Twin (Hillsborough County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°1'58", Longitude 82°29'23"
Period of record: 27 sampling dates; November 23, 1996 to December 19, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Land-O-Lakes
Geologic formation (Brooks 1981):
The geology is dominated by argillaceous to sandy impure limestone of the Tampa Formation.
Physiographic region (Brooks 1981):
The water body lies in the Land-O-Lakes subdivision of the Tampa Plain division of the Ocala Uplift District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 1 month sampled:
|
pH |
8.2 |
Sulfate (mg/L) |
22.7 |
|
Total alkalinity (mg/L as CaCO3) |
48.0 |
Calcium (mg/L) |
22.7 |
|
Conductance (µS/cm @ 25 °C) |
237 |
Magnesium (mg/L) |
2.3 |
|
Color (Pt-Co units) |
20 |
Sodium (mg/L) |
14.0 |
|
Chloride (mg/L) |
23.8 |
Potassium (mg/L) |
2.8 |
|
Silicon (mg/L) |
0.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 27 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
15 |
25 |
41 |
|
Long-term total nitrogen concentrations (µg/L) |
570 |
760 |
960 |
|
Long-term total chlorophyll concentrations (µg/L) |
10.0 |
21.6 |
33.7 |
|
Long-term Secchi depth (ft) |
2.5 |
3.8 |
6.2 |
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 |
|
Mar-10-99 |
26 |
820 |
24.3 |
4.5 |
|
Apr-30-99 |
26 |
840 |
24.0 |
4.0 |
|
May-31-99 |
20 |
720 |
13.0 |
4.7 |
|
Jun-12-99 |
15 |
840 |
19.7 |
2.8 |
|
Jul-14-99 |
18 |
840 |
18.7 |
3.7 |
|
Aug-28-99 |
18 |
710 |
17.0 |
2.7 |
|
Sep-27-99 |
24 |
750 |
31.7 |
2.5 |
|
Oct-30-99 |
25 |
770 |
27.0 |
2.7 |
|
Nov-14-99 |
24 |
770 |
27.7 |
2.5 |
|
Dec-19-99 |
30 |
880 |
11.0 |
4.5 |
|
|
|
|
|
|
|
1999 Average |
23 |
790 |
21.4 |
3.5 |