Marianna (Polk County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°4'33", Longitude 81°45'55"
Period of record: 10 sampling dates; October 31, 1991 to June 2, 1992
Surface area (Shafer et al. 1986): 503 acres / 204 hectacres
Lake Region (Griffith et al. 1997): Winter Haven/Lake Henry Ridges
Geologic formation (Brooks 1981):
The geology is a mixture of two major types dominated by phospatic sand, clayey fine sand, and clay of the Bone Valley Formation and 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Supplemental, unpublished water chemistry data, University of Florida.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 |
7.9 |
Total alkalinity (mg/L as CaCO3) |
59.4 |
|
Calcium (mg/L) |
21.0 |
Potassium (mg/L) |
9.0 |
|
Conductance (µS/cm @ 25 °C) |
299 |
Magnesium (mg/L) |
8.9 |
|
Color (Pt-Co units) |
16 |
Sodium (mg/L) |
19.8 |
|
Chloride (mg/L) |
30.6 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 10 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
20 |
34 |
43 |
|
Long-term total nitrogen concentrations (µg/L) |
770 |
940 |
1400 |
|
Long-term total chlorophyll concentrations (µg/L) |
3.0 |
21.0 |
51.3 |
|
Long-term Secchi depth (ft) |
2.3 |
3.0 |
3.5 |
Florida LAKEWATCH data were not collected in 1999.
Marianna (Polk County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on June 21, 1994
|
Percent area covered with aquatic vegetation (PAC, %) |
30 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
8 |
|
Average emergent plant biomass (kg wet wt/m2) |
1.6 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
2.7 |
|
Average submersed plant biomass (kg wet wt/m2) |
2.8 |
|
Average width of emergent and floating-leaved zone (ft.) |
22 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
tapegrass |
Vallisneria americana |
70 |
|
elephant-ear |
Colocasia esculenta |
60 |
|
water primrose |
Ludwigia octovalvis |
60 |
|
floating water-hyacinth |
Eichhornia crassipes |
50 |
|
cat-tail |
Typha spp. |
50 |
|
water-pennywort |
Hydrocotyle umbellata |
50 |
|
common salvinia |
Salvinia rotundifolia |
40 |
|
hydrilla |
Hydrilla verticillata |
40 |
|
willow |
Salix spp. |
40 |
|
maidencane |
Panicum hemitomon |
40 |
|
elderberry |
Sambucus canadensis |
40 |
|
alligator-weed |
Alternanthera philoxeroides |
30 |
|
common duckweed |
Lemna minor |
20 |
|
duck-potato |
Sagittaria lancifolia |
20 |
|
spatterdock |
Nuphar luteum |
20 |
|
pickerelweed |
Pontederia cordata |
20 |
|
torpedograss |
Panicum repens |
20 |
|
southern naiad |
Najas guadalupensis |
10 |
|
Brazilian pepper |
Schinus terebinthifolius |
10 |
|
wax myrtle |
Myrica cerifera |
10 |
|
buttonbush |
Cephalanthus occidentalis |
10 |
|
musk-grass |
Chara spp. |
10 |
|
green algae |
Chlorphyta |
10 |
|
stonewort |
Nitella spp. |
10 |
|
jointed flat sedge |
Cyperus haspan |
10 |