U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT ON
WILLIAMS POND
SUSSEX COUNTY
DELAWARE
EPA REGION III
WORKING PAPER No, 242
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
VTGPO 697-032
-------
REPORT ON
WILLIAMS POND
SUSSEX COUNTY
DELAWARE
EPA REGION III
WORKING PAPER No, 242
WITH THE COOPERATION OF THE
DELAWARE DEPARTMENT OF NATURAL RESOURCES
AND ENVIRONMENTAL CONTROL AND THE
DELAWARE NATIONAL GUARD
JUNE 1975 673
-------
REPORT ON WILLIAMS POND
SUSSEX COUNTY, DELAWARE, EPA REGION III
by
National Eutrophication Survey
Water and Land Monitoring Branch
Monitoring Applications Laboratory
National Environmental Research Center
Las Vegas, Nevada
and
Eutrophication Survey Branch
Pacific Northwest Environmental Research Laboratory
National Environmental Research Center
Corvallis, Oregon
Working Paper No. 242
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
June 1975
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CONTENTS
Page
Foreword i i
List of Delaware Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 5
IV. Nutrient Loadings 10
V. Literature Reviewed 14
VI. Appendices 15
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11
FOREWORD
The National Eutrophication Survey was initiated in 1972
in response to an Administration commitment to investigate the
nationwide 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 nonpoint 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
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
-------
Ill
planning [§303(e)], water quality criteria/standards review
[§303(c)], clean lakes [§314(a,b)], and water quality monitoring
[§106 and §305(b)] activities mandated by the Federal Water
Pollution Control Act Amendments of 1972.
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
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 EPA
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 Delaware Department of
Natural Resources and Environmental Control for professional
involvement and to the Delaware National Guard for conducting
the tributary sampling phase of the Survey.
Mr. N. C. Vasuki, Director, Division of Water Pollution
Control, Department of Natural Resources and Environmental
Control, provided invaluable lake documentation and counsel
during the course of the Survey.
Major General Clarence E. Atkinson, the Adjutant General
of Delaware, and Project Officer Colonel Donald S. Robinson,
who directed the volunteer efforts of the Delaware National
Guardsmen, are also gratefully acknowledged for their
assistance to the Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF DELAWARE.
LAKE NAME
Kill en Pond
Moores Lake
Noxontown Pond
Silver Lake
Williams Pond
Trussum Pond
COUNTY
Kent
Kent
New Castle
New Castle
Sussex
Sussex
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7S-39
75'37
75'35'
38'44 H
WILLIAMS POND
Tributary Sampling Site
X Lake Sampling Site
i ?Km.
Mi
Map Location
38'42'
lanticoke
Acres
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WILLIAMS POND
STORE! NO. 1009
I. CONCLUSIONS
A. Trophic Condition:
Williams Pond is considered eutrophic based upon
field observations and analysis of Survey data. Chlorophyll
a^ levels range from a low of 7.4 micrograms/liter in the
spring to a high of 61.1 micrograms/liter in the summer.
Algal blooms and floating higher aquatic plants were
observed during summer and fall sampling. Water clarity
was poor, with mean Secchi disc visibility of 128.7 cm.
Pollution-tolerant genera were predominant among the
phytoplankton identified.
B. Rate-Limiting Nutrient:
Algal assay results indicate that Williams Pond was
limited by available phosphorus levels at the time of
assay sample collection. The ratios of available nitrogen
to orthophosphorus in sampled waters substantiates phos-
phorus limitation for the spring and fall sampling dates.
Nitrogen to phosphorus ratios suggest a tendency to
nitrogen limitation for the summer sampling data.
-------
C. Nutrient Controllability:
The phosphorus loading rate for Williams Pond of
6.53 g/m^/yr exceeds the rate proposed by Vollenweider
(in press) as "dangerous" or eutrophic by three times,
and the "permissible" or oligotrophic rate by six
times. However, Vollenweider's model probably does
not apply to water bodies with short hydraulic retention
times, and the mean hydraulic retention time of Williams
Pond is only 3 days.
There are no known point sources contributing to
Williams Pond. Measured tributaries account for 95.7%
of the total nonpoint source phosphorus load, and the
ungaged drainage areas were estimated to contribute 3.9%.
