary of the Department of Environ-
mental Regulation; John A Redmond, former Director of the Division
of Planning, Technical Assistance, and Grants; and Dr. Tim S. Stuart,
Chief of the Bureau of Water Quality, provided invaluable lake docu-
mentation and counsel during the survey, reviewed the preliminary
reports, and provided critiques most useful in the preparation of this
Working Paper series.
Major General Henry W. McMillan (Retired), then the Adjutant
General of Florida, and Project Officer Colonel Hugo F. Windham,
who directed the volunteer efforts of the Florida National Guard,
are also gratefully acknowledged for their assistance to the Survey.
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iv
LAKE NAME
Alligator
Apopka
Banana
Crescent
Doctors
Dora
East Tohopekaliga
Effie
Eloise .
George
Gibson
Glenada
Griffin
Haines
Hancock
Horseshoe
Howe!1
Istokpoga
Jessie
Jessup
Kissimmee
Lawne
Lulu
Marion
Minnehaha
Minneola
Monroe
Munson
Okeechobee
Poinsett
Reedy
Seminole
Semi no!e
South
Talquin
Tarpon
Thonotosassa
Tohopekaliga
Trout
Weohyakapka
Yale
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF FLORIDA
COUNTY
Columbia
Lake, Orange
Pol k
Flagler, Putnam
Clay
Lake
Osceola
Polk
Polk
Putnam, Volusia
Polk
Highlands
Lake
Polk
Polk
Seminole
Orange, Seminole
Highlands
Polk
Seminole
Osceola
Orange
Pol k
Polk
Orange
Lake
Seminole, Volusia
Leon
Glades, Hendry, Martin,
Okeechobee, Palm Beach
Brevard, Orange, Osceola
Pol k
Jackson, FL; Decatur,
Seminole, GA
Pinellas
Brevard
Gadsden, Leon
Pinellas
Hillsborough
Osceola
Lake
Polk
Lake
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BIG
FISHTAIL
SWAMP
CRESCENT LAKE
® Tributary Sampling Site
X Lake Sampling Site
Sewage Treatment Facility
_ s '9 _ |
5 '
_ Scale
Mi
2930—
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CRESCENT LAKE
STORE! NO. 1206
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Crescent Lake is eutrophic. It
ranked fifteenth in overall trophic quality when the 41 Florida
lakes sampled in 1973 were compared using a combination of six
parameters*. Fourteen of the lakes had less median total phos-
phorus, ten had less median dissolved phosphorus, 13 had less
and two had the same median inorganic nitrogen, eight had less
mean chlorophyll a_, and 17 had greater mean Secchi disc trans-
parency.
Survey limnologists observed algal scums and much rooted
emergent vegetation.
B. Rate-Limiting Nutrient:
The algal assay results indicate the lake was nitrogen
limited at the time the sample was collected (03/10/73). The
lake data indicate nitrogen limitation at all sampling stations
and times.
C. Nutrient Controllability:
1. Point sources—It is estimated that 2.9% of the total
phosphorus and 0.9% of the total nitrogen inputs to Crescent
Lake during the sampling year were contributed by the Crescent
* See Appendix A.
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2
City wastewater treatment plant.
The sampling year phosphorus loading of 0.95 g/m2 is over
twice that proposed by Vollenweider (Vollenweider and Dillon,
1974) as a eutrophic loading. However, even complete removal
of phosphorus at the Crescent City treatment plant would only
reduce the loading to 0.93 g/m2/yr; and even though the crit-
ical level for Florida lakes may be higher than that suggested
by Vollenweider (see page 11), it does not seem likely that
the degree of phosphorus reduction attainable by municipal
point-source control would result in an improvement in the
trophic condition of the lake unless other sources of phos-
phorus also can be controlled (see below).
2. Non-point sources—It is estimated that 97.1% of the
total phosphorus loading and 99.0% of the total nitrogen loading
to Crescent Lake were contributed by non-point sources. The
largest contribution was from Haw Creek which accounted for 45.6%
of the total phosphorus and 68.8% of the total nitrogen inputs to
the lake.
