Chapman (Hillsborough County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°6'18", Longitude 82°27'48"
Period of record: 86 sampling dates; November 4, 1992 to December 4, 1999
Surface area (Shafer et al. 1986): 43 acres / 17 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Supplemental, unpublished water chemistry data, University of Florida.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 |
7.0 |
Sulfate (mg/L) |
13.0 |
|
Total alkalinity (mg/L as CaCO3) |
11.0 |
Calcium (mg/L) |
8.9 |
|
Conductance (µS/cm @ 25 °C) |
118 |
Magnesium (mg/L) |
1.7 |
|
Color (Pt-Co units) |
26 |
Sodium (mg/L) |
8.3 |
|
Chloride (mg/L) |
22.5 |
Potassium (mg/L) |
3.0 |
|
Silicon (mg/L) |
0.5 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 86 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
8 |
32 |
64 |
|
Long-term total nitrogen concentrations (µg/L) |
730 |
1050 |
1910 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.7 |
13.5 |
110.5 |
|
Long-term Secchi depth (ft) |
2.0 |
4.9 |
11.5 |
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-08-99 |
37 |
880 |
18.7 |
6.0 |
|
Feb-02-99 |
39 |
850 |
2.3 |
5.0 |
|
Mar-02-99 |
24 |
830 |
7.3 |
6.0 |
|
Apr-02-99 |
32 |
840 |
3.0 |
6.0 |
|
May-04-99 |
63 |
1910 |
110.5 |
2.0 |
|
Jun-01-99 |
38 |
1170 |
13.7 |
4.0 |
|
Jul-02-99 |
42 |
1100 |
28.3 |
3.0 |
|
Aug-06-99 |
33 |
890 |
19.3 |
4.0 |
|
Sep-01-99 |
27 |
930 |
9.0 |
5.0 |
|
Oct-06-99 |
46 |
970 |
8.0 |
5.7 |
|
Nov-04-99 |
31 |
850 |
7.0 |
6.0 |
|
Dec-04-99 |
53 |
980 |
3.3 |
7.0 |
|
|
|
|
|
|
|
1999 Average |
39 |
1020 |
19.2 |
5.0 |