Crystal (Clay County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°49'23", Longitude 82°2'32"
Period of record: 127 sampling dates; February 28, 1988 to December 10, 1999
Surface area (LAKEWATCH): 508 acres / 206 hectacres (Bathymetric Map)
Lake Region (Griffith et al. 1997): Trail Ridge
Geologic formation (Brooks 1981):
The geology is dominated by quartz sand and quartzite gravel with sandy clay beds of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Interlachen Sand Hills 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Supplemental, unpublished water chemistry data, University of Florida.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 |
6.8 |
Sulfate (mg/L) |
4.1 |
|
Total alkalinity (mg/L as CaCO3) |
5.7 |
Calcium (mg/L) |
2.5 |
|
Conductance (µS/cm @ 25 °C) |
38 |
Magnesium (mg/L) |
1.0 |
|
Color (Pt-Co units) |
9 |
Sodium (mg/L) |
3.0 |
|
Chloride (mg/L) |
6.3 |
Potassium (mg/L) |
0.0 |
|
Silicon (mg/L) |
5.2 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 127 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
4 |
13 |
23 |
|
Long-term total nitrogen concentrations (µg/L) |
150 |
390 |
790 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
7.7 |
26.0 |
|
Long-term Secchi depth (ft) |
3.0 |
7.3 |
15.7 |
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-10-99 |
12 |
240 |
4.0 |
13.0 |
|
Feb-09-99 |
12 |
290 |
2.3 |
13.8 |
|
Mar-10-99 |
10 |
310 |
1.3 |
10.5 |
|
Apr-02-99 |
10 |
320 |
1.7 |
8.8 |
|
May-11-99 |
12 |
230 |
3.3 |
14.3 |
|
Jun-15-99 |
12 |
270 |
2.3 |
11.8 |
|
Jul-10-99 |
7 |
270 |
2.3 |
11.8 |
|
Aug-09-99 |
7 |
260 |
3.0 |
9.7 |
|
Sep-12-99 |
13 |
300 |
7.0 |
6.0 |
|
Oct-20-99 |
18 |
430 |
11.3 |
5.5 |
|
Nov-18-99 |
19 |
670 |
25.0 |
3.2 |
|
Dec-10-99 |
20 |
790 |
26.0 |
4.0 |
|
|
|
|
|
|
|
1999 Average |
13 |
370 |
7.5 |
9.4 |
Crystal (Clay County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 2, 1998
|
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) |
6.5 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.0 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.4 |
|
Average width of emergent and floating-leaved zone (ft.) |
86 |
|
Average lake depth (m) |
5 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
pickerelweed |
Pontederia cordata |
100 |
|
maidencane |
Panicum hemitomon |
100 |
|
wax myrtle |
Myrica cerifera |
90 |
|
rush fuirena |
Fuirena scirpoidea |
90 |
|
stonewort |
Nitella spp. |
80 |
|
southern cutgrass |
Leersia hexandra |
80 |
|
red ludwigia |
Ludwigia repens |
40 |
|
cat-tail |
Typha spp. |
40 |
|
respuinata bladderwort |
Utricularia resupinata |
40 |
|
St. John's wort |
Hypericum spp. |
30 |
|
leconte sedge |
Cyperus lecontei |
30 |
|
water-pennywort |
Hydrocotyle umbellata |
20 |
|
cone-spur bladderwort |
Utricularia gibba |
20 |
|
slender spikerush |
Eleocharis baldwinii |
10 |
|
water primrose |
Ludwigia octovalvis |
10 |
|
musk-grass |
Chara spp. |
10 |
|
red root |
Lachnanthes caroliniana |
10 |