Big Sand Bay (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°25'35", Longitude 81°29'53"
Period of record: 40 sampling dates; July 31, 1996 to December 7, 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Supplemental, unpublished water chemistry data, University of Florida.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 |
7.5 |
Sulfate (mg/L) |
15.7 |
|
Total alkalinity (mg/L as CaCO3) |
35.0 |
Calcium (mg/L) |
16.3 |
|
Conductance (µS/cm @ 25 °C) |
178 |
Magnesium (mg/L) |
2.7 |
|
Color (Pt-Co units) |
49 |
Sodium (mg/L) |
9.7 |
|
Chloride (mg/L) |
22.7 |
Potassium (mg/L) |
5.6 |
|
Silicon (mg/L) |
1.1 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 40 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
12 |
18 |
41 |
|
Long-term total nitrogen concentrations (µg/L) |
370 |
610 |
990 |
|
Long-term total chlorophyll concentrations (µg/L) |
3.0 |
9.4 |
39.0 |
|
Long-term Secchi depth (ft) |
2.5 |
6.6 |
11.3 |
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-04-99 |
15 |
370 |
6.7 |
7.0 |
|
Apr-09-99 |
12 |
440 |
3.0 |
8.5 |
|
May-08-99 |
14 |
460 |
3.3 |
8.7 |
|
Jun-11-99 |
26 |
620 |
8.0 |
10.0 |
|
Jul-04-99 |
14 |
490 |
6.0 |
10.3 |
|
Aug-03-99 |
18 |
540 |
. |
10.0 |
|
Sep-15-99 |
. |
. |
15.0 |
11.3 |
|
Oct-01-99 |
23 |
680 |
12.7 |
10.7 |
|
Nov-10-99 |
18 |
420 |
9.0 |
8.2 |
|
Dec-07-99 |
15 |
590 |
9.3 |
7.0 |
|
|
|
|
|
|
|
1999 Average |
17 |
510 |
8.1 |
9.2 |