Crooked (Lake County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 29°9'10", Longitude 81°36'10"

Period of record: 116 sampling dates; April 25, 1990 to December 27, 1999

Surface area (LAKEWATCH): 31 acres / 13 hectacres    (Bathymetric Map)

Lake Region (Griffith et al. 1997): Ocala Scrub

Geologic formation (Brooks 1981):

The geology is dominated by sand dunes and well sorted fine sand of the Pleistocene.

Physiographic region (Brooks 1981):

The water body lies in the Ocala Scrub division of the Central Lake District.

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 6 months sampled:
 
pH
5.1
 Sulfate (mg/L)
5.7
Total alkalinity (mg/L as CaCO3)
4.2
 Calcium (mg/L)
1.6
Conductance (µS/cm @ 25 °C)
49
 Magnesium (mg/L)
1.4
Color (Pt-Co units)
8
 Sodium (mg/L)
3.9
Chloride (mg/L)
7.9
 Potassium (mg/L)
0.3

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 116 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
5
18
32
Long-term total nitrogen concentrations (µg/L)
200
810
1380
Long-term total chlorophyll concentrations (µg/L)
2.0
10.6
36.0
Long-term Secchi depth (ft)
2.5
5.2
11.0

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-21-99
11
600
3.3
8.0
Feb-22-99
14
560
7.7
4.5
Mar-16-99
16
700
6.0
5.0
Apr-27-99
13
670
5.7
6.5
May-27-99
14
690
4.7
6.3
Jun-24-99
13
640
8.7
6.5
Jul-26-99
15
800
5.7
6.5
Aug-10-99
17
630
6.3
5.5
Sep-22-99
15
740
8.7
6.0
Oct-20-99
23
860
27.7
6.5
Nov-16-99
15
690
7.7
7.3
Dec-27-99
17
710
12.0
4.7
         
1999 Average
15
690
8.7
6.1

Crooked (Lake County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 24, 1993

Percent area covered with aquatic vegetation (PAC, %)
24
Percent of lake's volume filled with vegetation (PVI, %)
7
Average emergent plant biomass (kg wet wt/m2)
3.8
Average floating-leaved plant biomass (kg wet wt/m2)
1.4
Average submersed plant biomass (kg wet wt/m2)
2.6
Average width of emergent and floating-leaved zone (ft.)
25
Average lake depth (m)
2

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

Common Name Plant Species
Frequency (%)
spatterdock Nuphar luteum
100
red root Lachnanthes caroliniana
100
water-pennywort Hydrocotyle umbellata
80
maidencane Panicum hemitomon
80
southern cutgrass Leersia hexandra
80
red ludwigia Ludwigia repens
40
slender spikerush Eleocharis baldwinii
30
para grass Brachiaria mutica
30
salt-bush Baccharis spp.
20
musk-grass Chara spp.
20
rush Juncus marginatus
20
buttonbush Cephalanthus occidentalis
10
rush fuirena Fuirena scirpoidea
10
St. John's wort Hypericum spp.
10
rush spp. Juncus dichotomus
10

Crooked (Lake County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 4, 1998

Percent area covered with aquatic vegetation (PAC, %)
36
Percent of lake's volume filled with vegetation (PVI, %)
12
Average emergent plant biomass (kg wet wt/m2)
5.0
Average floating-leaved plant biomass (kg wet wt/m2)
2.9
Average submersed plant biomass (kg wet wt/m2)
0.8
Average width of emergent and floating-leaved zone (ft.)
45
Average lake depth (m)
2

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

Common Name Plant Species
Frequency (%)
maidencane Panicum hemitomon
100
slender spikerush Eleocharis baldwinii
90
banana-lily Nymphoides aquatica
90
red ludwigia Ludwigia repens
90
spatterdock Nuphar luteum
80
southern cutgrass Leersia hexandra
60
water-pennywort Hydrocotyle umbellata
50
wax myrtle Myrica cerifera
50
buttonbush Cephalanthus occidentalis
50
purple bladderwort Utricularia purpurea
40
rush fuirena Fuirena scirpoidea
40
bladderwort Utricularia foliosa
40
bog-moss Mayaca fluviatilis
30
red root Lachnanthes caroliniana
30
salt-bush Baccharis spp.
10
sawgrass Cladium jamaicense
10
para grass Brachiaria mutica
10
pipewort Eriocaulon spp.
10
St. John's wort Hypericum spp.
10
water spikerush Eleocharis elongata
10

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