Ola (Orange County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 28°45'14", Longitude 81°38'5"

Period of record: 107 sampling dates; October 7, 1990 to December 11, 1999

Surface area (LAKEWATCH): 446 acres / 180 hectacres     Bathymetric Maps

Lake Region (Griffith et al. 1997): Apopka Upland

Geologic formation (Brooks 1981):

The geology is a mixture of two major types dominated by phosphatic sand, silty sand, and clay and quartz sand and quartzite gravel with sandy clay beds of the Hawthorne Formation.

Physiographic region (Brooks 1981):

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

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 4 months sampled:
 
pH
7.4
 Sulfate (mg/L)
47.8
Total alkalinity (mg/L as CaCO3)
26.8
 Calcium (mg/L)
15.9
Conductance (µS/cm @ 25 °C)
287
 Magnesium (mg/L)
10.4
Color (Pt-Co units)
7
 Sodium (mg/L)
13.9
Chloride (mg/L)
31.8
 Potassium (mg/L)
11.0
Silicon (mg/L)
0.6
    

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 107 months sampled:

 
Minimum
Average
Maximum
Long-term total phosphorus concentrations (µg/L)
7
11
18
Long-term total nitrogen concentrations (µg/L)
420
550
800
Long-term total chlorophyll concentrations (µg/L)
1.0
3.6
13.3
Long-term Secchi depth (ft)
8.6
13.3
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-16-99
11
540
3.0
17.0
Feb-14-99
12
650
6.0
11.9
Mar-13-99
14
530
5.0
13.4
Apr-10-99
13
550
6.0
8.8
May-15-99
13
590
4.3
12.3
Jun-12-99
13
560
4.3
12.0
Jul-11-99
12
510
3.3
14.2
Aug-18-99
14
530
5.7
9.7
Oct-18-99
15
800
5.0
10.8
Nov-14-99
15
650
7.3
9.3
Dec-11-99
18
710
6.3
12.1
         
1999 Average
14
600
5.1
12.0

Ola (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on June 2, 1992

Percent area covered with aquatic vegetation (PAC, %)
60
Percent of lake's volume filled with vegetation (PVI, %)
18
Average emergent plant biomass (kg wet wt/m2)
3.7
Average floating-leaved plant biomass (kg wet wt/m2)
3.3
Average submersed plant biomass (kg wet wt/m2)
8.4
Average width of emergent and floating-leaved zone (ft.)
53
Average lake depth (m)
4

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

Common Name Plant Species
Frequency (%)
tapegrass Vallisneria americana
90
maidencane Panicum hemitomon
90
cat-tail Typha spp.
80
hydrilla Hydrilla verticillata
70
pickerelweed Pontederia cordata
60
lemon bacopa Bacopa caroliniana
60
musk-grass Chara spp.
60
coontail Ceratophyllum demersum
50
fragrant water-lily Nymphaea odorata
40
rush fuirena Fuirena scirpoidea
40
water-pennywort Hydrocotyle umbellata
30
floating water-hyacinth Eichhornia crassipes
20
sawgrass Cladium jamaicense
20
spatterdock Nuphar luteum
10
dwarf arrowhead Sagittaria subulata
10
water primrose Ludwigia octovalvis
10
torpedograss Panicum repens
10
southern cutgrass Leersia hexandra
10
water hemlock Cicuta mexicana
10

Ola (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on November 17, 1993

Percent area covered with aquatic vegetation (PAC, %)
96
Percent of lake's volume filled with vegetation (PVI, %)
23
Average emergent plant biomass (kg wet wt/m2)
9.4
Average floating-leaved plant biomass (kg wet wt/m2)
7.2
Average submersed plant biomass (kg wet wt/m2)
8.7
Average width of emergent and floating-leaved zone (ft.)
53
Average lake depth (m)
3

