Little Harris (Lake County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°43'15", Longitude 81°45'15"
Period of record: 62 sampling dates; January 20, 1990 to November 28, 1999
Surface area (Shafer et al. 1986): No data available.
Lake Region (Griffith et al. 1997): Central Valley
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 Central Lakes 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Supplemental, unpublished water chemistry data, University of Florida.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 |
8.3 |
Sulfate (mg/L) |
9.9 |
|
Total alkalinity (mg/L as CaCO3) |
106.4 |
Calcium (mg/L) |
32.5 |
|
Conductance (µS/cm @ 25 °C) |
288 |
Magnesium (mg/L) |
7.5 |
|
Color (Pt-Co units) |
14 |
Sodium (mg/L) |
10.5 |
|
Chloride (mg/L) |
18.8 |
Potassium (mg/L) |
3.7 |
|
Silicon (mg/L) |
4.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 62 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
15 |
34 |
54 |
|
Long-term total nitrogen concentrations (µg/L) |
1050 |
1750 |
2220 |
|
Long-term total chlorophyll concentrations (µg/L) |
5.0 |
59.6 |
111.0 |
|
Long-term Secchi depth (ft) |
1.0 |
2.2 |
6.2 |
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-17-99 |
44 |
1840 |
77.0 |
1.3 |
|
Feb-07-99 |
47 |
1900 |
100.3 |
1.5 |
|
Mar-19-99 |
45 |
1870 |
104.3 |
1.2 |
|
Apr-18-99 |
52 |
2020 |
111.0 |
1.2 |
|
May-09-99 |
45 |
. |
91.7 |
1.3 |
|
Jun-06-99 |
40 |
1930 |
61.7 |
1.5 |
|
Oct-27-99 |
54 |
2100 |
93.7 |
1.3 |
|
Nov-28-99 |
51 |
1880 |
80.0 |
1.8 |
|
|
|
|
|
|
|
1999 Average |
47 |
1930 |
90.0 |
1.4 |
Little Harris (Lake County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on June 16, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
36 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
4 |
|
Average emergent plant biomass (kg wet wt/m2) |
2.7 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
1.3 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.9 |
|
Average width of emergent and floating-leaved zone (ft.) |
77 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 15 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
maidencane |
Panicum hemitomon |
87 |
|
knot grass |
Paspalum distichum |
87 |
|
bald cypress |
Taxodium distichum |
87 |
|
duck-potato |
Sagittaria lancifolia |
67 |
|
wax myrtle |
Myrica cerifera |
60 |
|
tapegrass |
Vallisneria americana |
53 |
|
elephant-ear |
Colocasia esculenta |
47 |
|
sawgrass |
Cladium jamaicense |
47 |
|
spatterdock |
Nuphar luteum |
40 |
|
elderberry |
Sambucus canadensis |
40 |
|
pickerelweed |
Pontederia cordata |
33 |
|
buttonbush |
Cephalanthus occidentalis |
33 |
|
willow |
Salix spp. |
33 |
|
fragrant water-lily |
Nymphaea odorata |
27 |
|
cat-tail |
Typha spp. |
20 |
|
water primrose |
Ludwigia octovalvis |
13 |
|
floating water-hyacinth |
Eichhornia crassipes |
7 |
|
sedge family |
Cyperaceae |
7 |
|
torpedograss |
Panicum repens |
7 |
|
giant reed |
Phragmites australis |
7 |