The 1966 Flagler County General Highway Map indicates that
land use in the Haw Creek drainage basin is both urban and
agricultural, and it is probable that any significant improve-
ment in the trophic condition of Crescent Lake would require
reduction of the Haw Creek phosphorus export as well as phos-
phorus control at the point source discussed above.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphometry :
1. Surface area: 70.61 kilometers2.
2. Mean depth: 2.0 meters.
3. Maximum depth: 3.4 meters.
4. Volume: 141.220 x 106 m3.
5. Mean hydraulic retention time: 153 days.
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (Ion2)* (m3/sec)*
Haw Creek 906.5 7.93
Unnamed Creek C-l 98.4 0.85
Minor tributaries &
immediate drainage - 214.3 1.88
Totals 1,219.2 10.66
2. Outlet -
Dunns Creek 1,289.8** 10.67
C. Precipitation***:
1. Year of sampling: 128.7 centimeters.
2. Mean annual: 136.8 centimeters.
t Table of metric conversions—Appendix A.
tt No bathymetric map available. Surface area calculated from the General
Highway Map of Putnam County; depths estimated from soundings reported
in Appendix D.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Includes area of lake.
*** See Working Paper No. 175.
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4
III. WATER QUALITY SUMMARY
Crescent Lake was sampled three times in 1973 by means of a
pontoon-equipped Huey helicopter. Each time, samples for physical
and chemical parameters were collected from two depths at three
stations on the lake (see map, page v). During each visit, a single
depth-integrated (near bottom to surface) sample was composited from
the stations for phytoplankton identification and enumeration; and
during the first visit, a single 18.9-liter depth-integrated sample
was composited for algal assays. Also each time, a depth-integrated
sample was collected from each of the stations for chlorophyll a^
analysis. The maximum depths sampled were 2.1 meters at station 1,
2.7 meters at station 2, and 3.4 meters at station 3.
The sampling results are presented in full in Appendix D and
are summarized in the following table.
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PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNDCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
OPTHO P (MG/L)
N02+N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A
SECCHI (METERS)
A. SUMMARY OF PHYSICAL AND
IS! SAMPLING ( 3/10/73)
3 bITES
CHEMICAL CHARACTERISTICS FOR LAKE CRESCENT
STORET CODE 1206
2ND SAMPLING ( 9/ 7/73)
3 SITES
3RD SAMPLING <
3 SITES
8/73)
RANGt-.
19. V
7.0
300.
7.5
10.
0.046
0.023
0.160
O.OfciO
v.,900
0.240
1.060
1.1
0.5
- 21.4
7.1
- 360.
7.d
13.
- 0.065
- 0.039
- 0.200
- u.l 1C
- 1.100
- 0.280
- 1.270
2.0
0.6
MtAN
20.6
7.0
334.
7.6
11.
0.0b4
0.02Q
0.172
0.088
1.000
0.260
1.172
1.5
0.6
MEDIAN
20. t
7.0
338.
7.6
10.
0.050
0.02o
0.17u
0.0*0
1.000
0.255
1.170
1.3
0.6
KANGE
23.3
5.0
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B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
03/10/73
09/07/73
11/08/73
2. Chlorophyll a^ -
Sampling
Date
03/10/73
09/07/73
11/08/73
Dominant
Genera
1. Flagellates
2. Melosira sp.
3. Lyngbya s£.
4. Coscinodiscus sp.
5. Pennate diatoms
Other genera
Total
1. Lyngbya sp_.
2. Oscillatoria sp.
3. Melosira sp.
4. Dactylococcopsis sp.
5. Microcystis sp.
Other genera
Total
1. Oscillatoria sp.
2. Flagellates
3. Melosira sp.
4. Cyclotella sp.
5. Lyngbya sp.
Other genera
Total
Station
Number
1
2
3
1
2
3
1
2
3
Algal units
per ml
132
115
33
33
33
99
445
6,710
4,730
880
880
880
5,500
19,580
3,
2,
1,
1,
1,
975
934
325
186
136
5,836
16,392
Chlorophyll a
2.0
1.3
1.1
19.4
18.8
15.5
1.9
12.7
19.2
-------
0.031
0.081
0.081
0.031
0.108
0.108
1.108
1.108
4.3
4.8
23.3
6.8
7
C. Limiting Nutrient Study:
1. Filtered and nutrient spiked -
Ortho P Inorganic N Maximum yield
Spike (mg/1) Cone, (mg/1) Cone, (mg/1) (mg/1-dry wt.)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
2. Discussion -
The control yield of the assay algal, Selenastrum capri-
cornutum, indicates that the potential primary productivity
of Crescent Lake was moderately high at the time the sample
was collected (03/10/73). Also, the lack of significant
increase in yield with the addition of orthophosphorus until
nitrogen was also added indicates that the lake was limited
by nitrogen at that time. Note that the addition of nitrogen
alone resulted in a yield greater than that of the control.