Of the tributaries sampled, Clear Brook shows a
lower nitrogen to phosphorus ratio (8:1) than would be
expected from natural runoff. Tributaries with nitrogen
to phosphorus ratios less than 14:1 are suspected of being
impacted by a point source that was not accounted for in
this survey, either from Hearns Pond or the town of Cannon.
Determination of surrounding land uses and unknown
sources contributing loading is necessary before recom-
mendations for lake improvement can be proposed.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are Itemized
below. The pond surface area was provided by the State of
Delaware; mean depth was estimated based on survey data;
tributary f]ow data were provided by the Delaware 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 the 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: 0.34 km2.
2. Mean depth: 1.2 meters.
3. Maximum depth: 2.1 meters.
4. Volume: 0.408 x 106 m3.
5. Mean hydraulic retention time: 3 days.
-------
B. Tributary and Outlet (see Appendix C for flow data):
1. Tributaries -
Drainage Mean flow
Name area (km2)_ (m^/sec)
A(2) Clear Brook 39.6 1.17
B(l) Herring Run 10.4 0.31
C(l) William H. Newton Ditch 5.3 0.01
Minor tributaries &
immediate drainage - 4.3 0.04
Totals 59.6 1.53
2. Outlet - A(l) Clear Creek 59.8 1.53
C. Precipitation:
1. Year of sampling: 105.0 centimeters.
2. Mean annual: 109.4 centimeters.
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III. LAKE WATER QUALITY SUMMARY
Williams Pond was sampled three times during the open-
water season of 1973 by means of a pontoon-equipped Kuey
helicopter. Each time, samples for physical and chemical
parameters were collected from two stations on the pond 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 phyto-
plankton identification and enumeration. During the first
visit, 18.9-liter depth-integrated samples were composited
for algal assays. Maximum depths sampled were 1.8 meters
at Station 1 and 1.2 meters at Station 2. 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 III A for waters at the
surface and at the maximum depth for each site. Results
of the phytoplankton counts and chlorophyll ^determi-
nations are included in III B. Results of the limiting
nutrient study are presented in III C.
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A. PHYSICAL AND CHEMICAL CHARACTERISTICS:
( 4/10/73 )
PARAMETER
MAX
S««» = 2 DEPTH
RANGE
RANGE MEDIAN (METERS)
N*
( 7/20/73 )
MAX
S»«* = 2 DEPTH
RANGE
RANGE MEDIAN (METERS)
N«
( 9/28/73 )
MAX
S*»« = 2 DEPTH
RANGE
RANGE MEDIAN (METERS)
TEMPERATURE (DEG CENT)
0.-1.5 M DEPTH
MAX DEPTH"
DISSOLVED OXYGEN
0.-1.5 M DEPTH
MAX DEPTH**
3
2
(MG/L)
1
2
CONDUCTIVITY (UMHOS)
0.-1.5 M DEPTH 3
MAX DEPTH** 2
PH (STANDARD UNITS)
0.-1.5 M DEPTH 3
MAX DEPTH** 2
TOTAL ALKALINITY
0.-1.5 M DEPTH
MAX DEPTH**
TOTAL P (MG/L)
0.-I.5 M DEPTH
MAX DEPTH**
DISSOLVED ORTHO P
0.-1.5 M DEPTH
MAX DEPTH**
N02*N03 (MG/L)
0.-1.5 M DEPTH
MAX DEPTH**
AMMONIA
0.-1.5 M DEPTH
MAX DEPTH**
KJELDAHL N (MG/L)
0.-1.5 M DEPTH
MAX DEPTH**
(MG/L)
3
2
3
2
(MG/L)
3
2
3
2
3
2
3
2
13.8- 14.2
13.8- 14.1
10.0- 10.0
10.0- 10.1
9B.- 102.
98.- 101.
8.1- 8.5
8.1- 8.5
12.- 15.
12.- 12.
0.037-0.038
0.034-0.037
0.008-0.011
0.008-0.008
2.200-2.500
2.200-2.600
0.040-0.060
0.040-0.050
0.600-0.700
0.600-0.700
13.8
13.9
10.0
10.0
98.
100.
8.5
8.3
12.
12.
