Estelle (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°34'30", Longitude 81°22'0"
Period of record: 75 sampling dates; January 23, 1991 to December 7, 1999
Surface area (Shafer et al. 1986): 22 acres / 9 hectacres
Lake Region (Griffith et al. 1997): Orlando 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 Orlando Promontory division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 2 months sampled:
|
pH |
8.5 |
Sulfate (mg/L) |
11.0 |
|
Total alkalinity (mg/L as CaCO3) |
47.7 |
Calcium (mg/L) |
18.8 |
|
Conductance (µS/cm @ 25 °C) |
167 |
Magnesium (mg/L) |
3.3 |
|
Color (Pt-Co units) |
21 |
Sodium (mg/L) |
8.0 |
|
Chloride (mg/L) |
15.2 |
Potassium (mg/L) |
2.0 |
|
Silicon (mg/L) |
0.7 |
|
|
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) |
26 |
42 |
64 |
|
Long-term total nitrogen concentrations (µg/L) |
470 |
780 |
1230 |
|
Long-term total chlorophyll concentrations (µg/L) |
6.0 |
30.5 |
68.3 |
|
Long-term Secchi depth (ft) |
2.2 |
3.4 |
7.0 |
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 |
41 |
650 |
18.7 |
5.0 |
|
Feb-09-99 |
29 |
530 |
10.7 |
5.0 |
|
Apr-06-99 |
28 |
580 |
6.0 |
4.0 |
|
May-04-99 |
26 |
470 |
9.3 |
3.3 |
|
May-28-99 |
40 |
970 |
18.7 |
. |
|
Aug-31-99 |
29 |
780 |
28.7 |
3.8 |
|
Sep-23-99 |
42 |
770 |
44.7 |
4.5 |
|
Oct-05-99 |
33 |
700 |
47.0 |
2.8 |
|
Nov-09-99 |
46 |
750 |
45.0 |
2.8 |
|
Dec-07-99 |
44 |
700 |
. |
. |
|
|
|
|
|
|
|
1999 Average |
36 |
690 |
25.4 |
3.9 |