Rosalie (Polk County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 27°56'4", Longitude 81°24'18"
Period of record: 28 sampling dates; August 26, 1997 to December 20, 1999
Surface area (Shafer et al. 1986): No data available.
Lake Region (Griffith et al. 1997): Kissimmee/Okeechobee Lowland
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 Kissimmee Valley division of the Eastern Flatwoods District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 5 months sampled:
|
pH |
7.0 |
Sulfate (mg/L) |
12.3 |
|
Total alkalinity (mg/L as CaCO3) |
11.5 |
Calcium (mg/L) |
6.0 |
|
Conductance (µS/cm @ 25 °C) |
99 |
Magnesium (mg/L) |
8.1 |
|
Color (Pt-Co units) |
66 |
Sodium (mg/L) |
7.2 |
|
Chloride (mg/L) |
15.6 |
Potassium (mg/L) |
1.3 |
|
Silicon (mg/L) |
3.1 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 28 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
21 |
32 |
43 |
|
Long-term total nitrogen concentrations (µg/L) |
480 |
630 |
810 |
|
Long-term total chlorophyll concentrations (µg/L) |
2.3 |
6.0 |
14.8 |
|
Long-term Secchi depth (ft) |
2.4 |
4.5 |
6.5 |
1999 Florida LAKEWATCH Data
Numbers reported below are monthly averages calculated from 4 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-27-99 |
27 |
490 |
3.0 |
6.2 |
|
Feb-18-99 |
24 |
490 |
2.2 |
5.3 |
|
Mar-21-99 |
25 |
480 |
2.5 |
5.6 |
|
Apr-16-99 |
28 |
660 |
8.8 |
5.0 |
|
May-20-99 |
24 |
580 |
4.0 |
5.7 |
|
Jun-24-99 |
24 |
630 |
5.5 |
5.8 |
|
Jul-23-99 |
22 |
630 |
6.2 |
6.5 |
|
Aug-24-99 |
21 |
640 |
8.2 |
6.0 |
|
Sep-23-99 |
30 |
700 |
14.8 |
4.5 |
|
Nov-23-99 |
40 |
810 |
5.8 |
3.4 |
|
Dec-20-99 |
39 |
810 |
4.2 |
3.6 |
|
|
|
|
|
|
|
1999 Average |
28 |
630 |
5.9 |
5.2 |