Halfmoon (Hillsborough County)

Halfmoon (Hillsborough County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 28°5'47", Longitude 82°32'51"

Period of record: 19 sampling dates; May 9, 1992 to October 6, 1994

Surface area (Shafer et al. 1986): 32 acres / 13 hectacres

Lake Region (Griffith et al. 1997): Keystone Lakes

Geologic formation (Brooks 1981):

The geology is dominated by argillaceous to sandy impure limestone of the Tampa Formation.

Physiographic region (Brooks 1981):

The water body lies in the Land-O-Lakes subdivision of the Tampa Plain division of the Ocala Uplift District.

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 1 month sampled:

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 19 months sampled:

	Minimum	Average	Maximum
Long-term total phosphorus concentrations (µg/L)	11	15	18
Long-term total nitrogen concentrations (µg/L)	460	560	670
Long-term total chlorophyll concentrations (µg/L)	2.0	6.4	15.0
Long-term Secchi depth (ft)	6.0	6.9	7.6

Florida LAKEWATCH data were not collected in 1999.

Halfmoon (Hillsborough County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 28, 1993

Percent area covered with aquatic vegetation (PAC, %)	60
Percent of lake's volume filled with vegetation (PVI, %)	6
Average emergent plant biomass (kg wet wt/m2)	3.4
Average floating-leaved plant biomass (kg wet wt/m2)	0.3
Average submersed plant biomass (kg wet wt/m2)	1.7
Average width of emergent and floating-leaved zone (ft.)	7
Average lake depth (m)	2

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