Fannie (Polk County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°3'42", Longitude 81°41'27"
Period of record: 72 sampling dates; June 30, 1990 to September 5, 1999
Surface area (Shafer et al. 1986): 829 acres / 335 hectacres
Lake Region (Griffith et al. 1997): Winter Haven/Lake Henry Ridges
Geologic formation (Brooks 1981):
The geology is dominated by deeply weathered clayey sand and granular sand of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Winter Haven Karst division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 3 months sampled:
|
pH |
7.8 |
Sulfate (mg/L) |
41.3 |
|
Total alkalinity (mg/L as CaCO3) |
38.9 |
Calcium (mg/L) |
11.7 |
|
Conductance (µS/cm @ 25 °C) |
352 |
Magnesium (mg/L) |
9.0 |
|
Color (Pt-Co units) |
59 |
Sodium (mg/L) |
38.8 |
|
Chloride (mg/L) |
50.6 |
Potassium (mg/L) |
15.8 |
|
Silicon (mg/L) |
1.8 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 72 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
13 |
40 |
84 |
|
Long-term total nitrogen concentrations (µg/L) |
540 |
970 |
1590 |
|
Long-term total chlorophyll concentrations (µg/L) |
4.7 |
24.1 |
72.0 |
|
Long-term Secchi depth (ft) |
0.7 |
2.6 |
6.0 |
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 |
|
Jan-10-99 |
16 |
680 |
8.7 |
6.0 |
|
Feb-05-99 |
28 |
660 |
10.3 |
4.0 |
|
Mar-06-99 |
22 |
560 |
10.3 |
4.2 |
|
Apr-03-99 |
25 |
810 |
8.7 |
3.8 |
|
May-09-99 |
30 |
840 |
17.3 |
3.0 |
|
Jun-06-99 |
25 |
910 |
21.3 |
3.5 |
|
Jul-05-99 |
28 |
610 |
11.0 |
4.0 |
|
Aug-08-99 |
30 |
830 |
. |
. |
|
Sep-05-99 |
25 |
760 |
20.3 |
2.7 |
|
|
|
|
|
|
|
1999 Average |
25 |
740 |
13.5 |
3.9 |
Fannie (Polk County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 19, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
46 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
4 |
|
Average emergent plant biomass (kg wet wt/m2) |
7.1 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
4.1 |
|
Average submersed plant biomass (kg wet wt/m2) |
8.4 |
|
Average width of emergent and floating-leaved zone (ft.) |
451 |
|
Average lake depth (m) |
2 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
cat-tail |
Typha spp. |
100 |
|
spatterdock |
Nuphar luteum |
90 |
|
duck-potato |
Sagittaria lancifolia |
70 |
|
willow |
Salix spp. |
70 |
|
common salvinia |
Salvinia rotundifolia |
60 |
|
water-pennywort |
Hydrocotyle umbellata |
60 |
|
hydrilla |
Hydrilla verticillata |
60 |
|
water-lettuce |
Pistia stratiotes |
50 |
|
elephant-ear |
Colocasia esculenta |
50 |
|
green algae |
Chlorphyta |
50 |
|
pickerelweed |
Pontederia cordata |
40 |
|
water primrose |
Ludwigia octovalvis |
40 |
|
torpedograss |
Panicum repens |
40 |
|
American lotus |
Nelumbo lutea |
30 |
|
coontail |
Ceratophyllum demersum |
30 |
|
maidencane |
Panicum hemitomon |
30 |
|
Baldwin flat sedge |
Cyperus globulosus |
30 |
|
alligator-weed |
Alternanthera philoxeroides |
20 |
|
slender spikerush |
Eleocharis baldwinii |
20 |
|
common duckweed |
Lemna minor |
10 |
|
giant bulrush |
Scirpus californicus |
10 |
|
para grass |
Brachiaria mutica |
10 |
|
soft rush |
Juncus effusus |
10 |