Pearl (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°36'16", Longitude 81°15'54"
Period of record: 36 sampling dates; July 25, 1994 to December 19, 1999
Surface area (Shafer et al. 1986): 58 acres / 23 hectacres
Lake Region (Griffith et al. 1997): Orlando Ridge
Geologic formation (Brooks 1981):
The geology is dominated by coastal sand and shelly silty sand of the preglacial Pleistocene.
Physiographic region (Brooks 1981):
The water body lies in the Holopaw-Indian Town Ridges and Swales division of the Eastern Flatwoods District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 7 months sampled:
|
pH |
7.4 |
Total alkalinity (mg/L as CaCO3) |
19.2 |
|
Calcium (mg/L) |
9.3 |
Potassium (mg/L) |
3.7 |
|
Conductance (µS/cm @ 25 °C) |
121 |
Magnesium (mg/L) |
3.1 |
|
Color (Pt-Co units) |
62 |
Sodium (mg/L) |
7.4 |
|
Chloride (mg/L) |
18.5 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 36 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
17 |
32 |
47 |
|
Long-term total nitrogen concentrations (µg/L) |
590 |
890 |
1570 |
|
Long-term total chlorophyll concentrations (µg/L) |
16.3 |
33.2 |
53.0 |
|
Long-term Secchi depth (ft) |
2.0 |
2.9 |
4.0 |
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-17-99 |
34 |
1070 |
31.0 |
2.8 |
|
Feb-26-99 |
25 |
1070 |
24.7 |
3.0 |
|
Jul-24-99 |
34 |
1370 |
37.0 |
2.7 |
|
Aug-29-99 |
39 |
1570 |
51.3 |
2.7 |
|
Dec-19-99 |
25 |
1270 |
46.7 |
3.0 |
|
|
|
|
|
|
|
1999 Average |
31 |
1270 |
38.1 |
2.8 |