Johnson (Clay County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°49'30", Longitude 81°56'16"
Period of record: 54 sampling dates; November 15, 1991 to September 12, 1998
Surface area (Shafer et al. 1986): 480 acres / 194 hectacres
Lake Region (Griffith et al. 1997): Trail Ridge
Geologic formation (Brooks 1981):
The geology is dominated by quartz sand and quartzite gravel with sandy clay beds of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Interlachen Sand Hills division of the Central Lake District.
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 54 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
3 |
8 |
16 |
|
Long-term total nitrogen concentrations (µg/L) |
130 |
220 |
400 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
3.2 |
8.7 |
|
Long-term Secchi depth (ft) |
2.0 |
6.2 |
11.9 |
Florida LAKEWATCH data were not collected in 1999.