0.037
0.035
0.008
0.008
2.200
2.400
0.050
0.045
0.700
0.650
0.0-
1.2-
1.2-
1.2-
0.0-
1.2-
0.0-
1.2-
0.0-
1.2-
0.0-
1.2-
0.0-
1.2-
0.0-
1.2-
0.0-
1.2-
0.0-
1.2-
1.2
1.8
1.2
1.8
1.2
1.8
1.2
1.8
1.2
1.8
1.2
1.8
1.2
1.8
1.2
1.8
1.2
1.8
1.2
1.8
3
2
2
2
3
2
3
2
3
2
3
2
3
2
3
2
3
2
3
2
27.2- 28.6
27.2- 28.6
6.2- 12.1
6.2- 12.1
108.- 112.
108.- 111.
7.3- 9.5
7.3- 9.5
22.- 25.
22.- 24.
0.086-0.100
0.093-0.100
0.010-0.012
0.010-0.012
0.060-0.100
0.060-0.080
0.040-0.090
0.040-0.090
1.100-1.100
1.100-1.100
28.3
27.9
9.1
9.1
111.
110.
8.5
8.4
24.
23.
0.093
0.096
0.010
0.011
0.080
0.070
0.050
0.065
1.100
1.100
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-
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
3
2
2
1
3
2
2
1
2
1
2
1
2
1
2
1
2
I
2
1
21.0- 22.2
21.0- 22.2
8.6- 10.0
8.6- 8.6
86.- 86.
87.- 88.
7.7- 7.7
7.7- 7.7
18.- 19.
19.- 19.
0.042-0.044
0.044-0.044
0.012-0.014
0.012-0.012
1.700-1.950
1.700-1.700
0.040-0.060
0.040-0.040
0.800-0.800
0.800-0.800
22.0
21.6
9.3
8.6
87.
88.
7.7
7.7
19.
19.
0.043
0.044
0.013
0.012
1.825
1.700
0.050
0.040
0.800
0.800
0.0- 1.5
0.0- 1.5
0.0- 0.0
0.0- 0.0
0.0- 1.5
0.0- 1.5
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
0.0- 0.0
0.0- 0.0
0.0- 0.0
0.0- 0.0
SECCHI DISC (METERS)
1.0- 1.1
1.0
0.9- 1.1 1.0
1.8- 1.8
1.8
* N = NO. OF SAMPLES
** MAXIMUM DEPTH SAMPLED AT EACH SITE
*«» S = NO. OF SITES SAMPLED ON THIS DATE
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B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
04/10/73
Dominant
Genera
1.
2.
3.
4.
5.
Flagellates
Melosira
Asterionella
Navicula
Dictyosphaerium
Other genera
Algal
Units
per ml
4,727
1,504
1,504
129
129
430
07/20/73
09/28/73
Total
1. Flagellates
2. Dactylococcopsis
3. Chlamydomonas
4. Scenedesmus
5. Coelastrum
Other genera
Total
1. Flagellates
2. Oscillatoria
3. Melosira
4. Blue-green filament
5. Microcystis
Other genera
Total
8,423
8,060
7,233
6,614
5,476
1,550
4.952
33,885
1,484
812
504
476
476
2.268
6,020
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8
2. Chlorophyll a_ - '
Sampling Station Chlorophyll a
Date Number (micrograms/Titer)
04/10/73 1 13.5
2 7.4
07/20/73 1 61.1
2 54.9
09/28/73 1 20.9
2 22.8
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
Ortho P Inorganic N Maximum yield
Spike (mg/1) Cone, (mg/1) Cone, (mg/1) (mg/l-dry wt.)
Control 0.012 2.24 0.5
0.05 P 0.062 2.24 24.6
0.05 P + 1.0 N 0.062 3.24 28.4
1.00 N 0.012 3.24 0.8
2. Discussion -
The control yield of the assay alga, Selenastrum
capricornutum, indicates that the potential primary
productivity of Williams Pond was moderate at the time
the sample was collected. Increasing yields with the
addition of phosphorus and the lack of response to the
addition of nitrogen indicate that this pond is phos-
phorus limited. Maximum growth response was achieved
with the simultaneous addition of nitrogen and phosphorus.
