Dead Lady (Hillsborough County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°9'13", Longitude 82°34'30"
Period of record: 104 sampling dates; June 16, 1991 to December 15, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Keystone Lakes
Geologic formation (Brooks 1981):
The geology is dominated by argillaceous to sandy impure limestone of the Tampa Formation.
Physiographic region (Brooks 1981):
The water body lies in the Land-O-Lakes subdivision of the Tampa Plain division of the Ocala Uplift District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 2 months sampled:
|
pH |
6.9 |
Sulfate (mg/L) |
13.6 |
|
Total alkalinity (mg/L as CaCO3) |
15.0 |
Calcium (mg/L) |
7.5 |
|
Conductance (µS/cm @ 25 °C) |
128 |
Magnesium (mg/L) |
3.0 |
|
Color (Pt-Co units) |
76 |
Sodium (mg/L) |
9.1 |
|
Chloride (mg/L) |
21.4 |
Potassium (mg/L) |
2.3 |
|
Silicon (mg/L) |
1.4 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 104 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
13 |
39 |
114 |
|
Long-term total nitrogen concentrations (µg/L) |
600 |
1010 |
2160 |
|
Long-term total chlorophyll concentrations (µg/L) |
3.0 |
31.4 |
223.7 |
|
Long-term Secchi depth (ft) |
2.3 |
5.6 |
8.8 |
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-17-99 |
34 |
860 |
9.7 |
6.2 |
|
Feb-20-99 |
38 |
840 |
13.7 |
7.2 |
|
Mar-20-99 |
36 |
910 |
13.0 |
5.9 |
|
Apr-11-99 |
27 |
810 |
4.7 |
7.0 |
|
May-16-99 |
21 |
720 |
3.0 |
7.5 |
|
Jun-20-99 |
28 |
800 |
10.7 |
7.5 |
|
Jul-24-99 |
18 |
600 |
11.3 |
5.8 |
|
Aug-15-99 |
13 |
640 |
8.3 |
7.8 |
|
Sep-12-99 |
22 |
710 |
15.3 |
7.3 |
|
Oct-17-99 |
31 |
870 |
54.0 |
7.3 |
|
Nov-16-99 |
27 |
800 |
26.7 |
8.8 |
|
Dec-15-99 |
21 |
760 |
11.7 |
8.5 |
|
|
|
|
|
|
|
1999 Average |
26 |
780 |
15.2 |
7.2 |
Dead Lady (Hillsborough County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 28, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
20 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
9 |
|
Average emergent plant biomass (kg wet wt/m2) |
1.1 |
|
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.) |
5 |
|
Average lake depth (m) |
2 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
common salvinia |
Salvinia rotundifolia |
90 |
|
water primrose |
Ludwigia octovalvis |
80 |
|
Baldwin flat sedge |
Cyperus globulosus |
80 |
|
bald cypress |
Taxodium distichum |
70 |
|
buttonbush |
Cephalanthus occidentalis |
60 |
|
wax myrtle |
Myrica cerifera |
40 |
|
maidencane |
Panicum hemitomon |
40 |
|
southern cutgrass |
Leersia hexandra |
20 |
|
slender spikerush |
Eleocharis baldwinii |
10 |
|
pickerelweed |
Pontederia cordata |
10 |
|
water spider orchid |
Habenaria repens |
10 |