Rosa (Putnam County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 29°42'40", Longitude 82°0'34"

Period of record: 111 sampling dates; March 4, 1990 to December 4, 1999

Surface area (LAKEWATCH): 127 acres / 52 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Supplemental, unpublished water chemistry data, University of Florida.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 3 months sampled:
 
pH
5.2
 Sulfate (mg/L)
5.8
Total alkalinity (mg/L as CaCO3)
0.0
 Calcium (mg/L)
1.1
Conductance (µS/cm @ 25 °C)
45
 Magnesium (mg/L)
1.0
Color (Pt-Co units)
4
 Sodium (mg/L)
4.1
Chloride (mg/L)
7.3
 Potassium (mg/L)
0.2
Silicon (mg/L)
0.7
    

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 111 months sampled:


 
 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
3
7
29
Long-term total nitrogen concentrations (µg/L)
40
120
250
Long-term total chlorophyll concentrations (µg/L)
1.0
4.2
42.7
Long-term Secchi depth (ft)
6.8
16.7
25.7

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-09-99
8
160
2.7
8.7
Feb-06-99
6
120
2.0
18.3
Mar-13-99
8
130
2.0
11.3
Apr-03-99
4
120
1.0
18.7
May-01-99
6
100
2.0
19.3
Jun-04-99
4
120
1.0
22.0
Jul-03-99
5
130
3.7
21.5
Aug-07-99
6
170
1.3
23.0
Sep-04-99
6
140
2.0
17.3
Oct-03-99
6
140
2.0
16.7
Nov-06-99
8
170
3.0
8.0
Dec-04-99
9
220
2.7
6.8
         
1999 Average
6
140
2.1
16.0

 

Rosa (Putnam County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on August 19, 1993

Percent area covered with aquatic vegetation (PAC, %)
2
Percent of lake's volume filled with vegetation (PVI, %)
0
Average emergent plant biomass (kg wet wt/m2)
0.9
Average floating-leaved plant biomass (kg wet wt/m2)
0.0
Average submersed plant biomass (kg wet wt/m2)
0.2
Average width of emergent and floating-leaved zone (ft.)
2
Average lake depth (m)
6

 

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

Common Name Plant Species
Frequency (%)
slender spikerush Eleocharis baldwinii
100
yellow-eyed grass Xyris spp.
80
jointed flat sedge Cyperus haspan
80
rush fuirena Fuirena scirpoidea
70
Tracy's beak-rush Rhynchospora tracyi
20
dwarf arrowhead Sagittaria subulata
10
maidencane Panicum hemitomon
10
southern cutgrass Leersia hexandra
10
red root Lachnanthes caroliniana
10
knot grass Paspalum distichum
10

 

Rosa (Putnam County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 17, 1998

Percent area covered with aquatic vegetation (PAC, %)
20
Percent of lake's volume filled with vegetation (PVI, %)
3
Average emergent plant biomass (kg wet wt/m2)
4.0
Average floating-leaved plant biomass (kg wet wt/m2)
2.5
Average submersed plant biomass (kg wet wt/m2)
0.2
Average width of emergent and floating-leaved zone (ft.)
41
Average lake depth (m)
7

 

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

Common Name Plant Species
Frequency (%)
red ludwigia Ludwigia repens
100
maidencane Panicum hemitomon
100
rush fuirena Fuirena scirpoidea
100
southern cutgrass Leersia hexandra
80
wax myrtle Myrica cerifera
70
water-pennywort Hydrocotyle umbellata
60
leconte sedge Cyperus lecontei
60
St. John's wort Hypericum spp.
50
yellow-eyed grass Xyris spp.
50
fragrant water-lily Nymphaea odorata
40
red root Lachnanthes caroliniana
40
slender spikerush Eleocharis baldwinii
30
water-moss Fontinalis spp.
20
spatterdock Nuphar luteum
10
torpedograss Panicum repens
10
pipewort Eriocaulon spp.
10
sweetbay Magnolia virginiana
10
red maple Acer rubrum
10

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