-------
The ratios of the mean total available inorganic
nitrogen to orthophosphorus for the spring and fall
samplings were 269:1 and 144:1, respectively,
indicating phosphorus limitation at those times.
The summer nitrogen to phosphorus ratio was 13:1,
suggesting a tendency for the lake to be nitrogen
limited at that time.
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10
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Delaware
National Guard 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 March when two samples were
collected. Sampling was begun in April 1973 and was completed
in March 1974.
Through an interagency agreement, stream flow estimates
for the year of sampling and a "normalized" or average year
were provided by the Delaware District Office 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 the 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
immediate drainage" ("ZZ" of USGS) were estimated by using the
mean annual concentrations in Clear Brook and William H. Newton
Ditch at Stations A(2) and C(l) and mean annual ZZ flow.
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11
A. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
A(2) Clear Brook 1,760 79.3
B(l) Herring Run 345 15.5
C(l) William H. Newton Ditch 20 0.9
b. Minor tributaries & immediate
drainage (nonpoint load) - 85 3.9
c. Known municipal STP's - None
d. Septic tanks* - 5 0.2
e. Known industrial - None
f. Direct precipitation** - 5 0.2
Total 2,220 100.0
2. Outputs - A(l) Clear Creek 2,155
3. Net annual P accumulation - 65
*Estimate based on 11 lakeshore residences.
**Estimated (see NES Working Paper No. 175).
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12
B. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
% of
Source kg N/yr total
a. Tributaries (nonpoint load) -
A(2) Clear Brook 106,855 65.9
B(l) Herring Run 52,070 32.1
C(l) William H. Newton Ditch 340 0.2
b. Minor tributaries & immediate
drainage (nonpoint load) - 2,570 1.6
c. Known municipal STP's - None
d. Septic tanks* - 5 <0.1
e. Known industrial - None
. f. Direct precipitation** - 370 0.2
Total 162,210 100.0
2. Output - A(l) Clear Creek 129,955
3. Net annual N accumulation - 32,255
*Estimate based on 11 lakeshore residences.
**Estimated (see NES Working Paper No. 175).
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13
C. Mean Annual Nonpoint Nutrient Export by Subdralnage Area:
Tributary kg P/km2/yr kg N/km2/yr
A(2) Clear Brook 44 2,698
B(l) Herring Run 33 5,007
C(l) William H. Newton Ditch 4 64
D. Yearly Loading Rates:
In the following table, the existing phosphorus
loading rates are compared to those proposed by
Vollenweider (in press). Essentially, his "dangerous"
rate is the rate at which the receiving waters would
become eutrophic or remain eutrophic; his "permissible"
rate is that which would result in the receiving water
remaining oligotrophic or becoming oligotrophic if
morphometry permitted. A mesotrophic rate would be
considered one between "dangerous" and "permissible."
Total Yearly
Phosphorus Loading Rate
(grams/m2/year)
Estimated loading rate for Williams Pond 6.53
Vollenweider's "dangerous" or eutrophic rate 2.24
Vollenweider's "permissible" or oligotrophic rate 1.12
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LITERATURE REVIEWED
U.S. Environmental Protection Agency. 1975. "National
Eutrophication Survey Methods 1973-1976." Working
Paper No. 175. NERC, Las Vegas, Nevada, and PNERL,
Corvallis, Oregon.
Vollenweider, Richard A. (in press). "Input-Output
Models." Schweiz. Z. Hydro!.
