Little Johnson (Clay County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 29°49'31", Longitude 81°56'55"

Period of record: 55 sampling dates; November 15, 1991 to April 24, 1999

Surface area : No data available.

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 55 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
3
9
15
Long-term total nitrogen concentrations (µg/L)
90
210
440
Long-term total chlorophyll concentrations (µg/L)
1.0
3.5
17.3
Long-term Secchi depth (ft)
2.5
5.3
9.5

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
Apr-24-99
9
130
2.0
.
         
1999 Average
9
130
2.0
.

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