Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°11'40", Longitude 81°28'16"
Period of record: 99 sampling dates; June 27, 1990 to July 12, 1999
Surface area (LAKEWATCH): 82 acres / 33 hectacres Bathymetric Map
Lake Region (Griffith et al. 1997): Crescent City/DeLand Ridges
Geologic formation (Brooks 1981):
The geology is dominated by dune sand and shell with silty sand, silt, and clay of the Princess Ann Formation.
Physiographic region (Brooks 1981):
The water body lies in the St. John’s Offset division of the Central Lake District.
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 99 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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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:
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Emporia (Volusia County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 28, 1992
| Percent area covered with aquatic vegetation (PAC, %) |
10
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| Percent of lake's volume filled with vegetation (PVI, %) |
1
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| Average emergent plant biomass (kg wet wt/m2) |
6.3
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| Average floating-leaved plant biomass (kg wet wt/m2) |
0.8
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| Average submersed plant biomass (kg wet wt/m2) |
1.2
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| Average width of emergent and floating-leaved zone (ft.) |
37
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| Average lake depth (m) |
2
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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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| cat-tail | Typha spp. |
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| southern naiad | Najas guadalupensis |
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| water-pennywort | Hydrocotyle umbellata |
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| torpedograss | Panicum repens |
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| maidencane | Panicum hemitomon |
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| pickerelweed | Pontederia cordata |
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| rush fuirena | Fuirena scirpoidea |
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| slender spikerush | Eleocharis baldwinii |
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| water primrose | Ludwigia octovalvis |
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| St. John's wort | Hypericum spp. |
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| spatterdock | Nuphar luteum |
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| fragrant water-lily | Nymphaea odorata |
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| smartweed | Polygonum hydropiperoides |
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| willow | Salix spp. |
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| flat-sedge | Cyperus odoratus |
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| soft rush | Juncus effusus |
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| musk-grass | Chara spp. |
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| pipewort | Eriocaulon spp. |
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| rush spp. | Juncus dichotomus |
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Emporia (Volusia County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on July 1, 1999
| Percent area covered with aquatic vegetation (PAC, %) |
36
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| Percent of lake's volume filled with vegetation (PVI, %) |
12
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| Average emergent plant biomass (kg wet wt/m2) |
2.4
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| Average floating-leaved plant biomass (kg wet wt/m2) |
2.7
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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.) |
65
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| Average lake depth (m) |
2
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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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| cat-tail | Typha spp. |
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| torpedograss | Panicum repens |
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| spatterdock | Nuphar luteum |
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| water primrose | Ludwigia octovalvis |
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| fragrant water-lily | Nymphaea odorata |
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| buttonbush | Cephalanthus occidentalis |
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| wax myrtle | Myrica cerifera |
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| rush fuirena | Fuirena scirpoidea |
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| red maple | Acer rubrum |
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| maidencane | Panicum hemitomon |
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| water-pennywort | Hydrocotyle umbellata |
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| slender spikerush | Eleocharis baldwinii |
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| pickerelweed | Pontederia cordata |
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| elephant-ear | Colocasia esculenta |
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| green algae | Chlorphyta |
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| jointed flat sedge | Cyperus haspan |
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| musk-grass | Chara spp. |
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| St. John's wort | Hypericum spp. |
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