Little Henderson (Citrus County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 28°50'54", Longitude 82°19'46"

Period of record: 49 sampling dates; August 23, 1991 to December 15, 1999

Surface area (LAKEWATCH): 247 acres / 100 hectacres     Bathymetric Map

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Supplemental, unpublished water chemistry data, University of Florida.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
7.5
 Sulfate (mg/L)
0.3
Total alkalinity (mg/L as CaCO3)
43.0
 Calcium (mg/L)
18.0
Conductance (µS/cm @ 25 °C)
130
 Magnesium (mg/L)
1.6
Color (Pt-Co units)
77
 Sodium (mg/L)
6.0
Chloride (mg/L)
15.0
 Potassium (mg/L)
1.1
Silicon (mg/L)
1.5
    

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 49 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
11
17
24
Long-term total nitrogen concentrations (µg/L)
600
870
1220
Long-term total chlorophyll concentrations (µg/L)
3.0
9.3
17.7
Long-term Secchi depth (ft)
3.0
5.7
9.3

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
15
730
6.0
8.0
Feb-24-99
14
670
5.3
7.5
Mar-22-99
16
610
4.3
7.7
Apr-23-99
18
750
3.7
6.5
May-20-99
20
860
8.0
7.5
Jun-18-99
17
750
16.7
5.5
Jul-20-99
16
770
8.0
7.5
Aug-20-99
15
820
12.3
6.0
Sep-22-99
13
730
12.7
6.0
Oct-20-99
11
610
7.3
8.0
Nov-22-99
13
700
6.0
8.5
Dec-15-99
14
730
5.7
9.2
         
1999 Average
15
730
8.0
7.3

Little Henderson (Citrus County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 2, 1992

Percent area covered with aquatic vegetation (PAC, %)
12
Percent of lake's volume filled with vegetation (PVI, %)
2
Average emergent plant biomass (kg wet wt/m2)
3.7
Average floating-leaved plant biomass (kg wet wt/m2)
1.1
Average submersed plant biomass (kg wet wt/m2)
3.2
Average width of emergent and floating-leaved zone (ft.)
283
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
90
Illinois pondweed Potamogeton illinoensis
70
knot grass Paspalum distichum
60
coontail Ceratophyllum demersum
50
cat-tail Typha spp.
40
elephant-ear Colocasia esculenta
40
floating water-hyacinth Eichhornia crassipes
30
water-pennywort Hydrocotyle umbellata
30
American lotus Nelumbo lutea
20
spatterdock Nuphar luteum
20
red ludwigia Ludwigia repens
20
water-moss Fontinalis spp.
20
water primrose Ludwigia octovalvis
20
slender spikerush Eleocharis baldwinii
10
pickerelweed Pontederia cordata
10
baby-tears Micranthemum umbrosum
10
tapegrass Vallisneria americana
10
purple bladderwort Utricularia purpurea
10
buttonbush Cephalanthus occidentalis
10
Florida bladderwort Utricularia floridana
10
bladderwort Utricularia foliosa
10

Little Henderson (Citrus County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on August 14, 1996

Percent area covered with aquatic vegetation (PAC, %)
2
Percent of lake's volume filled with vegetation (PVI, %)
1
Average emergent plant biomass (kg wet wt/m2)
2.9
Average floating-leaved plant biomass (kg wet wt/m2)
0.9
Average submersed plant biomass (kg wet wt/m2)
0.0
Average width of emergent and floating-leaved zone (ft.)
129
Average lake depth (m)
5

Frequency that plant species occur in 10 evenly spaced transects around the lake.

Common Name Plant Species
Frequency (%)
maidencane Panicum hemitomon
100
bald cypress Taxodium distichum
90
elephant-ear Colocasia esculenta
70
water spinach Ipomoea aquatica
60
wax myrtle Myrica cerifera
60
water primrose Ludwigia octovalvis
60
knot grass Paspalum distichum
60
common salvinia Salvinia rotundifolia
40
spatterdock Nuphar luteum
40
cat-tail Typha spp.
40
water-pennywort Hydrocotyle umbellata
40
floating water-hyacinth Eichhornia crassipes
30
slender spikerush Eleocharis baldwinii
30
American lotus Nelumbo lutea
30
buttonbush Cephalanthus occidentalis
30
torpedograss Panicum repens
30
common duckweed Lemna minor
20
alligator-weed Alternanthera philoxeroides
20
willow Salix spp.
20
duck-potato Sagittaria lancifolia
10
smartweed Polygonum hydropiperoides
10
coontail Ceratophyllum demersum
10
water hemlock Cicuta mexicana
10

Back to L lakes page