Virginia (Hillsborough County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°9'42", Longitude 82°29'21"
Period of record: 24 sampling dates; January 20, 1998 to December 17, 1999
Surface area (Shafer et al. 1986): 21 acres / 9 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Supplemental, unpublished water chemistry data, University of Florida.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 |
7.0 |
Sulfate (mg/L) |
17.8 |
|
Total alkalinity (mg/L as CaCO3) |
13.1 |
Calcium (mg/L) |
10.3 |
|
Conductance (µS/cm @ 25 °C) |
187 |
Magnesium (mg/L) |
2.9 |
|
Color (Pt-Co units) |
50 |
Sodium (mg/L) |
17.0 |
|
Chloride (mg/L) |
38.5 |
Potassium (mg/L) |
3.8 |
|
Silicon (mg/L) |
0.5 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 24 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
32 |
40 |
57 |
|
Long-term total nitrogen concentrations (µg/L) |
820 |
1230 |
1650 |
|
Long-term total chlorophyll concentrations (µg/L) |
14.3 |
36.0 |
60.3 |
|
Long-term Secchi depth (ft) |
2.9 |
3.6 |
5.2 |
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-18-99 |
37 |
990 |
32.0 |
3.6 |
|
Feb-24-99 |
40 |
1150 |
38.7 |
3.4 |
|
Mar-20-99 |
44 |
1290 |
28.7 |
3.4 |
|
Apr-16-99 |
50 |
1420 |
50.3 |
3.1 |
|
May-19-99 |
44 |
1290 |
35.3 |
3.6 |
|
Jun-20-99 |
42 |
1420 |
37.3 |
3.4 |
|
Jul-19-99 |
41 |
1580 |
47.0 |
2.9 |
|
Aug-20-99 |
41 |
1650 |
51.0 |
2.9 |
|
Sep-19-99 |
40 |
1500 |
60.3 |
2.9 |
|
Oct-20-99 |
36 |
1450 |
46.7 |
2.9 |
|
Nov-24-99 |
37 |
1460 |
42.7 |
3.2 |
|
Dec-17-99 |
40 |
1440 |
43.7 |
3.2 |
|
|
|
|
|
|
|
1999 Average |
41 |
1390 |
42.8 |
3.2 |