Stemper (Hillsborough County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°8'0", Longitude 82°27'26"
Period of record: 38 sampling dates; December 9, 1996 to December 9, 1999
Surface area (Shafer et al. 1986): 126 acres / 51 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Supplemental, unpublished water chemistry data, University of Florida.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 2 months sampled:
|
pH |
7.3 |
Sulfate (mg/L) |
21.5 |
|
Total alkalinity (mg/L as CaCO3) |
21.5 |
Calcium (mg/L) |
14.0 |
|
Conductance (µS/cm @ 25 °C) |
196 |
Magnesium (mg/L) |
2.8 |
|
Color (Pt-Co units) |
28 |
Sodium (mg/L) |
14.2 |
|
Chloride (mg/L) |
29.7 |
Potassium (mg/L) |
4.0 |
|
Silicon (mg/L) |
0.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 38 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
16 |
22 |
33 |
|
Long-term total nitrogen concentrations (µg/L) |
690 |
970 |
1240 |
|
Long-term total chlorophyll concentrations (µg/L) |
5.7 |
12.2 |
24.3 |
|
Long-term Secchi depth (ft) |
3.0 |
3.9 |
5.4 |
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-20-99 |
16 |
770 |
18.7 |
5.0 |
|
Feb-28-99 |
18 |
840 |
8.3 |
5.0 |
|
Mar-25-99 |
21 |
990 |
6.7 |
4.0 |
|
Apr-26-99 |
21 |
950 |
7.7 |
3.7 |
|
May-28-99 |
21 |
980 |
9.7 |
4.0 |
|
Jun-28-99 |
23 |
1020 |
14.0 |
3.3 |
|
Jul-30-99 |
21 |
950 |
12.3 |
3.5 |
|
Aug-30-99 |
22 |
900 |
11.3 |
3.0 |
|
Sep-30-99 |
20 |
980 |
11.0 |
3.5 |
|
Oct-29-99 |
18 |
900 |
12.3 |
4.2 |
|
Nov-19-99 |
19 |
960 |
10.7 |
3.8 |
|
Dec-09-99 |
20 |
990 |
12.3 |
3.5 |
|
|
|
|
|
|
|
1999 Average |
20 |
940 |
11.2 |
3.9 |