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15
VI. APPENDICES
APPENDIX A
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
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
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APPENDIX B
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1973
STATE OF DELAWARE
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
1002 KILLEN POND
1005 MOORES LAKE
1007 NOXONTOWN POND
1008 SILVER LAKE
1009 WILLIAMS POND.
1010 TRUSSUM POND
MEDIAN
TOTAL P
0.170
0.245
0.160
0.227
0.042
0.038
MEDIAN
INORG N
1.610
2.400
0.530
4.750
2.010
1.280
500-
MEAN SEC
479.333
472.667
478.833
465.667
449.333
464.000
MEAN
CHLORA
116.200
81.267
37.600
26.700
30.100
5.100
15-
MIN DO
12.000
4.700
10.400
13.000
8.800
5.800
MEDI,
OISS ORTI
0.042
0.071
0.016
0.096
0.010
0.011
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PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
1002 KILLEN POND
1005 MOORES LAKE
1007 NOXONTOWN POND
1008 SILVER LAKE
1009 WILLIAMS POND
1010 TRUSSUM POND
MEDIAN
TOTAL P
40 (
0 (
60 (
20 (
80 (
100 (
2)
0)
3)
1)
4)
5)
MEDIAN
INORG N
60 (
20 (
100 (
0 (
40 (
80 (
3)
1)
5)
0)
2)
4)
500-
MEAN SEC
0 (
40 (
20 (
60 (
100 (
80 (
0)
2)
1)
3)
5)
4)
MEAN
CHLORA
0 (
20 (
40 (
80 (
60 (
100 (
0)
1)
2)
4)
3)
5)
15-
MIN
20 (
100 (
40 (
0 (
60 (
80 (
DO
1)
5)
2)
0)
3)
4)
MEDIAN
DISS ORTHO
40 (
20 (
60 (
0 (
100 (
80 (
2)
1)
3)
0)
5)
4)
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APPENDIX C
TRIBUTARY FLOW DATA
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TRIBUTARY FLOW INFORMATION FOR DELAWARE
10/20/75
LAKE CODE 1009
WILLIAMS POND
TOTAL DRAINAGE AREA OF LAKE(SO MI) 33.10
SUB-DRAINAGE
TRIBUTARY AREA(59 MI) JAN FEB MAR
NORMALIZED FLOWS(CFS)
APR MAY JUN JUL AUG
SEP
OCT
NOV
DEC
MEAN
1009A1
1009A2
1009B1
1009C1
1009ZZ
23.10
15.29
4.01
2.03
1.77
68.00
52.00
14.00
0.40
1.60
78.00
59.00
16.00
0.40
2.60
92.00
71.00
19. «0
0.60
1.40
73.00
56.00
15.00
0.40
1.60
54.00
41.00
11.00
0.30
1.70
42.00
32.00
8.70
0.20
1.10
32.00
24.00
6.50
0.20
1.30
50.00
38.00
10.00
0.30
1.70
30.00
23.00
6.20
0.20
0.60
35.00
26.00
7.20
0.30
1.60
43.00
32.00
8.90
0.20
1.90
54.00
41.00
11.00
0.30
1.70
54.13
41.16
11.10
0.31
1.56
TOTAL DRAINAGE AREA OF LAKE * 23.10
SUM OF SUB-DRAINAGE AREAS = 23.10
MEAN MONTHLY FLOWS AND DAILY FLOWS(CFS)
TRIBUTARY MONTH YEAR
1009A1
MEAN FLOW DAY
FLOW DAY
1009A2
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
73
73
73
73
73
73
73
73
73
74
74
74
73
73
73
73
73
73
73
73
73
74
74
74
80.00
59.00
36.00
28.50
73.00
45.00
34.00
28.00
69.00
85.00
65.00
63.00
62.00
44.00
28.00
22.00
56.00
35.00
26.00
22.00
53.00
65.00
50.00
48.00
28
20
23
22
18
23
28
10
1
5
5
9
28
20
23
22
18
23
28
10
1
5
5
9
101.00
45.00
48.00
52.00
27.00
41.00
25.00
36.00
23.00
188.00
56.00
43.00
78.00
35.00
36.00
40.00
21.00
31.00
19.00
28.00
17.00
144.00
43.00
32.00
23
25
23
25
SUMMARY
TOTAL FLOW IN * 651.00
TOTAL FLOW OUT = 651.00
FLOW DAY
FLOW
72.00
59.00
55.00
44.00
-------
TRIbUTAKY FLO* INFORMATION FOR DELAWARE
10/20/75
LAKE CODE 1009
WILLIAMS POND
MEAN MONTHLY FLOWS AND DAILY FLOWSJCFS)
TRIbOTARY MONTH YtAk .lEAN FLOW DAY
1009B1
1G09C1
1009ZZ
