Longshore (Collier County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 26°16'7", Longitude 81°43'17"
Period of record: 16 sampling dates; December 17, 1996 to December 20, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Big Cypress
Geologic formation (Brooks 1981):
The geology is dominated clastic and shell deposits of the Fort Thompson Group Formation
Physiographic region (Brooks 1981):
The water body lies in the Corkscrew Swamp division of the Southwestern Flatwoods 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Supplemental, unpublished water chemistry data, University of Florida.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) |
12.3 |
|
Total alkalinity (mg/L as CaCO3) |
199.0 |
Conductance (µS/cm @ 25 °C) |
491 |
|
Color (Pt-Co units) |
39 |
Chloride (mg/L) |
32.8 |
|
Silicon (mg/L) |
1.8 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 16 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
14 |
25 |
49 |
|
Long-term total nitrogen concentrations (µg/L) |
450 |
710 |
930 |
|
Long-term total chlorophyll concentrations (µg/L) |
2.3 |
9.1 |
20.7 |
|
Long-term Secchi depth (ft) |
3.8 |
6.2 |
8.8 |
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-24-99 |
26 |
840 |
5.3 |
8.0 |
|
Apr-06-99 |
18 |
660 |
4.5 |
. |
|
Oct-17-99 |
23 |
650 |
15.0 |
8.8 |
|
Nov-25-99 |
24 |
730 |
4.7 |
7.0 |
|
Dec-20-99 |
23 |
930 |
11.0 |
6.7 |
|
|
|
|
|
|
|
1999 Average |
23 |
760 |
8.1 |
7.6 |