Clear (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°31'9", Longitude 81°24'37"
Period of record: 69 sampling dates; November 17, 1990 to December 29, 1999
Surface area (Shafer et al. 1986): 339 acres / 137 hectacres
Lake Region (Griffith et al. 1997): Orlando Ridge
Geologic formation (Brooks 1981):
The geology is dominated by phosphatic sand, silty sand, and clay of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Orlando Promontory 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Supplemental, unpublished water chemistry data, University of Florida.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 |
8.0 |
Sulfate (mg/L) |
9.7 |
|
Total alkalinity (mg/L as CaCO3) |
70.0 |
Calcium (mg/L) |
25.0 |
|
Conductance (µS/cm @ 25 °C) |
206 |
Magnesium (mg/L) |
2.5 |
|
Color (Pt-Co units) |
18 |
Sodium (mg/L) |
10.5 |
|
Chloride (mg/L) |
14.0 |
Potassium (mg/L) |
2.5 |
|
Silicon (mg/L) |
0.4 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 69 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
24 |
72 |
427 |
|
Long-term total nitrogen concentrations (µg/L) |
630 |
1340 |
3330 |
|
Long-term total chlorophyll concentrations (µg/L) |
17.3 |
58.0 |
123.0 |
|
Long-term Secchi depth (ft) |
1.2 |
2.3 |
4.5 |
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-30-99 |
427 |
3330 |
31.0 |
2.5 |
|
Feb-20-99 |
66 |
1190 |
57.7 |
2.3 |
|
Mar-28-99 |
55 |
1230 |
47.0 |
2.0 |
|
May-28-99 |
40 |
1550 |
55.0 |
2.0 |
|
Jun-26-99 |
42 |
1240 |
55.7 |
2.1 |
|
Jul-17-99 |
28 |
1060 |
35.3 |
2.7 |
|
Aug-15-99 |
33 |
1200 |
55.7 |
2.3 |
|
Nov-12-99 |
55 |
1330 |
70.7 |
2.5 |
|
Dec-29-99 |
56 |
1380 |
74.0 |
2.9 |
|
|
|
|
|
|
|
1999 Average |
89 |
1500 |
53.6 |
2.4 |
Clear (Orange County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on June 13, 1991
|
Percent area covered with aquatic vegetation (PAC, %) |
0 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
0 |
|
Average emergent plant biomass (kg wet wt/m2) |
not sampled |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
not sampled |
|
Average submersed plant biomass (kg wet wt/m2) |
not sampled |
|
Average width of emergent and floating-leaved zone (ft.) |
not sampled |
|
Average lake depth (m) |
4 |
Frequency that plant species occur in 0 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
not sampled
Clear (Orange County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 21, 1994
|
Percent area covered with aquatic vegetation (PAC, %) |
10 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
1 |
|
Average emergent plant biomass (kg wet wt/m2) |
1.1 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.2 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.0 |
|
Average width of emergent and floating-leaved zone (ft.) |
17 |
|
Average lake depth (m) |
4 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
elephant-ear |
Colocasia esculenta |
70 |
|
wax myrtle |
Myrica cerifera |
70 |
|
water primrose |
Ludwigia octovalvis |
60 |
|
giant bulrush |
Scirpus californicus |
60 |
|
bald cypress |
Taxodium distichum |
60 |
|
alligator-weed |
Alternanthera philoxeroides |
50 |
|
Illinois pondweed |
Potamogeton illinoensis |
50 |
|
willow |
Salix spp. |
50 |
|
torpedograss |
Panicum repens |
50 |
|
cat-tail |
Typha spp. |
30 |
|
water-pennywort |
Hydrocotyle umbellata |
30 |
|
maidencane |
Panicum hemitomon |
20 |
|
smartweed |
Polygonum hydropiperoides |
10 |
|
baby-tears |
Micranthemum umbrosum |
10 |
|
tapegrass |
Vallisneria americana |
10 |