Dora East (Lake County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°47'32", Longitude 81°39'24"
Period of record: 108 sampling dates; June 8, 1990 to December 17, 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Supplemental, unpublished water chemistry data, University of Florida.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 2 months sampled:
|
pH |
8.7 |
Sulfate (mg/L) |
21.0 |
|
Total alkalinity (mg/L as CaCO3) |
126.2 |
Calcium (mg/L) |
38.5 |
|
Conductance (µS/cm @ 25 °C) |
416 |
Magnesium (mg/L) |
16.3 |
|
Color (Pt-Co units) |
36 |
Sodium (mg/L) |
16.5 |
|
Chloride (mg/L) |
40.8 |
Potassium (mg/L) |
11.5 |
|
Silicon (mg/L) |
9.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 108 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
44 |
97 |
281 |
|
Long-term total nitrogen concentrations (µg/L) |
2120 |
3570 |
4900 |
|
Long-term total chlorophyll concentrations (µg/L) |
26.0 |
174.0 |
344.7 |
|
Long-term Secchi depth (ft) |
0.7 |
1.2 |
2.7 |
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-22-99 |
96 |
3710 |
244.3 |
1.0 |
|
Feb-19-99 |
105 |
3770 |
238.0 |
0.8 |
|
Mar-18-99 |
108 |
4260 |
262.0 |
1.0 |
|
Apr-26-99 |
93 |
4470 |
307.0 |
1.0 |
|
May-18-99 |
90 |
4900 |
344.7 |
0.8 |
|
Jun-14-99 |
85 |
4230 |
208.0 |
1.0 |
|
Jul-23-99 |
70 |
4220 |
196.3 |
0.9 |
|
Aug-23-99 |
75 |
4370 |
242.3 |
1.0 |
|
Sep-27-99 |
83 |
4370 |
270.3 |
1.0 |
|
Oct-11-99 |
90 |
4590 |
280.0 |
1.0 |
|
Nov-19-99 |
118 |
4370 |
276.7 |
0.8 |
|
Dec-17-99 |
133 |
3950 |
261.7 |
1.0 |
|
|
|
|
|
|
|
1999 Average |
96 |
4270 |
260.9 |
0.9 |
Dora East (Lake County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 14, 1992
|
Percent area covered with aquatic vegetation (PAC, %) |
36 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
25 |
|
Average emergent plant biomass (kg wet wt/m2) |
4.6 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.0 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.3 |
|
Average width of emergent and floating-leaved zone (ft.) |
39 |
|
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. |
90 |
|
knot grass |
Paspalum distichum |
50 |
|
water primrose |
Ludwigia octovalvis |
40 |
|
maidencane |
Panicum hemitomon |
40 |
|
elephant-ear |
Colocasia esculenta |
30 |
|
torpedograss |
Panicum repens |
30 |
|
pickerelweed |
Pontederia cordata |
20 |
|
water-pennywort |
Hydrocotyle umbellata |
20 |
|
duck-potato |
Sagittaria lancifolia |
10 |
|
tapegrass |
Vallisneria americana |
10 |
|
willow |
Salix spp. |
10 |