The lake data also indicate nitrogen limitation. Following
is a tabulation of the mean inorganic nitrogen/orthophosphorus
ratios for each of the sampling stations and times with the
indicated limiting nutrient in parentheses.
Station 03/10/73 09/07/73 11/08/73
1
,2
3
6/1
11/1
11/1
(N
(N
(N
2/1
4/1
4/1
(N)
(N)
(N)
2/1
2/1
2/1
(N)
(N)
(N)
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8
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Florida National
Guard collected monthly near-surface grab samples from each of the
tributary sites indicated on the map (page v). Sampling was begun in
March, 1973, and was completed in February, 1974.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the Florida District Office of the U.S. Geological Survey for the
tributary sites nearest the lake.
In this report, nutrient loads for sampled tributaries were deter-
mined by using a modification of a U.S. Geological Survey computer
program for calculating stream loadings*. Nutrient loads for unsampled
"minor tributaries and immediate drainage" ("II" of U.S.G.S.) were
estimated using the means of the nutrient loads, in kg/km2/yr, at stations
B-l and C-l and multiplying the means by the II area in km2.
The operator of the Crescent City wastewater treatment plant sub-
mitted only one effluent sample. Therefore, nutrient loads were esti-
mated at 1.134 kg P and 3.401 kg N/capita/year, and flows were esti-
mated at 0.3785 m3/capita/day.
* See Working Paper No. 175.
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A. Waste Sources:
1. Known municipal* -
Name
Pop.
Served
Treatment
Mean Flow
(m3/d)
Crescent City 1,734** act. sludge 656.3
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/
Source yr
a. Tributaries (non-point load) -
Haw Creek 30,680
Unnamed Creek C-l 13,340
b. Minor tributaries & immediate
drainage (non-point load) - 18,215
c. Known municipal STP's -
Crescent City 1,965
d. Septic tanks*** - 15
e. Known industrial - None
f. Direct precipitation**** - 3,110
Total 67,325
2. Outputs -
Lake outlet - Dunns Creek 33,775
3. Net annual P accumulation - 33,550 kg.
Receiving
Water
Crescent Lake
% of
total
45.6
19.8
27.1
2.9
< 0.1
4.6
100.0
* Anonymous, 1971.
** 1970 Census.
*** Estimate based on 55 lakeshore dwellings; see Working Paper No. 175.
**** Brezonik and Shannon, 1971.
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10
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
Haw Creek 455,315 68.8
Unnamed Creek C-l 50,415 7.6
b. Minor tributaries & immediate
drainage (non-point load) - 108,650 16.4
c." Known municipal STP's -
Crescent City 5,895 0.9
d. Septic tanks* - 585 < 0.1
e. Known industrial - None
f. Direct precipitation** - 40.950 6.2
Total 661,810 100.0
2. Outputs -
Lake outlet - Dunns Creek 549,230
3. Net annual N accumulation - 112,580 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Haw Creek 34 502
Unnamed Creek C-l 136 512
* Estimate based on 55 lakeshore dwellings; see Working Paper No. 175.
** Brezonik and Shannon, 1971.
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11
E. Yearly Loads:
In the following table, the existing phosphorus loadings
are compared to those proposed by Vollenweider (Vollenweider
and Dillon, 1974). Note, however, that Florida lakes may be
able to assimilate phosphorus at a somewhat higher level than
that suggested by Vollenweider (Shannon and Brezonik, 1972).
Essentially, Vollenweider's "dangerous" loading is one
at which the receiving water would become eutrophic or remain
eutrophic; his "permissible" loading is that which would result
in the receiving water remaining oligotrophic or becoming oligo-
trophic if morphometry permitted. A mesotrophic loading would
be considered one between "dangerous" and "permissible".
Vollenweider's model may not be applicable to water bodies
with short hydraulic retention times.
Total Phosphorus Total Nitrogen
Total Accumulate? Total Accumulated
grams/m2/yr 0.95 0.48 9.4 1.6
Vollenweider phosphorus loadings
(g/m2/yr) based on estimated mean depth and
hydraulic retention time of Crescent Lake:
"Dangerous" (eutrophic loading) 0.44
"Permissible" (oligotrophic loading) 0.22
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12
V. LITERATURE REVIEWED
Anonymous, 1971. Inventory of municipal waste facilities. EPA
Publ. OWP-1, vol. 4, Wash., DC.
Brezonik, Patrick L. and Earl E. Shannon, 1971. Trophic state of
lakes in north central Florida. Publ. No. 13, FL Water Resources
Res. Ctr., U. of FL, Gainesville.
