Alma (Seminole County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°43'1", Longitude 81°21'8"
Period of record: 36 sampling dates; August 17, 1996 to December 30, 1999
Surface area (Shafer et al. 1986): 20 acres / 8 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Supplemental, unpublished water chemistry data, University of Florida.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 |
6.4 |
Sulfate (mg/L) |
0.0 |
|
Total alkalinity (mg/L as CaCO3) |
13.3 |
Calcium (mg/L) |
3.1 |
|
Conductance (µS/cm @ 25 °C) |
83 |
Magnesium (mg/L) |
1.8 |
|
Color (Pt-Co units) |
129 |
Sodium (mg/L) |
6.4 |
|
Chloride (mg/L) |
16.0 |
Potassium (mg/L) |
6.2 |
|
Silicon (mg/L) |
1.3 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 36 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
50 |
183 |
366 |
|
Long-term total nitrogen concentrations (µg/L) |
1420 |
2180 |
4390 |
|
Long-term total chlorophyll concentrations (µg/L) |
3.7 |
39.0 |
186.0 |
|
Long-term Secchi depth (ft) |
1.0 |
1.7 |
2.4 |
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-29-99 |
164 |
2070 |
62.5 |
2.0 |
|
Feb-27-99 |
220 |
2760 |
105.5 |
. |
|
Mar-28-99 |
246 |
1550 |
24.5 |
1.5 |
|
Jun-15-99 |
366 |
4390 |
68.5 |
1.0 |
|
Aug-29-99 |
170 |
3360 |
186.0 |
1.0 |
|
Sep-30-99 |
84 |
2330 |
27.5 |
1.0 |
|
Nov-25-99 |
68 |
2050 |
20.5 |
1.5 |
|
Dec-30-99 |
82 |
2080 |
56.0 |
1.5 |
|
|
|
|
|
|
|
1999 Average |
175 |
2570 |
68.9 |
1.4 |
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