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
a
9
10
11
12
1
2
3
4
5
6
7
a
9
10
11
12
1
2
3
73
73
73
73
73
73
73
73
73
74
7«+
74
73
73
73
73
73
73
73
73
73
74
7*»
74
73
73
73
73
73
73
73
73
73
74
74
74
16.00
12.00
7.40
5.80
15.00
9.40
7.10
S.80
14. Ou
18.30
13.00
13.00
0.0
0.0
0.0
0.0
0.0
0.20
0.20
0.10
0.40
0.50
0.40
0.30
1.60
2.70
0.40
0.60
1.60
0.40
0.70
0.10
1.60
1.50
1.60
1.70
2ft
20
23
22
18
23
28
10
1
5
5
9
28
20
23
22
18
23
28
10
1
b
5
9
28
20
23
22
18
23
28
10
1
5
5
y
FLOW
21.00
9.80
11.00
5.50
8.40
5.10
7.50
4.80
39.00
12.00
8.90
0.60
0.20
0.20
0.30
0.10
U.20
0.10
0.20
0.10
1.10
0.30
0.20
1.40
0.40
2.00
0.80
0.40
1.40
0.80
0.30
1.10
3.90
0.70
1.90
DAY
23
25
23
25
23
25
FLOW DAY
FLOW
15.00
12.00
0.40
0.30
1.60
2.70
-------
APPENDIX D
PHYSICAL AND CHEMICAL DATA
-------
STORET RETRIEVAL DATE 75/10/16
100901
38 38 38.0 075 36 17.0
WILLIAMS POND
10 DELAWARE
DATE
FROM
TO
73/04/10
73/07/20
73/09/28
TIME DEPTH
or
DAY FEET
15 05 0000
15 05 0006
14 35 0000
14 35 0004
14 45 0000
14 45 0005
00010
WATER
TEMP
CENT
14.2
14.1
28.3
27.2
22.0
21.0
00300
DO
MG/L
10.1
6.2
10.0
00077
TRANSP a
SECCHI FIELD
INCHES Ml
40
42
72
11EPALES
3
2111202
0008 FEET
DEPTH
94
TVY
MHO
102
101
112
111
86
87
00400
PH
SU
8.50
8.50
8.50
7.30
7.70
00410
T ALK
CAC03
MG/L
15
12
25
24
18
00610
NH3-N
TOTAL
MG/L
0.040
0.040
0.050
0.090
0.060
0062S
TOT KJEL
N
MG/L
0.700
0.600
1.100
1.100
0.800
00630
N021N03
N-TOTAL
MG/L
2.500
2.600
0.100
0.080
1.950
00671
PHOS-DIS
ORTMO
MG/L P
0.008
0.008
0.010
0.012
0.014
DATE
FROM
TO
73/04/10
73/07/20
73/09/28
TIME DEPTH
OF
DAY FEET
15 05 0000
15 05 0006
14 35 0000
14 35 0004
14 45 0000
00665
PHOS-TOT
MG/L P
0.037
0.034
0.086
0.093
0.042
32217
CHLRPHYL
A
UG/L
13.5
61.1
20.9
-------
STORE! RETRIEVAL DATE 75/10/16
100902
38 39 03.0 075 35 36.0
WILLIAMS POND
10 DELAWARE
00010
DATE TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
73/04/10 15 20 0000 13.8
15 20 0004 13.8
73/07/20 14 50 0000 28.6
73/09/28 15 00 0000 22.2
00300 00077
DO TRANSP C
SECCHI FIELD
M6/L INCHES MI
10.0
12.1
8.6
42
36
72
11EPALES
3
2111202
0006 FEET
DEPTH
94
TVY
MHO
98
98
108
88
00400
PH
SU
8.50
8.10
9.50
7.70
00410
T ALK
CAC03
MG/L
12
12
22
19
00610
NH3-N
TOTAL
MG/L
0.060
0.050
0.040
0.040
00625
TOT KJCL
N
MG/L
0.600
0.700
1.100
o.aoo
•063*
NO21N03
N-TOTAL
MG/L
2.200
2.200
0.060
1.700
00671
PHOS-DIS
ORTHO
MG/L P
0.011
0.008
0.010
0.012
00665 32217
DATE TIME DEPTH PHOS-TOT CHLRPHYL
FROM OF A
TO DAY FEET MG/L P UG/L
73/04/10 15 20 0000 0.038 7.4
15 20 0004 0.037
73/07/20 14 50 0000 0.100 54.9
73/09/28 15 00 0000 0.044 22.8
-------
APPENDIX E
TRIBUTARY DATA
-------
STORET RETRIEVAL DATE 75/10/16
1009A2
38 41 00.0 075 35 30.0
CLEAR BROOK
10 7.5 SEAFORD EAST
I/WILLIAMS POND
ST HWY 13A BRDG 2 MI N OF SEAFORD
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/04/28
73/05/20
73/06/23
73/07/22
73/08/l'8
73/09/23
73/10/28
73/11/10
73/12/01
74/01/05
74/02/05
74/03/09
74/03/25
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
10
09
08
08
09
12
09
09
09
09
13
10
30
12
30
15
30
50
30
50
25
45
00
30
MG/L
2
1
0
0
2
1
1
1
3
4
•
»
•
•
•
•
•
*
•
•
100
450
410
160
040
900
700
920
400
100
3.080
2
•
900
MG/L
0.
