Sylvan (Seminole County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°48'17", Longitude 81°22'49"
Period of record: 12 sampling dates; March 20, 1998 to August 7, 1999
Surface area (Shafer et al. 1986): 186 acres / 75 hectacres
Lake Region (Griffith et al. 1997): Crescent City/DeLand Ridges
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Supplemental, unpublished water chemistry data, University of Florida.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 1 month sampled:
|
pH |
5.6 |
Sulfate (mg/L) |
19.3 |
|
Total alkalinity (mg/L as CaCO3) |
0.7 |
Calcium (mg/L) |
4.9 |
|
Conductance (µS/cm @ 25 °C) |
117 |
Magnesium (mg/L) |
3.5 |
|
Color (Pt-Co units) |
43 |
Sodium (mg/L) |
9.4 |
|
Chloride (mg/L) |
20.3 |
Potassium (mg/L) |
0.7 |
|
Silicon (mg/L) |
0.0 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 12 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
7 |
11 |
14 |
|
Long-term total nitrogen concentrations (µg/L) |
420 |
580 |
740 |
|
Long-term total chlorophyll concentrations (µg/L) |
5.0 |
8.1 |
14.0 |
|
Long-term Secchi depth (ft) |
2.2 |
5.5 |
8.5 |
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-17-99 |
7 |
540 |
6.7 |
8.5 |
|
Feb-21-99 |
11 |
540 |
5.0 |
6.7 |
|
May-25-99 |
10 |
490 |
5.3 |
6.2 |
|
Jun-30-99 |
11 |
570 |
9.0 |
5.2 |
|
Aug-07-99 |
11 |
590 |
6.7 |
7.7 |
|
|
|
|
|
|
|
1999 Average |
10 |
550 |
6.5 |
6.8 |