Twin (Clay County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°46'4", Longitude 81°59'52"
Period of record: 41 sampling dates; August 24, 1996 to December 20, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Trail Ridge
Geologic formation (Brooks 1981):
The geology is dominated by quartz sand and quartzite gravel with sandy clay beds of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Interlachen Sand 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Supplemental, unpublished water chemistry data, University of Florida.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 |
6.7 |
Sulfate (mg/L) |
2.7 |
|
Total alkalinity (mg/L as CaCO3) |
3.9 |
Calcium (mg/L) |
2.2 |
|
Conductance (µS/cm @ 25 °C) |
48 |
Magnesium (mg/L) |
0.8 |
|
Color (Pt-Co units) |
6 |
Sodium (mg/L) |
4.4 |
|
Chloride (mg/L) |
8.6 |
Potassium (mg/L) |
0.4 |
|
Silicon (mg/L) |
0.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 41 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
8 |
11 |
17 |
|
Long-term total nitrogen concentrations (µg/L) |
190 |
280 |
380 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.3 |
4.4 |
11.0 |
|
Long-term Secchi depth (ft) |
6.0 |
9.1 |
14.7 |
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-20-99 |
10 |
300 |
5.3 |
10.0 |
|
Feb-20-99 |
11 |
270 |
6.3 |
8.2 |
|
Mar-21-99 |
9 |
280 |
5.3 |
9.0 |
|
Apr-20-99 |
14 |
280 |
5.7 |
7.5 |
|
May-22-99 |
13 |
270 |
3.0 |
9.5 |
|
Jun-22-99 |
10 |
320 |
3.7 |
9.4 |
|
Jul-20-99 |
8 |
320 |
2.3 |
10.0 |
|
Aug-20-99 |
13 |
380 |
6.0 |
9.0 |
|
Sep-23-99 |
13 |
340 |
8.7 |
6.5 |
|
Oct-22-99 |
15 |
370 |
8.3 |
7.0 |
|
Nov-20-99 |
12 |
340 |
5.0 |
7.1 |
|
Dec-20-99 |
11 |
360 |
4.3 |
8.3 |
|
|
|
|
|
|
|
1999 Average |
12 |
320 |
5.3 |
8.5 |