Rochelle (Polk County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°4'19", Longitude 81°43'21"
Period of record: 45 sampling dates; December 1, 1990 to December 15, 1999
Surface area (Shafer et al. 1986): 578 acres / 234 hectacres
Lake Region (Griffith et al. 1997): Southwestern Flatlands
Geologic formation (Brooks 1981):
The geology is dominated by deeply weathered clayey sand and granular sand of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Winter Haven Karst division of the Central Lake District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 3 months sampled:
|
pH |
8.5 |
Sulfate (mg/L) |
20.3 |
|
Total alkalinity (mg/L as CaCO3) |
44.3 |
Calcium (mg/L) |
6.7 |
|
Conductance (µS/cm @ 25 °C) |
280 |
Magnesium (mg/L) |
7.5 |
|
Color (Pt-Co units) |
51 |
Sodium (mg/L) |
32.0 |
|
Chloride (mg/L) |
41.2 |
Potassium (mg/L) |
10.0 |
|
Silicon (mg/L) |
2.3 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 45 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
40 |
91 |
237 |
|
Long-term total nitrogen concentrations (µg/L) |
770 |
1070 |
1580 |
|
Long-term total chlorophyll concentrations (µg/L) |
8.7 |
37.4 |
75.7 |
|
Long-term Secchi depth (ft) |
1.7 |
2.8 |
5.0 |
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-26-99 |
47 |
820 |
26.3 |
2.6 |
|
Feb-26-99 |
46 |
890 |
30.0 |
2.7 |
|
Mar-25-99 |
40 |
1090 |
28.7 |
2.9 |
|
Apr-26-99 |
52 |
1150 |
33.3 |
2.5 |
|
May-26-99 |
60 |
1120 |
40.3 |
3.0 |
|
Jun-13-99 |
63 |
960 |
36.3 |
2.9 |
|
Jul-16-99 |
59 |
1120 |
53.0 |
2.4 |
|
Aug-06-99 |
52 |
1120 |
57.7 |
2.6 |
|
Sep-30-99 |
49 |
970 |
25.7 |
3.8 |
|
Oct-12-99 |
50 |
970 |
31.0 |
3.4 |
|
Nov-15-99 |
51 |
940 |
31.3 |
3.1 |
|
Dec-15-99 |
48 |
1060 |
45.7 |
2.7 |
|
|
|
|
|
|
|
1999 Average |
51 |
1020 |
36.6 |
2.9 |
Rochelle (Polk County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 19, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
2 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
0 |
|
Average emergent plant biomass (kg wet wt/m2) |
5.0 |
|
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.) |
59 |
|
Average lake depth (m) |
3 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
cat-tail |
Typha spp. |
100 |
|
water primrose |
Ludwigia octovalvis |
70 |
|
smartweed |
Polygonum hydropiperoides |
50 |
|
willow |
Salix spp. |
50 |
|
maidencane |
Panicum hemitomon |
50 |
|
duck-potato |
Sagittaria lancifolia |
40 |
|
alligator-weed |
Alternanthera philoxeroides |
40 |
|
pickerelweed |
Pontederia cordata |
40 |
|
elephant-ear |
Colocasia esculenta |
40 |
|
water-pennywort |
Hydrocotyle umbellata |
20 |
|
buttonbush |
Cephalanthus occidentalis |
20 |
|
giant bulrush |
Scirpus californicus |
10 |
|
torpedograss |
Panicum repens |
10 |
|
knot grass |
Paspalum distichum |
10 |
|
elderberry |
Sambucus canadensis |
10 |