Lower Louise (Volusia County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°19'57", Longitude 81°30'12"
Period of record: 14 sampling dates; July 27, 1990 to December 9, 1999
Surface area (Shafer et al. 1986): 257 acres / 104 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 St. John’s Offset 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Supplemental, unpublished water chemistry data, University of Florida.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 |
6.8 |
Sulfate (mg/L) |
20.0 |
|
Total alkalinity (mg/L as CaCO3) |
8.9 |
Calcium (mg/L) |
6.3 |
|
Conductance (µS/cm @ 25 °C) |
166 |
Magnesium (mg/L) |
5.4 |
|
Color (Pt-Co units) |
26 |
Sodium (mg/L) |
10.6 |
|
Chloride (mg/L) |
25.5 |
Potassium (mg/L) |
6.2 |
|
Silicon (mg/L) |
0.1 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 14 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
13 |
21 |
27 |
|
Long-term total nitrogen concentrations (µg/L) |
610 |
760 |
900 |
|
Long-term total chlorophyll concentrations (µg/L) |
4.3 |
10.4 |
18.7 |
|
Long-term Secchi depth (ft) |
3.3 |
5.5 |
8.0 |
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 |
|
Feb-09-99 |
20 |
610 |
5.7 |
7.4 |
|
Mar-09-99 |
19 |
630 |
4.3 |
6.0 |
|
Apr-09-99 |
17 |
650 |
6.0 |
6.2 |
|
May-09-99 |
13 |
810 |
6.3 |
5.7 |
|
Jun-09-99 |
24 |
820 |
7.3 |
6.0 |
|
Jul-09-99 |
20 |
770 |
7.7 |
6.1 |
|
Aug-09-99 |
27 |
900 |
18.7 |
3.5 |
|
Sep-10-99 |
27 |
880 |
17.0 |
3.3 |
|
Oct-08-99 |
24 |
790 |
18.0 |
3.8 |
|
Nov-09-99 |
25 |
810 |
10.3 |
3.8 |
|
Dec-09-99 |
22 |
880 |
16.0 |
3.8 |
|
|
|
|
|
|
|
1999 Average |
22 |
780 |
10.7 |
5.1 |