Louisa (Lake County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°28'45", Longitude 81°44'14"
Period of record: 51 sampling dates; June 1, 1990 to December 5, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Clermont Uplands
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 Groveland Karst 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Supplemental, unpublished water chemistry data, University of Florida.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 |
5.1 |
Sulfate (mg/L) |
5.1 |
|
Total alkalinity (mg/L as CaCO3) |
1.2 |
Calcium (mg/L) |
3.7 |
|
Conductance (µS/cm @ 25 °C) |
83 |
Magnesium (mg/L) |
6.4 |
|
Color (Pt-Co units) |
225 |
Sodium (mg/L) |
7.7 |
|
Chloride (mg/L) |
18.2 |
Potassium (mg/L) |
1.3 |
|
Silicon (mg/L) |
1.1 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 51 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
10 |
15 |
24 |
|
Long-term total nitrogen concentrations (µg/L) |
660 |
860 |
1100 |
|
Long-term total chlorophyll concentrations (µg/L) |
3.0 |
7.6 |
21.0 |
|
Long-term Secchi depth (ft) |
1.9 |
2.9 |
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 |
|
Mar-30-99 |
15 |
990 |
4.0 |
2.2 |
|
May-11-99 |
17 |
1070 |
5.3 |
2.5 |
|
Jun-01-99 |
18 |
1020 |
4.3 |
1.9 |
|
Jul-05-99 |
15 |
820 |
8.3 |
2.5 |
|
Aug-03-99 |
17 |
900 |
8.3 |
2.3 |
|
Sep-07-99 |
17 |
810 |
14.0 |
2.6 |
|
Oct-05-99 |
17 |
750 |
11.3 |
2.9 |
|
Nov-02-99 |
13 |
690 |
9.0 |
2.9 |
|
Dec-05-99 |
15 |
720 |
7.0 |
3.1 |
|
|
|
|
|
|
|
1999 Average |
16 |
860 |
8.0 |
2.6 |
Louisa (Lake County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on June 10, 1992
|
Percent area covered with aquatic vegetation (PAC, %) |
6 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
1 |
|
Average emergent plant biomass (kg wet wt/m2) |
2.3 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.0 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.0 |
|
Average width of emergent and floating-leaved zone (ft.) |
60 |
|
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 |
100 |
|
bald cypress |
Taxodium distichum |
100 |
|
buttonbush |
Cephalanthus occidentalis |
90 |
|
water primrose |
Ludwigia octovalvis |
50 |
|
torpedograss |
Panicum repens |
50 |
|
rush fuirena |
Fuirena scirpoidea |
30 |
|
jointed flat sedge |
Cyperus haspan |
20 |
|
pickerelweed |
Pontederia cordata |
10 |
|
cat-tail |
Typha spp. |
10 |
|
water-pennywort |
Hydrocotyle umbellata |
10 |
|
willow |
Salix spp. |
10 |
|
red root |
Lachnanthes caroliniana |
10 |
|
yellow-eyed grass |
Xyris spp. |
10 |
|
knot grass |
Paspalum distichum |
10 |
|
rush spp. |
Juncus dichotomus |
10 |
|
bog button |
Lachnocaulon spp. |
10 |