Lulu (Polk County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 27°59'43", Longitude 81°43'13"
Period of record: 101 sampling dates; September 2, 1991 to December 4, 1999
Surface area (Shafer et al. 1986): 301 acres / 122 hectacres
Lake Region (Griffith et al. 1997): Winter Haven/Lake Henry Ridges
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Supplemental, unpublished water chemistry data, University of Florida.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 1 month sampled:
|
pH |
8.8 |
Sulfate (mg/L) |
25.3 |
|
Total alkalinity (mg/L as CaCO3) |
61.0 |
Conductance (µS/cm @ 25 °C) |
260 |
|
Color (Pt-Co units) |
22 |
Chloride (mg/L) |
25.0 |
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 101 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
35 |
52 |
75 |
|
Long-term total nitrogen concentrations (µg/L) |
970 |
1270 |
1750 |
|
Long-term total chlorophyll concentrations (µg/L) |
6.0 |
42.0 |
72.0 |
|
Long-term Secchi depth (ft) |
1.5 |
2.2 |
4.0 |
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-01-99 |
47 |
1050 |
45.7 |
1.8 |
|
Jan-31-99 |
46 |
1010 |
38.0 |
2.5 |
|
Mar-07-99 |
40 |
990 |
28.3 |
2.3 |
|
Apr-07-99 |
56 |
1190 |
39.7 |
2.0 |
|
May-02-99 |
52 |
1320 |
44.7 |
1.8 |
|
Jun-06-99 |
50 |
1060 |
32.3 |
1.8 |
|
Jun-27-99 |
53 |
1230 |
44.3 |
2.0 |
|
Aug-01-99 |
48 |
1110 |
50.3 |
1.8 |
|
Aug-29-99 |
54 |
1430 |
60.3 |
1.5 |
|
Oct-03-99 |
53 |
1540 |
57.0 |
1.8 |
|
Nov-07-99 |
52 |
1500 |
51.3 |
1.8 |
|
Dec-04-99 |
54 |
1410 |
42.0 |
2.0 |
|
|
|
|
|
|
|
1999 Average |
50 |
1240 |
44.5 |
1.9 |
Lulu (Polk County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on May 18, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
54 |
|
Percent of lake's volume filled with vegetation (PVI, %) |
3 |
|
Average emergent plant biomass (kg wet wt/m2) |
4.0 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
2.3 |
|
Average submersed plant biomass (kg wet wt/m2) |
3.0 |
|
Average width of emergent and floating-leaved zone (ft.) |
79 |
|
Average lake depth (m) |
2 |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
cat-tail |
Typha spp. |
90 |
|
tapegrass |
Vallisneria americana |
80 |
|
elephant-ear |
Colocasia esculenta |
50 |
|
water primrose |
Ludwigia octovalvis |
40 |
|
elderberry |
Sambucus canadensis |
40 |
|
spatterdock |
Nuphar luteum |
30 |
|
knot grass |
Paspalum distichum |
30 |
|
giant bulrush |
Scirpus californicus |
20 |
|
torpedograss |
Panicum repens |
20 |
|
bald cypress |
Taxodium distichum |
20 |
|
floating water-hyacinth |
Eichhornia crassipes |
10 |
|
alligator-weed |
Alternanthera philoxeroides |
10 |
|
smartweed |
Polygonum hydropiperoides |
10 |
|
water-pennywort |
Hydrocotyle umbellata |
10 |
|
buttonbush |
Cephalanthus occidentalis |
10 |