Gatlin (Orange County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 28°29'30", Longitude 81°22'7"

Period of record: 57 sampling dates; April 22, 1995 to December 16, 1999

Surface area (LAKEWATCH): 215 acres / 87 hectacres     Bathymetric Map

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.

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 57 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
11
21
37
Long-term total nitrogen concentrations (µg/L)
760
1120
1610
Long-term total chlorophyll concentrations (µg/L)
13.7
33.8
78.0
Long-term Secchi depth (ft)
1.0
2.5
5.0

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-16-99
28
1350
58.3
1.0
Feb-22-99
27
1050
35.7
1.5
Mar-13-99
23
1160
32.3
1.5
Apr-14-99
22
1190
29.7
1.0
May-16-99
21
1120
31.3
2.0
Jun-28-99
17
1070
22.7
3.5
Jul-25-99
13
940
18.0
3.7
Aug-29-99
12
950
16.7
3.3
Sep-18-99
17
1130
31.7
3.5
Oct-25-99
24
1510
46.7
2.0
Nov-11-99
22
1470
58.7
2.0
Dec-16-99
31
1550
60.0
2.0
         
1999 Average
21
1210
36.8
2.2

Gatlin (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 16, 1999

Percent area covered with aquatic vegetation (PAC, %)
33
Percent of lake's volume filled with vegetation (PVI, %)
10
Average emergent plant biomass (kg wet wt/m2)
3.2
Average floating-leaved plant biomass (kg wet wt/m2)
2.3
Average submersed plant biomass (kg wet wt/m2)
4.8
Average width of emergent and floating-leaved zone (ft.)
41
Average lake depth (m)
4

Frequency that plant species occur in 10 evenly spaced transects around the lake.

Common Name Plant Species
Frequency (%)
fragrant water-lily Nymphaea odorata
90
torpedograss Panicum repens
70
tapegrass Vallisneria americana
60
water primrose Ludwigia octovalvis
60
cat-tail Typha spp.
50
water-pennywort Hydrocotyle umbellata
40
duck-potato Sagittaria lancifolia
20
spatterdock Nuphar luteum
20
dwarf arrowhead Sagittaria subulata
20
southern naiad Najas guadalupensis
20
elephant-ear Colocasia esculenta
20
willow Salix spp.
20
pickerelweed Pontederia cordata
10
giant bulrush Scirpus californicus
10
stonewort Nitella spp.
10
rush fuirena Fuirena scirpoidea
10
St. John's wort Hypericum spp.
10
jointed flat sedge Cyperus haspan
10

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