Shannon, Earl E., and Patrick L. Brezonik, 1972. Relationships
between lake trophic state and nitrogen and phosphorus loading
rates. Env. Sci. & Techn. 6^ (8): 719-725.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research.
Natl. Res. Council of Canada Publ. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
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VI. APPENDICES
13
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
1201 ALLIGATOR LAKE
1202 LAKE APOPKA
1203 LAKE BANANA
1206 LAKE CPESCENT
1207 DOCTORS LAKE
1208 LAKE DORA
1209 LAKE EFFIE
1210 LAKE GEORGE
1211 LAKE GIdSON
1212 GLENADA LAKE
121* LAKE GRIFFIN
1215 LAKE HAINES
1217 LAKE HANCOCK
1219 LAKE HORSESHOE
1220 LAKE HQXELL
1221 LAKE ISTOKPOGA
122J LAKE JESSUP
1224 LAKE KISSIMMtt
1227 LAKE LIPLU
1228 LAKE MARION
1229 LAKE MINNErlAHA
1230 LAKE MINNEOLA
1231 LAKE MONROE
1232 LAKE OKEECHOdEE
123-. LAKE POINSETT
1236 LAKE PFEOY
1238 LAKE SOUTH
1239 LAKE TALQUIN
MEDIAN
TOTAL P
0.62C
0.102
0.660
0.065
0.084
0.102
1.480
0.129
0.167
0.134
0.119
0.063
0.772
0.034
1.260
0.039
0.492
0.034
1.490
0.044
0.03H
0.018
0.138
0.063
0.065
0.033
0.074
0.085
MEDIAN
INO^G N
0.26C
0.230
0.260
0.130
0.120
0.240
0.410
0.165
0.115
0.165
0.260
0.115
0.195
0.130
0.285
0.120
0.290
0.145
1.065
0.260
0.080
0.070
0.300
0.185
O.lSO
0.330
0.130
0.290
500-
MEAN StC
47-.. 000 •
484.1 76
482.667
473.889
465.555
482.889
489.000
469.308
470.000
454.167
481.333
462.667
483.500
459.000
464.000
464.222
487.000
463.667
483.000
468.833
43b.OOO
406.333
474.555
472.366
••69.000
468.500
464.000
462.167
MEAN
ClLO^A
B7.733
4-3.611
208.600
10.211
27.100
59.978
261.433
35.000
19.675
27.667
66.855
26.567
97.900
12.067
54.117
6.594
76.550
24.142
276.566
29.967
8.733
3.333
14.225
14.524
6.500
34.837
23.167
9.483
15-
MIN DO
13.100
8.200
3.600
10.200
10.600
7.400
15.000
11.000
10.200
14.700
6.600
10.600
5.600
11.500
9.000
8.600
7.600
8.800
14.300
7.600
7.700
7.400
10.800
9.800
10.600
10.600
9.000
14.400
MEDIAN
DISS OriTrtO
0.3tSb
0.019
0.293
0.033
0.028
0.022
0.950
0.063
0.069
0.072
0.038
0.014
0.1SB
0.023
1.175
0.010
0.2H8
0.007
1.030
0.016
0.012
0.009
0.1 2C.
