Horseshoe (Seminole County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°37'53", Longitude 81°8'3"
Period of record: 15 sampling dates; January 20, 1998 to December 21, 1999
Surface area (Shafer et al. 1986): 95 acres / 38 hectacres
Lake Region (Griffith et al. 1997): Eastern Flatlands
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 Casselberry-Oviedo-Geneva-Chuluota Hills 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Supplemental, unpublished water chemistry data, University of Florida.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 |
4.6 |
Sulfate (mg/L) |
2.0 |
|
Total alkalinity (mg/L as CaCO3) |
0.0 |
Calcium (mg/L) |
2.9 |
|
Conductance (µS/cm @ 25 °C) |
75 |
Magnesium (mg/L) |
1.2 |
|
Color (Pt-Co units) |
398 |
Sodium (mg/L) |
7.1 |
|
Chloride (mg/L) |
20.1 |
Potassium (mg/L) |
0.8 |
|
Silicon (mg/L) |
3.9 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 15 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
8 |
12 |
18 |
|
Long-term total nitrogen concentrations (µg/L) |
370 |
520 |
780 |
|
Long-term total chlorophyll concentrations (µg/L) |
3.0 |
5.6 |
11.0 |
|
Long-term Secchi depth (ft) |
1.4 |
2.3 |
3.8 |
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-25-99 |
9 |
480 |
3.7 |
2.1 |
|
Apr-07-99 |
8 |
410 |
3.7 |
2.6 |
|
May-11-99 |
8 |
420 |
3.3 |
2.9 |
|
Aug-20-99 |
. |
. |
4.0 |
. |
|
Oct-13-99 |
12 |
370 |
8.7 |
3.8 |
|
Nov-29-99 |
9 |
380 |
3.3 |
3.5 |
|
Dec-21-99 |
9 |
490 |
3.0 |
3.4 |
|
|
|
|
|
|
|
1999 Average |
9 |
430 |
4.2 |
3.1 |