Brant (Hillsborough County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°7'35", Longitude 82°28'17"
Period of record: 114 sampling dates; August 20, 1990 to December 14, 1999
Surface area (Shafer et al. 1986): 60 acres / 24 hectacres
Lake Region (Griffith et al. 1997): Land-O-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Supplemental, unpublished water chemistry data, University of Florida.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 3 months sampled:
|
pH |
6.7 |
Sulfate (mg/L) |
12.6 |
|
Total alkalinity (mg/L as CaCO3) |
16.6 |
Calcium (mg/L) |
9.2 |
|
Conductance (µS/cm @ 25 °C) |
146 |
Magnesium (mg/L) |
2.6 |
|
Color (Pt-Co units) |
57 |
Sodium (mg/L) |
12.0 |
|
Chloride (mg/L) |
25.6 |
Potassium (mg/L) |
4.1 |
|
Silicon (mg/L) |
0.4 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 114 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
14 |
36 |
79 |
|
Long-term total nitrogen concentrations (µg/L) |
510 |
1070 |
2720 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.7 |
24.6 |
216.0 |
|
Long-term Secchi depth (ft) |
1.0 |
3.6 |
7.8 |
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-15-99 |
47 |
1010 |
19.0 |
3.5 |
|
Feb-20-99 |
48 |
880 |
19.3 |
3.5 |
|
Mar-20-99 |
45 |
940 |
17.3 |
3.5 |
|
Apr-20-99 |
55 |
960 |
27.0 |
3.5 |
|
May-18-99 |
60 |
970 |
21.7 |
3.0 |
|
Jun-15-99 |
43 |
840 |
22.3 |
3.5 |
|
Jul-16-99 |
40 |
810 |
32.3 |
3.0 |
|
Aug-17-99 |
33 |
870 |
21.0 |
3.5 |
|
Sep-23-99 |
32 |
910 |
21.7 |
3.0 |
|
Oct-23-99 |
33 |
890 |
18.3 |
3.5 |
|
Nov-17-99 |
33 |
890 |
19.3 |
3.5 |
|
Dec-14-99 |
32 |
770 |
17.3 |
3.5 |
|
|
|
|
|
|
|
1999 Average |
42 |
900 |
21.4 |
3.4 |
Brant (Hillsborough County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 12, 1992
|
Percent area covered with aquatic vegetation (PAC, %) |
66 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
24 |
|
Average emergent plant biomass (kg wet wt/m2) |
1.5 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.3 |
|
Average submersed plant biomass (kg wet wt/m2) |
3.0 |
|
Average width of emergent and floating-leaved zone (ft.) |
16 |
|
Average lake depth (m) |
1 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
hydrilla |
Hydrilla verticillata |
100 |
|
southern naiad |
Najas guadalupensis |
100 |
|
cat-tail |
Typha spp. |
80 |
|
slender spikerush |
Eleocharis baldwinii |
50 |
|
pickerelweed |
Pontederia cordata |
50 |
|
water-pennywort |
Hydrocotyle umbellata |
50 |
|
tapegrass |
Vallisneria americana |
30 |
|
soft rush |
Juncus effusus |
30 |
|
duck-potato |
Sagittaria lancifolia |
20 |
|
alligator-weed |
Alternanthera philoxeroides |
20 |
|
water primrose |
Ludwigia octovalvis |
20 |
|
willow |
Salix spp. |
20 |
|
maidencane |
Panicum hemitomon |
20 |
|
spatterdock |
Nuphar luteum |
10 |
|
smartweed |
Polygonum hydropiperoides |
10 |
|
dwarf arrowhead |
Sagittaria subulata |
10 |
|
buttonbush |
Cephalanthus occidentalis |
10 |
|
torpedograss |
Panicum repens |
10 |
|
musk-grass |
Chara spp. |
10 |
Brant (Hillsborough County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 25, 1994
|
Percent area covered with aquatic vegetation (PAC, %) |
4 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
2 |
|
Average emergent plant biomass (kg wet wt/m2) |
2.2 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.0 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.0 |
|
Average width of emergent and floating-leaved zone (ft.) |
23 |
|
Average lake depth (m) |
1 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
cat-tail |
Typha spp. |
70 |
|
water-pennywort |
Hydrocotyle umbellata |
60 |
|
melaleuca |
Melaleuca quinquenervia |
30 |
|
duck-potato |
Sagittaria lancifolia |
20 |
|
pickerelweed |
Pontederia cordata |
20 |
|
willow |
Salix spp. |
20 |
|
wax myrtle |
Myrica cerifera |
10 |
|
water primrose |
Ludwigia octovalvis |
10 |
|
torpedograss |
Panicum repens |
10 |
|
bald cypress |
Taxodium distichum |
10 |