Rock (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°32'49", Longitude 81°24'5"
Period of record: 7 sampling dates; February 5, 1991 to October 13, 1991
Surface area (Shafer et al. 1986): 44 acres / 18 hectacres
Lake Region (Griffith et al. 1997): Orlando Ridge
Geologic formation (Brooks 1981):
The geology is dominated by phosphatic sand, silty sand, and clay of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Orlando Promontory division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 2 months sampled:
|
pH |
9.3 |
Sulfate (mg/L) |
7.3 |
|
Total alkalinity (mg/L as CaCO3) |
45.3 |
Calcium (mg/L) |
16.0 |
|
Conductance (µS/cm @ 25 °C) |
148 |
Magnesium (mg/L) |
2.0 |
|
Color (Pt-Co units) |
10 |
Sodium (mg/L) |
10.0 |
|
Chloride (mg/L) |
13.2 |
Potassium (mg/L) |
1.0 |
|
Silicon (mg/L) |
0.3 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 7 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
13 |
21 |
29 |
|
Long-term total nitrogen concentrations (µg/L) |
360 |
580 |
1010 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
10.2 |
36.3 |
|
Long-term Secchi depth (ft) |
3.0 |
10.8 |
17.7 |
Florida LAKEWATCH data were not collected in 1999.