Big Sand (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°26'4", Longitude 81°29'23"
Period of record: 41 sampling dates; July 31, 1996 to November 29, 1999
Surface area (Shafer et al. 1986): No data available.
Lake Region (Griffith et al. 1997): Doctor Phillips 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 Dr. Phillips Ridge division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 1 month sampled:
|
pH |
7.7 |
Sulfate (mg/L) |
17.0 |
|
Total alkalinity (mg/L as CaCO3) |
23.0 |
Calcium (mg/L) |
12.0 |
|
Conductance (µS/cm @ 25 °C) |
158 |
Magnesium (mg/L) |
3.0 |
|
Color (Pt-Co units) |
6 |
Sodium (mg/L) |
8.6 |
|
Chloride (mg/L) |
19.0 |
Potassium (mg/L) |
5.0 |
|
Silicon (mg/L) |
0.3 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 41 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
4 |
7 |
12 |
|
Long-term total nitrogen concentrations (µg/L) |
330 |
500 |
720 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
2.3 |
5.7 |
|
Long-term Secchi depth (ft) |
10.0 |
14.7 |
19.0 |
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 |
|
Feb-05-99 |
8 |
570 |
2.3 |
17.5 |
|
Feb-28-99 |
7 |
450 |
1.0 |
18.0 |
|
Mar-25-99 |
8 |
440 |
2.0 |
17.0 |
|
May-03-99 |
8 |
490 |
2.0 |
13.0 |
|
May-31-99 |
10 |
480 |
2.0 |
. |
|
Jun-29-99 |
7 |
440 |
2.0 |
14.0 |
|
Aug-08-99 |
11 |
630 |
4.0 |
17.0 |
|
Sep-01-99 |
8 |
700 |
3.0 |
14.0 |
|
Sep-27-99 |
10 |
720 |
4.0 |
14.0 |
|
Nov-01-99 |
9 |
600 |
2.0 |
13.5 |
|
Nov-29-99 |
8 |
490 |
2.7 |
19.0 |
|
|
|
|
|
|
|
1999 Average |
9 |
550 |
2.5 |
15.7 |