Blanche (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°28'52", Longitude 81°30'59"
Period of record: 75 sampling dates; October 10, 1993 to December 27, 1999
Surface area (Shafer et al. 1986): 121 acres / 49 hectacres
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 Kissimmee Valley division of the Eastern Flatwoods 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Supplemental, unpublished water chemistry data, University of Florida.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) |
24.7 |
|
Total alkalinity (mg/L as CaCO3) |
27.0 |
Calcium (mg/L) |
13.0 |
|
Conductance (µS/cm @ 25 °C) |
206 |
Magnesium (mg/L) |
4.1 |
|
Color (Pt-Co units) |
15 |
Sodium (mg/L) |
12.0 |
|
Chloride (mg/L) |
30.7 |
Potassium (mg/L) |
6.4 |
|
Silicon (mg/L) |
0.3 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 75 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
4 |
8 |
17 |
|
Long-term total nitrogen concentrations (µg/L) |
270 |
380 |
530 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
3.6 |
13.0 |
|
Long-term Secchi depth (ft) |
8.2 |
14.6 |
20.0 |
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-19-99 |
6 |
340 |
3.0 |
18.2 |
|
Feb-18-99 |
8 |
350 |
3.0 |
15.7 |
|
Mar-22-99 |
7 |
340 |
2.3 |
16.3 |
|
Apr-22-99 |
8 |
360 |
2.0 |
14.8 |
|
May-20-99 |
9 |
360 |
1.7 |
15.3 |
|
Jun-07-99 |
6 |
370 |
2.0 |
16.7 |
|
Jul-19-99 |
5 |
340 |
2.0 |
18.3 |
|
Aug-21-99 |
7 |
330 |
4.0 |
15.3 |
|
Sep-27-99 |
10 |
420 |
4.3 |
13.3 |
|
Oct-27-99 |
9 |
410 |
4.7 |
13.4 |
|
Nov-26-99 |
9 |
390 |
4.0 |
15.8 |
|
Dec-27-99 |
9 |
480 |
4.0 |
17.7 |
|
|
|
|
|
|
|
1999 Average |
8 |
370 |
3.1 |
15.9 |