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

Common Name Plant Species
Frequency (%)
hydrilla Hydrilla verticillata
100
tapegrass Vallisneria americana
100
pickerelweed Pontederia cordata
70
coontail Ceratophyllum demersum
70
purple bladderwort Utricularia purpurea
70
southern naiad Najas guadalupensis
70
stonewort Nitella spp.
70
cat-tail Typha spp.
60
water primrose Ludwigia octovalvis
60
bacopa Bacopa monnieri
50
maidencane Panicum hemitomon
50
sawgrass Cladium jamaicense
40
torpedograss Panicum repens
40
rush fuirena Fuirena scirpoidea
30
respuinata bladderwort Utricularia resupinata
30
floating water-hyacinth Eichhornia crassipes
20
slender spikerush Eleocharis baldwinii
20
fragrant water-lily Nymphaea odorata
20
water-pennywort Hydrocotyle umbellata
20
wax myrtle Myrica cerifera
20
. Nitella prolonga
20
common salvinia Salvinia rotundifolia
10
spatterdock Nuphar luteum
10
dwarf arrowhead Sagittaria subulata
10
cone-spur bladderwort Utricularia gibba
10
big floating bladderwort Utricularia inflata
10
elephant-ear Colocasia esculenta
10
willow Salix spp.
10
pipewort Eriocaulon spp.
10
giant spikerush Eleocharis interstincta
10

Ola (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on September 11, 1996

Percent area covered with aquatic vegetation (PAC, %)
96
Percent of lake's volume filled with vegetation (PVI, %)
22
Average emergent plant biomass (kg wet wt/m2)
16.1
Average floating-leaved plant biomass (kg wet wt/m2)
8.8
Average submersed plant biomass (kg wet wt/m2)
7.3
Average width of emergent and floating-leaved zone (ft.)
112
Average lake depth (m)
3

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

Common Name Plant Species
Frequency (%)
coontail Ceratophyllum demersum
90
water primrose Ludwigia octovalvis
90
cat-tail Typha spp.
80
hydrilla Hydrilla verticillata
70
tapegrass Vallisneria americana
70
stonewort Nitella spp.
70
pickerelweed Pontederia cordata
60
willow Salix spp.
60
torpedograss Panicum repens
60
wax myrtle Myrica cerifera
50
floating water-hyacinth Eichhornia crassipes
40
southern naiad Najas guadalupensis
40
rush fuirena Fuirena scirpoidea
40
fragrant water-lily Nymphaea odorata
30
maidencane Panicum hemitomon
30
water-pennywort Hydrocotyle umbellata
20
musk-grass Chara spp.
20
giant spikerush Eleocharis interstincta
20
smartweed Polygonum hydropiperoides
10
bacopa Bacopa monnieri
10
dwarf arrowhead Sagittaria subulata
10
elephant-ear Colocasia esculenta
10
salt-bush Baccharis spp.
10
elderberry Sambucus canadensis
10
. Nitella prolonga
10

Ola (Orange County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 27, 1999

Percent area covered with aquatic vegetation (PAC, %)
94
Percent of lake's volume filled with vegetation (PVI, %)
14
Average emergent plant biomass (kg wet wt/m2)
5.3
Average floating-leaved plant biomass (kg wet wt/m2)
1.8
Average submersed plant biomass (kg wet wt/m2)
4.1
Average width of emergent and floating-leaved zone (ft.)
50
Average lake depth (m)
4

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

Common Name Plant Species
Frequency (%)
pickerelweed Pontederia cordata
90
cat-tail Typha spp.
90
coontail Ceratophyllum demersum
80
water primrose Ludwigia octovalvis
80
stonewort Nitella spp.
80
torpedograss Panicum repens
70
tapegrass Vallisneria americana
60
lemon bacopa Bacopa caroliniana
50
southern naiad Najas guadalupensis
50
wax myrtle Myrica cerifera
50
maidencane Panicum hemitomon
50
fragrant water-lily Nymphaea odorata
40
red maple Acer rubrum
40
water-pennywort Hydrocotyle umbellata
30
purple bladderwort Utricularia purpurea
30
willow Salix spp.
30
floating water-hyacinth Eichhornia crassipes
20
common salvinia Salvinia rotundifolia
20
slender spikerush Eleocharis baldwinii
20
hydrilla Hydrilla verticillata
20
sawgrass Cladium jamaicense
20
bald cypress Taxodium distichum
20
duck-potato Sagittaria lancifolia
10
alligator-weed Alternanthera philoxeroides
10
spatterdock Nuphar luteum
10
dwarf arrowhead Sagittaria subulata
10
elephant-ear Colocasia esculenta
10
Australian pine Casuarina equisetifolia
10
soft stem bulrush Scirpus validus
10
musk-grass Chara spp.
10
rush fuirena Fuirena scirpoidea
10
respuinata bladderwort Utricularia resupinata
10
elderberry Sambucus canadensis
10
. Nitella prolonga
10
giant spikerush Eleocharis interstincta
10
sweetbay Magnolia virginiana
10

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