Henderson (Citrus County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°50'20", Longitude 82°19'4"
Period of record: 43 sampling dates; August 23, 1991 to June 11, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Tsala Apopka
Geologic formation (Brooks 1981):
The geology is a mixture of two major types dominated by phosphatic sand, silty sand, and clay of the Hawthorne Formation and limestone consisting of skeletons of fossils in a silt to sand size matrix of the Ocala Limestone Formation.
Physiographic region (Brooks 1981):
The water body lies in the Hernando Hammock and Tsala Apopka Basin divisions of the Ocala Uplift District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 1 month sampled:
|
pH |
7.6 |
Sulfate (mg/L) |
0.0 |
|
Total alkalinity (mg/L as CaCO3) |
47.0 |
Calcium (mg/L) |
19.3 |
|
Conductance (µS/cm @ 25 °C) |
141 |
Magnesium (mg/L) |
1.7 |
|
Color (Pt-Co units) |
107 |
Sodium (mg/L) |
6.3 |
|
Chloride (mg/L) |
14.3 |
Potassium (mg/L) |
1.3 |
|
Silicon (mg/L) |
1.6 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 43 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
12 |
20 |
36 |
|
Long-term total nitrogen concentrations (µg/L) |
640 |
940 |
1240 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.7 |
9.4 |
26.0 |
|
Long-term Secchi depth (ft) |
2.0 |
5.3 |
13.8 |
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-19-99 |
15 |
670 |
7.0 |
9.0 |
|
Feb-17-99 |
14 |
670 |
4.7 |
13.8 |
|
Mar-22-99 |
16 |
640 |
5.3 |
6.8 |
|
Apr-14-99 |
19 |
770 |
6.7 |
5.0 |
|
May-17-99 |
22 |
800 |
8.0 |
7.0 |
|
Jun-11-99 |
16 |
840 |
4.0 |
5.5 |
|
|
|
|
|
|
|
1999 Average |
17 |
730 |
5.9 |
7.9 |
Henderson (Citrus County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on June 24, 1992
|
Percent area covered with aquatic vegetation (PAC, %) |
14 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
2 |
|
Average emergent plant biomass (kg wet wt/m2) |
3.5 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
3.6 |
|
Average submersed plant biomass (kg wet wt/m2) |
4.0 |
|
Average width of emergent and floating-leaved zone (ft.) |
121 |
|
Average lake depth (m) |
2 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
Illinois pondweed |
Potamogeton illinoensis |
90 |
|
maidencane |
Panicum hemitomon |
80 |
|
cat-tail |
Typha spp. |
70 |
|
spatterdock |
Nuphar luteum |
60 |
|
coontail |
Ceratophyllum demersum |
60 |
|
floating water-hyacinth |
Eichhornia crassipes |
40 |
|
slender spikerush |
Eleocharis baldwinii |
40 |
|
hydrilla |
Hydrilla verticillata |
40 |
|
common salvinia |
Salvinia rotundifolia |
30 |
|
water-pennywort |
Hydrocotyle umbellata |
20 |
|
southern cutgrass |
Leersia hexandra |
20 |
|
bladderwort |
Utricularia foliosa |
20 |
|
American lotus |
Nelumbo lutea |
10 |
|
pickerelweed |
Pontederia cordata |
10 |
|
southern naiad |
Najas guadalupensis |
10 |
|
torpedograss |
Panicum repens |
10 |
Henderson (Citrus County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on June 20, 1996
|
Percent area covered with aquatic vegetation (PAC, %) |
10 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
2 |
|
Average emergent plant biomass (kg wet wt/m2) |
10.5 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
2.0 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.0 |
|
Average width of emergent and floating-leaved zone (ft.) |
68 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
maidencane |
Panicum hemitomon |
100 |
|
alligator-weed |
Alternanthera philoxeroides |
80 |
|
cat-tail |
Typha spp. |
80 |
|
common salvinia |
Salvinia rotundifolia |
70 |
|
wax myrtle |
Myrica cerifera |
70 |
|
bald cypress |
Taxodium distichum |
70 |
|
slender spikerush |
Eleocharis baldwinii |
50 |
|
American lotus |
Nelumbo lutea |
50 |
|
willow |
Salix spp. |
50 |
|
torpedograss |
Panicum repens |
50 |
|
knot grass |
Paspalum distichum |
50 |
|
spatterdock |
Nuphar luteum |
40 |
|
coontail |
Ceratophyllum demersum |
40 |
|
elephant-ear |
Colocasia esculenta |
40 |
|
water-pennywort |
Hydrocotyle umbellata |
30 |
|
smartweed |
Polygonum hydropiperoides |
20 |
|
buttonbush |
Cephalanthus occidentalis |
20 |
|
water-lettuce |
Pistia stratiotes |
10 |
|
duck-potato |
Sagittaria lancifolia |
10 |
|
water spinach |
Ipomoea aquatica |
10 |
|
banana-lily |
Nymphoides aquatica |
10 |
|
fragrant water-lily |
Nymphaea odorata |
10 |
|
bacopa |
Bacopa monnieri |
10 |
|
hydrilla |
Hydrilla verticillata |
10 |
|
water primrose |
Ludwigia octovalvis |
10 |
|
elderberry |
Sambucus canadensis |
10 |