Winnemissett (Volusia County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 29°1'27", Longitude 81°15'0"

Period of record: 117 sampling dates; March 8, 1989 to December 28, 1999

Surface area (LAKEWATCH): 184 acres / 74 hectacres     Bathymetric Map

Lake Region (Griffith et al. 1997): Crescent City/DeLand Ridges

Geologic formation (Brooks 1981):

The geology is dominated by coastal sand and shelly silty sand of the preglacial Pleistocene.

Physiographic region (Brooks 1981):

The water body lies in the St. JohnÕs Offset division of the Central Lake District.
 
 

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 6 months sampled:
 
pH
6.4
 Sulfate (mg/L)
44.8
Total alkalinity (mg/L as CaCO3)
3.9
 Calcium (mg/L)
11.6
Conductance (µS/cm @ 25 °C)
173
 Magnesium (mg/L)
11.7
Color (Pt-Co units)
4
 Sodium (mg/L)
9.2
Chloride (mg/L)
17.5
 Potassium (mg/L)
6.1
Silicon (mg/L)
0.2
    

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 117 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
1
5
10
Long-term total nitrogen concentrations (µg/L)
130
280
600
Long-term total chlorophyll concentrations (µg/L)
0.0
1.2
3.3
Long-term Secchi depth (ft)
5.8
14.6
23.5

1999 Florida LAKEWATCH Data

Numbers reported below are monthly averages calculated from 3 stations for total phosphorus (TP, µg/L), total nitrogen (TN, µg/L), chlorophyll (CHL, µg/L) and Secchi depth (SECCHI, ft) during 1999:

Date
TP (µg/L)
TN (µg/L)
CHL (µg/L)
SECCHI (ft
Feb-05-99
7
270
1.3
20.2
Mar-09-99
6
240
1.0
20.0
Apr-07-99
5
250
1.3
18.1
May-10-99
5
340
1.0
14.3
Jun-17-99
5
250
2.0
15.3
Jul-09-99
6
260
1.0
15.9
Sep-08-99
7
300
2.0
16.0
Oct-10-99
7
290
1.0
19.1
Nov-06-99
6
280
1.3
13.8
Dec-28-99
6
280
1.0
17.3
         
1999 Average
6
280
1.3
17.0

 

Winnemissett (Volusia County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 31, 1997

Percent area covered with aquatic vegetation (PAC, %)
52
Percent of lake's volume filled with vegetation (PVI, %)
4
Average emergent plant biomass (kg wet wt/m2)
0.5
Average floating-leaved plant biomass (kg wet wt/m2)
1.1
Average submersed plant biomass (kg wet wt/m2)
1.2
Average width of emergent and floating-leaved zone (ft.)
26
Average lake depth (m)
4

 

Frequency that plant species occur in 10 evenly spaced transects around the lake.

Common Name Plant Species
Frequency (%)
fragrant water-lily Nymphaea odorata
100
lemon bacopa Bacopa caroliniana
100
stonewort Nitella spp.
80
St. John's wort Hypericum spp.
80
banana-lily Nymphoides aquatica
70
red ludwigia Ludwigia repens
70
wax myrtle Myrica cerifera
70
pipewort Eriocaulon spp.
60
bog-moss Mayaca fluviatilis
50
water primrose Ludwigia octovalvis
50
maidencane Panicum hemitomon
50
rush fuirena Fuirena scirpoidea
40
red root Lachnanthes caroliniana
40
pickerelweed Pontederia cordata
30
baby-tears Micranthemum umbrosum
30
cat-tail Typha spp.
30
buttonbush Cephalanthus occidentalis
30
willow Salix spp.
30
torpedograss Panicum repens
30
slender spikerush Eleocharis baldwinii
20
water-pennywort Hydrocotyle umbellata
20
yellow-eyed grass Xyris spp.
20
spatterdock Nuphar luteum
10
southern cutgrass Leersia hexandra
10
bladderwort Utricularia foliosa
10

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