Unity (Lake County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°52'33", Longitude 81°52'42"
Period of record: 115 sampling dates; May 10, 1990 to December 5, 1999
Surface area (Shafer et al. 1986): 104 acres / 42 hectacres
Lake Region (Griffith et al. 1997): Central Valley
Geologic formation (Brooks 1981):
The geology is dominated by deeply weathered clayey sand and granular sand of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Central Lakes division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 2 months sampled:
|
pH |
6.0 |
Sulfate (mg/L) |
6.3 |
|
Total alkalinity (mg/L as CaCO3) |
2.3 |
Calcium (mg/L) |
3.0 |
|
Conductance (µS/cm @ 25 °C) |
83 |
Magnesium (mg/L) |
2.0 |
|
Color (Pt-Co units) |
123 |
Sodium (mg/L) |
9.5 |
|
Chloride (mg/L) |
21.5 |
Potassium (mg/L) |
1.0 |
|
Silicon (mg/L) |
1.3 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 115 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
20 |
36 |
71 |
|
Long-term total nitrogen concentrations (µg/L) |
610 |
890 |
1630 |
|
Long-term total chlorophyll concentrations (µg/L) |
5.0 |
20.9 |
106.0 |
|
Long-term Secchi depth (ft) |
0.8 |
2.6 |
4.0 |
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 |
|
Jan-14-99 |
30 |
840 |
9.3 |
. |
|
Feb-02-99 |
28 |
750 |
8.7 |
3.0 |
|
Mar-07-99 |
28 |
810 |
7.7 |
3.0 |
|
Apr-09-99 |
27 |
650 |
7.3 |
3.0 |
|
May-05-99 |
34 |
690 |
10.7 |
3.0 |
|
Jun-03-99 |
36 |
670 |
8.3 |
3.0 |
|
Jul-04-99 |
41 |
750 |
12.0 |
3.0 |
|
Aug-01-99 |
37 |
770 |
14.3 |
3.5 |
|
Sep-01-99 |
40 |
840 |
15.0 |
3.0 |
|
Oct-03-99 |
29 |
770 |
10.3 |
3.0 |
|
Nov-05-99 |
29 |
790 |
8.3 |
3.0 |
|
Dec-05-99 |
28 |
810 |
5.0 |
4.0 |
|
|
|
|
|
|
|
1999 Average |
32 |
760 |
9.7 |
3.1 |
Unity (Lake County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 7, 1992
|
Percent area covered with aquatic vegetation (PAC, %) |
4 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
1 |
|
Average emergent plant biomass (kg wet wt/m2) |
3.9 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
1.7 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.1 |
|
Average width of emergent and floating-leaved zone (ft.) |
33 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
maidencane |
Panicum hemitomon |
90 |
|
spatterdock |
Nuphar luteum |
80 |
|
elephant-ear |
Colocasia esculenta |
80 |
|
water-pennywort |
Hydrocotyle umbellata |
70 |
|
pickerelweed |
Pontederia cordata |
50 |
|
common salvinia |
Salvinia rotundifolia |
40 |
|
American lotus |
Nelumbo lutea |
40 |
|
water primrose |
Ludwigia octovalvis |
40 |
|
torpedograss |
Panicum repens |
40 |
|
slender spikerush |
Eleocharis baldwinii |
30 |
|
cat-tail |
Typha spp. |
30 |
|
variableleaf pondweed |
Potamogeton diversifolius |
20 |
|
willow |
Salix spp. |
20 |
|
sawgrass |
Cladium jamaicense |
20 |