Hartridge (Polk County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°3'18", Longitude 81°44'34"
Period of record: 18 sampling dates; April 11, 1992 to November 30, 1999
Surface area (Shafer et al. 1986): 434 acres / 176 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Supplemental, unpublished water chemistry data, University of Florida.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 4 months sampled:
|
pH |
7.9 |
Sulfate (mg/L) |
27.0 |
|
Total alkalinity (mg/L as CaCO3) |
38.8 |
Calcium (mg/L) |
13.8 |
|
Conductance (µS/cm @ 25 °C) |
220 |
Magnesium (mg/L) |
6.7 |
|
Color (Pt-Co units) |
11 |
Sodium (mg/L) |
14.0 |
|
Chloride (mg/L) |
22.1 |
Potassium (mg/L) |
5.2 |
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 18 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
9 |
21 |
32 |
|
Long-term total nitrogen concentrations (µg/L) |
400 |
710 |
1190 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
19.9 |
51.3 |
|
Long-term Secchi depth (ft) |
2.1 |
4.7 |
14.0 |
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 |
|
Mar-07-99 |
24 |
520 |
11.0 |
3.6 |
|
Mar-31-99 |
24 |
700 |
12.3 |
4.2 |
|
May-30-99 |
25 |
710 |
17.7 |
4.4 |
|
Jul-05-99 |
23 |
750 |
16.0 |
3.5 |
|
Aug-22-99 |
19 |
630 |
19.0 |
4.4 |
|
Nov-30-99 |
27 |
740 |
17.3 |
3.9 |
|
|
|
|
|
|
|
1999 Average |
24 |
670 |
15.6 |
4.0 |
Hartridge (Polk County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 18, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
88 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
25 |
|
Average emergent plant biomass (kg wet wt/m2) |
5.8 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.5 |
|
Average submersed plant biomass (kg wet wt/m2) |
15.4 |
|
Average width of emergent and floating-leaved zone (ft.) |
173 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
cat-tail |
Typha spp. |
100 |
|
hydrilla |
Hydrilla verticillata |
90 |
|
tapegrass |
Vallisneria americana |
70 |
|
willow |
Salix spp. |
70 |
|
purple fanwort |
Cabomba pulcherrima |
50 |
|
coontail |
Ceratophyllum demersum |
30 |
|
water primrose |
Ludwigia octovalvis |
30 |
|
spatterdock |
Nuphar luteum |
20 |
|
pickerelweed |
Pontederia cordata |
20 |
|
torpedograss |
Panicum repens |
20 |
|
common duckweed |
Lemna minor |
10 |
|
floating water-hyacinth |
Eichhornia crassipes |
10 |
|
water-pennywort |
Hydrocotyle umbellata |
10 |
|
cone-spur bladderwort |
Utricularia gibba |
10 |
|
purple bladderwort |
Utricularia purpurea |
10 |
|
elephant-ear |
Colocasia esculenta |
10 |
|
maidencane |
Panicum hemitomon |
10 |
|
elderberry |
Sambucus canadensis |
10 |
|
. |
Nitella prolonga |
10 |