Asbury South (Clay County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 30°2'52", Longitude 81°49'15"
Period of record: 65 sampling dates; May 26, 1993 to October 24, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Eastern Flatlands
Geologic formation (Brooks 1981):
The geology is dominated by Jacksonville Limestone, sandy to clayey nonphosphatic, soft to very hard limestone, moldic where fossil beds are associated with medium to coarse sand.
Physiographic region (Brooks 1981):
The water body lies in the Black Creek Basin subdivision of the Duval Upland division of the Sea Island District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 2 months sampled:
|
pH |
7.7 |
Sulfate (mg/L) |
4.6 |
|
Total alkalinity (mg/L as CaCO3) |
27.0 |
Calcium (mg/L) |
8.6 |
|
Conductance (µS/cm @ 25 °C) |
98 |
Magnesium (mg/L) |
2.0 |
|
Color (Pt-Co units) |
9 |
Sodium (mg/L) |
6.6 |
|
Chloride (mg/L) |
11.5 |
Potassium (mg/L) |
0.3 |
|
Silicon (mg/L) |
0.8 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 65 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
8 |
16 |
33 |
|
Long-term total nitrogen concentrations (µg/L) |
270 |
450 |
920 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.7 |
8.0 |
27.0 |
|
Long-term Secchi depth (ft) |
2.0 |
8.2 |
18.0 |
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-19-99 |
15 |
450 |
7.7 |
7.6 |
|
Feb-22-99 |
17 |
480 |
9.3 |
6.8 |
|
Mar-19-99 |
17 |
490 |
10.0 |
7.0 |
|
Apr-18-99 |
21 |
390 |
10.0 |
7.0 |
|
May-16-99 |
18 |
310 |
7.3 |
6.2 |
|
Jun-19-99 |
17 |
400 |
11.0 |
6.5 |
|
Jul-18-99 |
15 |
520 |
6.0 |
6.7 |
|
Aug-28-99 |
15 |
390 |
. |
9.7 |
|
Oct-24-99 |
17 |
540 |
12.0 |
7.7 |
|
|
|
|
|
|
|
1999 Average |
17 |
440 |
9.2 |
7.2 |
Asbury South (Clay County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on September 22, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
56 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
7 |
|
Average emergent plant biomass (kg wet wt/m2) |
6.8 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.9 |
|
Average submersed plant biomass (kg wet wt/m2) |
11.4 |
|
Average width of emergent and floating-leaved zone (ft.) |
39 |
|
Average lake depth (m) |
4 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
stonewort |
Nitella spp. |
90 |
|
hydrilla |
Hydrilla verticillata |
80 |
|
southern naiad |
Najas guadalupensis |
80 |
|
torpedograss |
Panicum repens |
60 |
|
spatterdock |
Nuphar luteum |
40 |
|
tapegrass |
Vallisneria americana |
40 |
|
alligator-weed |
Alternanthera philoxeroides |
20 |
|
elephant-ear |
Colocasia esculenta |
20 |
|
wax myrtle |
Myrica cerifera |
20 |
|
buttonbush |
Cephalanthus occidentalis |
20 |
|
slender spikerush |
Eleocharis baldwinii |
10 |
|
water-pennywort |
Hydrocotyle umbellata |
10 |
|
cone-spur bladderwort |
Utricularia gibba |
10 |
|
water primrose |
Ludwigia octovalvis |
10 |
|
musk-grass |
Chara spp. |
10 |
|
rush fuirena |
Fuirena scirpoidea |
10 |
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