Hill (Highlands County)

Hill (Highlands County)

Florida LAKEWATCH Water Chemistry Summary

Location: Latitude 27°20'59", Longitude 81°26'18"

Period of record: 20 sampling dates; September 29, 1995 to November 2, 1999

Surface area (LAKEWATCH): 74 acres / 30 hectacres Bathymetric Map

Lake Region (Griffith et al. 1997): Lake Wales Ridge Transition

Geologic formation (Brooks 1981):

The geology is dominated by deeply weathered beach and dune sand with some clay lenses of the preglacial Pleistocene.

Physiographic region (Brooks 1981):

The water body lies in the Eastern Complex of the Central Ridge subdivision of the Lake Wales Ridge division of the Central Lake District.

Supplemental, unpublished water chemistry data, University of Florida.

Numbers reported below are the average for 1 month sampled:

pH 5.6 Sulfate (mg/L) 6.2

Total alkalinity (mg/L as CaCO₃) 0.3 Calcium (mg/L) 2.7

Conductance (µS/cm @ 25 °C) 50 Magnesium (mg/L) 0.8

Color (Pt-Co units) 13 Sodium (mg/L) 4.9

Chloride (mg/L) 10.1 Potassium (mg/L) 0.4

Silicon (mg/L) 0.3

Long-term Florida LAKEWATCH Data

Numbers reported below are the minimum, average, and maximum value for the 20 months sampled:

	Minimum	Average	Maximum
Long-term total phosphorus concentrations (µg/L)	6	10	21
Long-term total nitrogen concentrations (µg/L)	210	340	540
Long-term total chlorophyll concentrations (µg/L)	2.0	5.1	9.3
Long-term Secchi depth (ft)	3.0	6.8	9.3

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
Mar-11-99	10	320	3.7	5.3
Nov-02-99	8	310	5.0	8.0

1999 Average	9	320	4.3	6.7

Hill (Highlands County)

Florida LAKEWATCH Aquatic Plant Summary

Aquatic plant data collected on July 10, 1996

Percent area covered with aquatic vegetation (PAC, %)	29
Percent of lake's volume filled with vegetation (PVI, %)	6
Average emergent plant biomass (kg wet wt/m2)	0.5
Average floating-leaved plant biomass (kg wet wt/m2)	0.7
Average submersed plant biomass (kg wet wt/m2)	2.0
Average width of emergent and floating-leaved zone (ft.)	71
Average lake depth (m)	3

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

Common Name	Plant Species	Frequency (%)
variable-leaf milfoil	Myriophyllum heterophyllum	90
rush fuirena	Fuirena scirpoidea	90
purple bladderwort	Utricularia purpurea	70
maidencane	Panicum hemitomon	70
banana-lily	Nymphoides aquatica	60
red ludwigia	Ludwigia repens	60
St. John's wort	Hypericum spp.	60
red root	Lachnanthes caroliniana	60
sedge spp.	Cyperus spp.	50
spatterdock	Nuphar luteum	40
torpedograss	Panicum repens	40
jointed flat sedge	Cyperus haspan	40
wax myrtle	Myrica cerifera	30
slender spikerush	Eleocharis baldwinii	20
southern cutgrass	Leersia hexandra	20
respuinata bladderwort	Utricularia resupinata	20
water-pennywort	Hydrocotyle umbellata	10
water-moss	Fontinalis spp.	10
cone-spur bladderwort	Utricularia gibba	10
willow	Salix spp.	10
para grass	Brachiaria mutica	10
Tracy's beak-rush	Rhynchospora tracyi	10
yellow-eyed grass	Xyris spp.	10
bald cypress	Taxodium distichum	10

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pH	5.6	Sulfate (mg/L)	6.2
Total alkalinity (mg/L as CaCO₃)	0.3	Calcium (mg/L)	2.7
Conductance (µS/cm @ 25 °C)	50	Magnesium (mg/L)	0.8
Color (Pt-Co units)	13	Sodium (mg/L)	4.9
Chloride (mg/L)	10.1	Potassium (mg/L)	0.4
Silicon (mg/L)	0.3