Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°43'30", Longitude 82°0'37"
Period of record: 30 sampling dates; April 10, 1990 to November 17, 1997
Surface area (LAKEWATCH): 440 acres / 178 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Supplemental, unpublished water chemistry data, University of Florida.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 2 months sampled:
| pH |
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Sulfate (mg/L) |
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| Total alkalinity (mg/L as CaCO3) |
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Calcium (mg/L) |
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| Conductance (µS/cm @ 25 °C) |
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Magnesium (mg/L) |
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| Color (Pt-Co units) |
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Sodium (mg/L) |
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| Chloride (mg/L) |
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Potassium (mg/L) |
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| Silicon (mg/L) |
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Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 30 months sampled:
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| Long-term total phosphorus concentrations (µg/L) |
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| Long-term total nitrogen concentrations (µg/L) |
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| Long-term total chlorophyll concentrations (µg/L) |
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| Long-term Secchi depth (ft) |
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Florida LAKEWATCH data were not collected in 1999.
Swan (Putnam County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 3, 1997
| Percent area covered with aquatic vegetation (PAC, %) |
4
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| Percent of lake's volume filled with vegetation (PVI, %) |
2
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| Average emergent plant biomass (kg wet wt/m2) |
2.6
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| Average floating-leaved plant biomass (kg wet wt/m2) |
1.0
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| Average submersed plant biomass (kg wet wt/m2) |
0.4
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| Average width of emergent and floating-leaved zone (ft.) |
77
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| Average lake depth (m) |
4
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Frequency that plant species occur in 10 evenly spaced transects around the lake.
| Common Name | Plant Species |
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| red ludwigia | Ludwigia repens |
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| rush fuirena | Fuirena scirpoidea |
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| slender spikerush | Eleocharis baldwinii |
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| bog-moss | Mayaca fluviatilis |
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| maidencane | Panicum hemitomon |
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| pickerelweed | Pontederia cordata |
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| torpedograss | Panicum repens |
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| St. John's wort | Hypericum spp. |
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| banana-lily | Nymphoides aquatica |
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| water-pennywort | Hydrocotyle umbellata |
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| southern cutgrass | Leersia hexandra |
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| red root | Lachnanthes caroliniana |
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| wax myrtle | Myrica cerifera |
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| yellow-eyed grass | Xyris spp. |
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| Baldwin flat sedge | Cyperus globulosus |
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| fragrant water-lily | Nymphaea odorata |
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Swan (Putnam County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on June 17, 1998
| Percent area covered with aquatic vegetation (PAC, %) |
18
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| Percent of lake's volume filled with vegetation (PVI, %) |
4
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| Average emergent plant biomass (kg wet wt/m2) |
4.6
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| Average floating-leaved plant biomass (kg wet wt/m2) |
1.2
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| Average submersed plant biomass (kg wet wt/m2) |
0.2
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| Average width of emergent and floating-leaved zone (ft.) |
106
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| Average lake depth (m) |
3
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Frequency that plant species occur in 10 evenly spaced transects around the lake.
| Common Name | Plant Species |
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| rush fuirena | Fuirena scirpoidea |
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| red ludwigia | Ludwigia repens |
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| wax myrtle | Myrica cerifera |
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| slender spikerush | Eleocharis baldwinii |
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| maidencane | Panicum hemitomon |
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| St. John's wort | Hypericum spp. |
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| banana-lily | Nymphoides aquatica |
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| bog-moss | Mayaca fluviatilis |
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| torpedograss | Panicum repens |
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| pickerelweed | Pontederia cordata |
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| leconte sedge | Cyperus lecontei |
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| fragrant water-lily | Nymphaea odorata |
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| water-pennywort | Hydrocotyle umbellata |
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| southern cutgrass | Leersia hexandra |
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| red root | Lachnanthes caroliniana |
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| yellow-eyed grass | Xyris spp. |
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| red maple | Acer rubrum |
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| cat-tail | Typha spp. |
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| salt-bush | Baccharis spp. |
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| buttonbush | Cephalanthus occidentalis |
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