English (Putnam County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°25'31", Longitude 81°31'57"
Period of record: 29 sampling dates; January 17, 1990 to July 22, 1993
Surface area : No data available.
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 Crescent City-Deland Ridge division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 3 months sampled:
|
pH |
7.8 |
Sulfate (mg/L) |
61.8 |
|
Total alkalinity (mg/L as CaCO3) |
43.8 |
Calcium (mg/L) |
22.5 |
|
Conductance (µS/cm @ 25 °C) |
343 |
Magnesium (mg/L) |
14.0 |
|
Color (Pt-Co units) |
23 |
Sodium (mg/L) |
12.5 |
|
Chloride (mg/L) |
32.5 |
Potassium (mg/L) |
14.5 |
|
Silicon (mg/L) |
0.4 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 29 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
5 |
18 |
24 |
|
Long-term total nitrogen concentrations (µg/L) |
250 |
780 |
1170 |
|
Long-term total chlorophyll concentrations (µg/L) |
3.0 |
12.7 |
29.3 |
|
Long-term Secchi depth (ft) |
3.0 |
4.8 |
9.2 |
Florida LAKEWATCH data were not collected in 1999.
English (Putnam County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 22, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
28 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
4 |
|
Average emergent plant biomass (kg wet wt/m2) |
7.3 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
2.0 |
|
Average submersed plant biomass (kg wet wt/m2) |
9.2 |
|
Average width of emergent and floating-leaved zone (ft.) |
38 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
fragrant water-lily |
Nymphaea odorata |
100 |
|
tapegrass |
Vallisneria americana |
100 |
|
pickerelweed |
Pontederia cordata |
90 |
|
cat-tail |
Typha spp. |
90 |
|
sawgrass |
Cladium jamaicense |
70 |
|
duck-potato |
Sagittaria lancifolia |
50 |
|
wax myrtle |
Myrica cerifera |
40 |
|
buttonbush |
Cephalanthus occidentalis |
40 |
|
water primrose |
Ludwigia octovalvis |
30 |
|
rush fuirena |
Fuirena scirpoidea |
30 |
|
musk-grass |
Chara spp. |
20 |
|
slender spikerush |
Eleocharis baldwinii |
10 |
|
water-pennywort |
Hydrocotyle umbellata |
10 |
|
cone-spur bladderwort |
Utricularia gibba |
10 |
|
salt-bush |
Baccharis spp. |
10 |
|
southern cutgrass |
Leersia hexandra |
10 |