Hiawatha (Leon County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 30°24'36", Longitude 84°20'53"

Period of record: 102 sampling dates; September 16, 1988 to November 15, 1999

Surface area (LAKEWATCH): 37 acres / 15 hectacres     Bathymetric Map

Lake Region (Griffith et al. 1997): Gulf Coast Lowlands

Geologic formation (Brooks 1981):

The geology is a mixture of two major types dominated by deeply weathered beach and dune sand with some clay lenses of the preglacial Pleistocene and phosphatic sand, silty sand, and clay of the Hawthorne Formation.

Physiographic region (Brooks 1981):

The water body lies in the Tallahassee Red Hills subdivision of the State Line Hills division of the Ocala Uplift District.

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 3 months sampled:
 
pH
4.5
 Sulfate (mg/L)
0.3
Total alkalinity (mg/L as CaCO3)
0.0
 Calcium (mg/L)
0.4
Conductance (µS/cm @ 25 °C)
31
 Magnesium (mg/L)
0.1
Color (Pt-Co units)
134
 Sodium (mg/L)
2.1
Chloride (mg/L)
6.0
 Potassium (mg/L)
0.0
Silicon (mg/L)
3.6
    

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 102 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
6
15
42
Long-term total nitrogen concentrations (µg/L)
240
560
1100
Long-term total chlorophyll concentrations (µg/L)
1.0
7.1
22.0
Long-term Secchi depth (ft)
1.1
3.1
7.0

1999 Florida LAKEWATCH Data

Numbers reported below are monthly averages calculated from 2 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-31-99
17
550
11.0
3.2
Feb-28-99
18
510
5.0
3.1
Mar-21-99
16
480
5.5
4.0
Apr-21-99
22
490
2.5
4.0
Jun-23-99
18
560
2.5
4.8
Aug-29-99
14
440
5.0
7.0
Sep-26-99
12
460
5.5
5.5
Oct-19-99
42
650
3.0
4.0
Nov-15-99
18
570
8.5
4.0
         
1999 Average
20
520
5.4
4.4

Hiawatha (Leon County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 15, 1993

Percent area covered with aquatic vegetation (PAC, %)
12
Percent of lake's volume filled with vegetation (PVI, %)
4
Average emergent plant biomass (kg wet wt/m2)
8.1
Average floating-leaved plant biomass (kg wet wt/m2)
0.0
Average submersed plant biomass (kg wet wt/m2)
2.8
Average width of emergent and floating-leaved zone (ft.)
44
Average lake depth (m)
1

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

Common Name Plant Species
Frequency (%)
southern cutgrass Leersia hexandra
90
slender spikerush Eleocharis baldwinii
80
maidencane Panicum hemitomon
80
swamp titi Cyrilla racemiflora
70
bald cypress Taxodium distichum
50
buttonbush Cephalanthus occidentalis
30
water-moss Fontinalis spp.
10
willow Salix spp.
10
para grass Brachiaria mutica
10
creeping rush Juncus repens
10
sphaghum moss Sphaghum spp.
10

Hiawatha (Leon County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 29, 1999

Percent area covered with aquatic vegetation (PAC, %)
24
Percent of lake's volume filled with vegetation (PVI, %)
11
Average emergent plant biomass (kg wet wt/m2)
10.3
Average floating-leaved plant biomass (kg wet wt/m2)
0.0
Average submersed plant biomass (kg wet wt/m2)
2.2
Average width of emergent and floating-leaved zone (ft.)
27
Average lake depth (m)
1

Frequency that plant species occur in 5 evenly spaced transects around the lake.

Common Name Plant Species
Frequency (%)
buttonbush Cephalanthus occidentalis
100
maidencane Panicum hemitomon
100
bald cypress Taxodium distichum
100
slender spikerush Eleocharis baldwinii
80
southern cutgrass Leersia hexandra
80
swamp titi Cyrilla racemiflora
60
common salvinia Salvinia rotundifolia
20
fragrant water-lily Nymphaea odorata
20
water-moss Fontinalis spp.
20
red maple Acer rubrum
20

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