0.010
0.031
0.008
0.028
0.031
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LAKE DATA TO BE USED IN RANKINGS
CODE LAKE NAME
1240 LAKE THONOTOSASSA
1241 LAKE TOHOPEKALIGA
1242 TROUT LAKE
1243 LAKE MEOHfAKAPKA
1246 LAKE YALE
1247 LAKE MUNSON
1248 LAKE SEMINOLE
1249 LAKE LAtfNE
12SO LAKE TARPON
1252 LAKE ELOISE
125B LAKE JESSIE
1261 EAST LAKE TOHOPEKALIGA
1264 PAYNE'S PWAIRIE LAKE (NO
MEDIAN
TOTAL P
0.6*5
0.246
1.110
0.047
0.027
1.475
0.234
?.S60
0.041
0.486
0.051
0.042
1.260
MEDIAN
1NORG N
0.095
0.200
0.650
0.080
0.160
0.925
0.17S
1.350
0.070
0.170
0.090
0.070
0.140
500-
MEAN SEC
466.167
472.917
472.000
458.667
441.000
486.667
473.833
494.667
400.889
465.333
452.667
440.833
476.000
MEAN
CHLOSA
37.700
30.633
76.1*67
7.767
25.367
140.317
102.000
84.900
6.867
70.233
26.300
5.167
88.200
15-
MIN DO
10.200
10.500
12.900
8.200
7.600
12.200
0.600
10.400
9.000
12.200
10.800
9.400
7.400
MEDIAN
OISS OHTrlO P
0.565
0.152
0.970
0.011
0.014
0.852
0.026
0.117
O.U27
0.339
0.011
0.007
1.210
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PERCENT or LAKES *ITH HIGHER VALUES (NUMBER OF LAKES »ITH HIGHEH VALUES)
LAKE
COUE
1201
1202
1203
1206
1207
1208
1209
1219
1211
1212
1214
1215
1217
1211
1220
1221
1223
122*
1227
1228
1229
1230
1231
1232
123*
1236
123tt
1239
LAKE NAME
ALLIGATOR LAKE
LAKE APODKA
LAKE BANANA
LAKE CRESCENT
DOCTORS LAKE
LAKE DOWA
LAKE EFF1E
LAKE GEORGE
LAKE GIBSON
GLENAOA LAKE
LAKE GRIFFIN
LAKE HAINES
LAKE HANCOCK
LAKL MORSESHOt
LAKE NOVELL
LAKE I^TOKPOGA
LAKE JESSUP
LAKE KISSIMMEE
LAKE LULU
LAKE MARION
LAKE. MINNE^AHA
LAKE MINNEOLA
LAKE MONSUE
LAK£ OKEECHOdEE
LiKE "31NSETT
LAKE HEFOf
LAKE SOUTH
LAKE TALOU1N
MEDIAN
TOTAL P
25
SO
23
65
60
S3
5
45
40
43
4P
70
18
93
11
85
28
90
3
78
88
100
38
68
58
95
63
55
( 10)
( 23)
I 9)
( 26)
I 24)
( 21)
( 2)
( If l
( 16)
( 17)
( 19)
( 29)
( 7)
1 37)
( 4)
( 34)
1 11)
( 361
( 1)
( 31)
( 351
I 40)
( 15)
( 27)
( 23)
( 35)
( 251
1 22)
MEDIAN
INORG N
29
38
29
70
76
35
10
54
61
54
29
31
43
/a
23
76
1"
63
3
29
91
98
IS
45
60
13
70
20
< 10)
( 15)
I 10)
( 27)
( 301
( 14)
( 4)
( 21)
( 32)
< 21)
( 10)
( 32)
( 17)
( 27)
( 9)
I 30)
( 7)
( 25)
I 1)
I 10)
I 36)
( 3tU
( 6)
< 1H)
( 24)
< SI
( 27)
( "I
500-
MEAN SEC
30
10
20
33
60
18
3
4t<
45
85
23
75
13
00
69
65
5
73
15
53
95
98
20
40
50
55
69
Yd
( 12)
( 4)
< 81
1 13)
( 24)
< 7)
< 1)
( 19)
( Id)
< 34)
( 91
( 301
( 5)
I 32)
( 27)
< 56)
< 21
< 29)
I 6)
( 21)
( 38)
( J9I
( 111
( 16)
( 201
I 221
( 27)
1 31)
MEAN
CHLORA
18
3d
5
80
55
33
3
43
70
S3
30
58
13
7W
35
93
25
oS
0
50
35
100
/5
73
95
45
68
H3
( 71
( 15)
( 21
( 32)
< 22)
1 131
( 1>
• 171
( 28)
I 21)
I 12)
1 23)
< 5)
( 31)
( l->
1 37)
( 10)
( 261
1 0)
1 20)
( 34)
( 40)
1 30)
( 29)
( 38)
( lo)
1 27)
( 331
15- MEDIAN
MIN 00 OISS ORTHO P
10
74
100
48
34
90
0
23
48
3
95
34
98
20
60
69
B3
