Ellen (Hillsborough County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°3'41", Longitude 82°29'48"
Period of record: 15 sampling dates; October 5, 1996 to December 19, 1999
Surface area (Shafer et al. 1986): 53 acres / 21 hectacres
Lake Region (Griffith et al. 1997): Land-O-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Supplemental, unpublished water chemistry data, University of Florida.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 1 month sampled:
|
pH |
7.6 |
Sulfate (mg/L) |
11.3 |
|
Total alkalinity (mg/L as CaCO3) |
40.0 |
Calcium (mg/L) |
18.7 |
|
Conductance (µS/cm @ 25 °C) |
192 |
Magnesium (mg/L) |
1.9 |
|
Color (Pt-Co units) |
20 |
Sodium (mg/L) |
18.7 |
|
Chloride (mg/L) |
26.2 |
Potassium (mg/L) |
2.0 |
|
Silicon (mg/L) |
0.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 15 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
14 |
23 |
33 |
|
Long-term total nitrogen concentrations (µg/L) |
490 |
700 |
810 |
|
Long-term total chlorophyll concentrations (µg/L) |
5.3 |
14.8 |
27.3 |
|
Long-term Secchi depth (ft) |
4.0 |
6.1 |
7.7 |
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 |
|
Oct-10-99 |
19 |
670 |
18.7 |
4.8 |
|
Dec-19-99 |
30 |
770 |
18.0 |
4.0 |
|
|
|
|
|
|
|
1999 Average |
24 |
720 |
18.3 |
4.4 |