1.
0.
1.
0.
0.
1.
0.
0.
0.
0.
0.
0.
350
050
980
300
940
920
850
400
300
500
100K
700
600
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.036
0.078
0.065
0.273
0.120
0.067
0.095
0.080
0.056
0.076
0.055
0.030
0.035
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
P
010
012
019
010
017
010
007
013
012
036
007
010
015
MG/L P
0.040
0.037
0.070
0.070
0.085
0.064
0.030
0.020
0.040
0.070
0.013
0.030
0.060
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 75/10/16
1009B1
38 39 30.0 075 36 00.0
HERRING BUN
10 7.5 SEAFORD EAST
T/WILLIAMS POND
ST HMY 13A BRDG 0.75 MI N OF SEAFORD
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
73/04/28
73/05/20
73/06/23
73/07/22
73/08/18
73/09/23
73/10/28
73/11/10
73/12/01
74/01/05
74/02/05
74/03/09
74/03/25
TIME DEPTH
OF
DAY FEET
11 10
09 07
09 00
08 35
10 05
13 20
09 45
09 30
09 15
09 40
12 45
11 30
00630
N02&N03
N-TOTAL
MG/L
4.600
4.650
3.800
3.800
4.900
4.700
4.400
4.200
5.500
5.700
5.200
5.500
00625
TOT KJEL
N
MG/L
0.280
0.660
0.130
1.050
0.500
0.335
0.100K
0.850
0.100K
0.200
0.200
0.400
0.500
00610
NH3-N
TOTAL
MG/L
0.070
0.095
0.070
0.072
0.048
0.050
0.054
0.060
0.034
0.044
0.025
0.025
0.050
00671
PHOS-DIS
ORTHO
MG/L P
0.015
0.012
0.023
0.026
0.021
0.017
0.026
0.013
0.012
0.012
0.005
0.010
0.010
00665
PHOS-TOT
MG/L P
0.030
0.025
0.030
0.115
0.040
0.025
0.035
0.045
0.015
0.015
0.007
0.050
0.025
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/10/16
1009C1
38 40 30.0 @75 34 30.0
WILLIAM H NEWTON DITCH
10 7.5 SEAFORD EAST
T/WILLIAMS POND
BRDG 1 MI te) OF MIDDLEFORD
11EPALES 2111204
4 0000 FEET
DEPTH
DATE
FROM
TO
73/04/28
73/65/20
73/08/18
73/09/23
73/12/01
74/01/05
74/02/05
74/03/09
74/03/25
TIME DEPTH
OF
DAY FEET
10 45
09 20
09 40
13 00
09 30
09 50
13 30
11 00
©©630
N02&N03
N-TOTAL
MG/L
0.770
0»575
00086
0«©68
1.000
1.200
0.020
0.116
00625
TOT KJEL
N
MG/L
1.050
1.260
0e 64®
20200
0.810
0.400
0.400
0.700
0.400
©0610
NH3-N
TOTAL
MG/L
0.240
Oe360
0.056
0.240
Oo040
Oe036
0,015
0.015
0.030
00671
PHOS-DIS
ORTHO
MG/L P
Oo027
0.046
0.027
Oo054
0 = 068
0.020
0.015
0.010
0.005
00665
PHOS-TOT
MG/L P
0.065
Ool20
0 o070
OoU5
Oo240
0»040
OoOI5
o006o
0.020
------- |