65
8
83
78
90
26
53
34
34
bO
5
( 4)
( 29)
( 40)
( 18)
( 12)
( 35)
1 0)
( 9)
( 18)
( D
( 38)
I 12)
( 39)
( 8)
( 23)
( 27)
( 32)
( 26)
< 3)
( 32)
( 31)
< 35)
( 10)
( 21)
( 12)
( 12)
( 231
( 2)
18 I
70 (
23 (
50 (
56 I
68 (
10 (
43 (
40 (
38 (
48 <
78 (
2S (
65 (
3 (
89 (
25 (
99 I
5 <
73 (
80 1
93 (
33 (
89 (
45 (
95 (
56 (
53 I
7)
261
9)
20)
22)
27)
4)
17)
16)
15)
19)
31)
11)
26)
1)
351
101
J9)
21
291
32)
37)
131
35)
IB)
33)
22)
21)
INJE*
NO
130
2dO
200
346
341
297
31
256
324
276
273
396
213
406
201
477
1H4
4D5
34
366
517
379
215
36*
342
3J/
3d6
294
-------
PERCENT OF LAKES «ITM nIGHER VALUES (NUMBER OF LAKES *ITH HIGHER VALUES)
LAKE
CODE
1240
1301
1242
1243
1246
1247
12*8
1249
1250
1252
1258
1261
126*
LAKE NAME
LAKE THONOTOSASSA
LAKE TOHOPEKALIGA
TROUT LAKE
LAKE XEOHYAKAPKA
LAKE VALE
LAKE MUNSON
LAKE SEMINOLE
LAKE LAWNE
LAKE TARPON
LAKE EL01SE
LAKE JESSIE
EAST LAKE TOHOPEKALIGA
PAYNE'S PRAIRIE LAKE HO
MEDIAN
TOTAL t>
20
33
15
75
9B
8
35
0
83
30
73
80
11
( 8)
1 13)
( 6)
I 30)
I 39)
( 3)
( l
-------
LAKES RANKED Br INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
i 1230 LAKE MINNEOLA 579
2 1261 EAST LAKE TOHQPEKALIGA 523
3 1289 LAKE MINNEHAMA 517
4 12*3 LAKE WEOHYAKAPrA 495
5 1250 LAKE TARPON 491
6 1221 LAKE ISTOKPOGA 477
7 1246 LAKE YALE 467
6 1224 LAKE KISSIMMEE 455
9 1258 LAKE JESSIE 419
10 1219 LAKE HORSESHOE 406
11 1215 LAKE HAINES 396
12 1238 LAKE SOUTH 386
13 1232 LAKE OKEECHUBEE 3t-B
14 122S LAKE MARION 366
15 1206 LAKE CRESCENT 346
16 1234 LAKE POINSETT 342
17 1207 DOCTORS LAKE 341
18 1236 LAKE «EEOT 337
19 1211 LAKE GIBSON 3?4
20 1208 LAKE DORA 297
21 1239 LAKE TALOUIN 294
22 1202 LAKE APOPKA 280
23 1212 GLENADA LAKE 276
24 1214 LAKE GRIFFIN 273
25 1240 LAKE THONOTOSASSA 266
26 124B LAKE SEMINOLE 260
27 1210 LAKE GEORGE 256
28 1241 LAKE TOHOPEKALIGA 229
-------
LAKES RANKED 8r INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
29 1231 LAKE MONROE 215
30 1217 LAKE HANCOCK 213
31 1252 LAKE EL01SE 207
32 126* PAYNE'S PRAIRIE LAKE (NO 206
33 1220 LAKE HOHELL 201
3* 1203 LAKE BANANA 200
35 1223 LAKE JESSUP 18".
36 izoi ALLIGATOR LAKE 130
37 12*2 TROUT LAKE 110
38 1249 LAKE LAWNE 98
39 1247 LAKE MUNSON 58
«0 1227 LAKE LULU 3
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS -
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles.
Meters x 3.281 = feet
Cubic meters x 8.107 x 10 ~4 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 - cubic feet/sec
Centimeters x 0.3937 = inches
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR FLORIDA
8/25/75
LAKE CODE 1206
CRESCENT LAKE
TOTAL DRAINAGE AREA OF LAKE
-------
TRIBUTARY FLOW INFORMATION FOR FLORIDA
8/25/75
LAKE CODE 1306 CRESCENT LAKE
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
1206C1
12U6ZZ
3
4
5
6
7
e
9
10
11
12
1
2
3
4
5
6.
