Powell (Bay County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 30°16'7", Longitude 85°58'49"
Period of record: 61 sampling dates; February 11, 1991 to December 12, 1999
Surface area (Shafer et al. 1986): 657 acres / 266 hectacres
Lake Region (Griffith et al. 1997): Gulf Coast Lowlands
Geologic formation (Brooks 1981):
The geology is dominated by fine sand and silt with lenses of gravel and clay of the Apalachicola paleo-cuspate delta and alluvial plain.
Physiographic region (Brooks 1981):
The water body lies in the Delta Plain and the Coastal Strip divisions of the Apalachicola Delta District.
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 61 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
7 |
14 |
25 |
|
Long-term total nitrogen concentrations (µg/L) |
220 |
420 |
730 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
4.4 |
10.3 |
|
Long-term Secchi depth (ft) |
2.0 |
5.5 |
9.0 |
1999 Florida LAKEWATCH Data
Numbers reported below are monthly averages calculated from 4 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 |
|
Jun-13-99 |
10 |
360 |
2.8 |
5.5 |
|
Sep-12-99 |
22 |
360 |
7.0 |
5.6 |
|
Dec-12-99 |
10 |
360 |
2.8 |
7.5 |
|
|
|
|
|
|
|
1999 Average |
14 |
360 |
4.2 |
6.2 |