7
8
9
10
11
12
1
2
73
73
73
73
73
73
73
73
73
73
74
74
73
73
73
73
73
73
73
73
73
73
74
74
0.76
0.62
0.11
0.03
0.14
0.34
1.16
1.90
0.34
0.17
0.28
0.08
1.70
1.44
0.23
0.20
0.31
0.76
2.58
4.22
0.74
0.74
0.62
0.20
18
14
16
16
18
14
13
17
17
21
15
18
14
16
16
18
14
13
17
17
21
15
FLOW DAY
0.93
0.74
0.06
0.23
0.28
1.05
2.27
0.25
0.59
0.20
0.06
2.04
1.64
0.11
0.45
0.59
2.32
5.04
0.59
1.27
0.42
0.14
FLOW DAY
FLOW
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
SI'ORET wETrtlEVAu DATE 75/01/30
120601
29 23 15.0 081 28 20.0
LAKE CKE5CENT
12107 FLOWIOA
DATE TIME OtPTH
FROM OF
TO DAY FEET
73/03/10 14 30 0000
14 30 OOUb
73/09/07 09 i.5 0000
09 45 0007
73/11/08 09 20 0000
09 2li OOOb
DATE TIME Ot^TH
FtfOM OF
TO DAY FEET
73/03/10 14 30 0000
14 30 UOvb
73/09/07 U9 45 UOUO
09 45 UU07
73/11/08 09 20 0000
09 20 0005
0 0 0 1 U
WATER
TEMP
CENT
20.6
20.2
28.5
Stt.b
21.7
21.1
0066b
pHus-Tur
MG/L P
0.064
vi.Obb
O.u76
H.072
0.129
0.116
00300 Ouo77 00094
DO TKANSP CivlUUCTVY
SECCHI FIELD
MG/L INCHES MICKOMHO
18 300
7.0 310
5.6 33 439
5.0 436
16 26b
4.8 270
32217
CHLSPhYL
A
OG/L
2.0
19.4
1.9
11EPALE5 211
3 0009
00400 OOtlO 00610
Pn T ALK NH3-N
CAC03 TOTAL
SU MG/L MG/L
7.50 10K 0.080
7.7u 10K 0.080
7.20 22 0.060
7.10 18 O.OtO
7.30 10K 0.120
7.20 10K 0.090
1202
FEET
00
TOT i
N
MG,
1
0
2
1
1
1
DEPTH
000
0.900
2.100
1.400
1.600
1.400
00630
N02&N03
N-TOTAL
MG/L
0.170
0.160
0.030
0.030
0.060
0.050
00671
PHOS-DIS
ORTHO
MG/L P
0.038
0.038
0.039
0.034
0.082
0.079
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/08/25
120602
29 26 45.0 081 29
LAKE CRESCENT
12107 FLORIDA
DATE
FROM
TO
73/03/10
73/09/07
73/11/08
TIME DEPTH
OF
DAY FEET
15 00 0000
15 00 0006
10 10 0000
10 10 0009
09 30 0000
09 30 0008
00010
WATER
TEMP
CENT
20.3
19.9
28.3
28.3
21.2
21.0
00300 00077 00094
00 TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
7.1
5.6
7.2
24
37
24
315
360
458
459
355
355
11EPALES
3
00400
PH
SU
7.70
7.80
7.20
7.20
7.30
00410
T ALK
CAC03
MG/L
10
13
23
19
22
2111202
0010 FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.080
0.080
0.080
0.080
0.060
00625
TOT KJEL
N
MG/L
1.000
1.000
1.800
1.300
1.100
00630
N02&N03
N-TOTAL
MG/L
0.200
0.170
0.030
0.030
0.020
00671
PHOS-DIS
ORTHO
MG/L P
0.024
0.026
0.030
0.040
0.041
00665 32217
DATE TIME DEPTH PHOS-TOT CHLRPHYL
FROM OF A
TO DAY FEET MG/L P UG/L
73/03/10 15 00 0000 0.047 1.3
15 00 0006 0.049
73/09/07 10 10 0000 0.062 18.8
73/11/03 09 30 0000 0.081 12.7
09 30 0008 0.107
-------
STORET RETRIEVAL DATE 75/08/25
120603
29 29 55.0 081 31 55.0
LAKE CRESCENT
12107 FLORIDA
DATE
FROM
TO
73/03/10
73/09/07
73/11/08
TIME DEPTH
OF
DAY FEET
15 25 0000
15 25 0006
10 25 0000
10 25 0011
09 45 0000
09 45 0006
00010
WATER
TEMP
CENT
21.4
21.3
28.9
28.4
21.5
21.1
00300
DO
MG/L
7.0
6.0
5.4
7.6
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
24
39
20
360
360
463
456
370
369
11EPALES
3
00400
PH
SU
7.50
7.60
7.40
7.40
7.30
7.40
00410
T ALK
CAC03
MG/L
10
10
25
48
22
25
2111202
0010
00610
NH3-N
TOTAL
MG/L
0.110
0.100
0.110
0.060
0.050
0.040
FEET DEPTH
00625
TOT KJEL
N
MG/L
1.100
1.000
1.700
1.60C
1.200
1.100
00630
N02&N03
N-TOTAL
MG/L
0.170
0.160
0.020
0.030
0.010
0.010
00671
PHOS-OIS
ORTHO
MG/L P
0.027
0.023
0.030
0.028
0.027
0.033
DATE
FROM
TO
73/03/10
73/09/07
73/11/08
TIME DEPTH
OF
DAY FEET
15 25 0000
15 25 0006
10 25 0000
10 25 0011
09 45 0000
09 45 0006
00665
PHOS-TOT
MG/L P
0.051
0.046
0.062
0.086
0.065
0.060
32217
CHLRPHYL
A
UG/L
1.1
15.5
19.2
-------
APPENDIX E
TRIBUTARY and WASTEWATER
TREATMENT PLANT DATA
-------
STORE! RETRIEVAL OATE 75/06/25
1206A1
29 34 30.0 081 37 30.0
DUNS CREEK
12105 PUTNAM CO HWY MA
0/CRESCENT LAKE
ST HwY 15 BRDG
11EPALES 2111204
4 0000 FEET DEPTH
OATE TIME DEPTH N02S.N03
FROM OF
TO DAY FEET
73/03/18
73/04/14
73/06/16
73/07/16
73/08/18
73/09/14
73/10/13
73/12/17
74/01/21
74/02/15
17 00
17 05
16 00
12 15
13 20
11 45
11 30
16 30
16 00
0630
!
-------
STORE! RETRIEVAL DATE 75/08/25
120661
29 23 30.0 081 23 00.0
HAW CREEK
12 FLAGER CO HWY MA
I/CRESCENT LAKE
RT 305 8ROG OVER MIDDLE HA* CHEEK
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/03/18
73/04/14
73/06/16
73/07/16
73/08/18
73/09/14
73/10/13
73/11/17
73/12/17
74/01/21
74/02/15
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
15
11
10
10
10
10
10
10
10
09
30
00
30
30
25
00
00
30
30
00
MG/L
0
0
0
0
0
0
0
0
0
0
0
.023
.0^2
.012
.039
.023
.016
.013
.104
.410
.040
.016
MG/L
1
1
2
2
3
1
1
1
2
0
0
.050
.700
.260
.520
.700
.470
.200
.150
.000
.900
.900
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
042
115
078
115
076
060
105
060
270
084
030
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
022
273
039
038
035
025
044
028
520
024
020
MG/L P
0.027
0.280
0.085
0.060
0.035
0.030
0.060
0.050
0.630
0.030
0.035
-------
STORET RETRIEVAL DATE 75/08/35
1206C1
29 26 30.0 081 25 30.0
UNNAMED CREEK
12 PLAGES CO HWY MA
T/CRESCENT LAKE
HODDEN BHDG BELO ST HWY 31a BRDG
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FKOM
TO
73/03/18
73/04/14
73/06/16
73/07/16
73/08/18
73/09/14
73/10/13
73/11/17
73/12/17
74/01/21
74/02/15
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
14
11
09
10
09
09
09
10
10
08
45
35
40
00
55
50
40
10
15
45
MG/L
0
0
0
0
0
0
0
0
0
0
0
•
•
•
•
•
•
•
•
•
•
•
Ob2
035
010K
018
014
082
110
060
224
060
008
MG/L
1.760
2.730
2.600
1.380
1.470
1.900
1.100
2.300
0.900
l.SOO
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
132
147
056
115
027
044
132
044
140
016
020
MG/L P
0
0
0
0
0
0
1
0
0
0
0
.260
.026
.110
.530
.857
.495
.160
.076
.200
.124
.075
MG/L P
0.360
0.180
0.600
0.937
0.575
1.160
0.115
0.250
0.230
0.440
-------
STORET RETRIEVAL DATE 75/08/35
00630
DATE TIME DEPTH N02t>,N03
FROM OF N-TOTAL
TO DAY FEET MG/L
73/07/05 08 00
CP(T>-
73/07/05 16 00
20.000
00625
TOT KJEL
N
MG/L
00610
NH3-N
TOTAL
MG/L
00671
PHOS-DIS
ORTHO
MG/L P
1206DA
29 06 30.0 081
CRESCENT CITY
12105 PUTNAM
D/CRESCENT LAKE
CRESCENT LAKE
11EPALES
4
00665 50051
PHOS-TOT FLO*
RATE
MG/L P INST MGD
PD1206DA
08 00.0
CO HWY MA
2141204
0000 FEET
50053
CONDUIT
FLOW-MOD
MONTHLY
0.134
P001200
DEPTH
0.134
12.500
12.800
0.049
0.053
------- |