Blue North (Polk County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 27°51'20", Longitude 81°34'52"
Period of record: 105 sampling dates; February 13, 1991 to December 6, 1999
Surface area : No data available.
Lake Region (Griffith et al. 1997): Northern Lake Wales Ridge
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 Iron Mountains 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Supplemental, unpublished water chemistry data, University of Florida.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 |
7.3 |
Total alkalinity (mg/L as CaCO3) |
30.0 |
|
Conductance (µS/cm @ 25 °C) |
255 |
Color (Pt-Co units) |
2 |
|
Chloride (mg/L) |
21.5 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 105 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
1 |
4 |
9 |
|
Long-term total nitrogen concentrations (µg/L) |
1870 |
3860 |
6010 |
|
Long-term total chlorophyll concentrations (µg/L) |
0.3 |
1.8 |
5.0 |
|
Long-term Secchi depth (ft) |
9.7 |
23.2 |
38.5 |
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-08-99 |
2 |
2540 |
4.7 |
14.0 |
|
Mar-02-99 |
5 |
2680 |
1.0 |
22.2 |
|
Apr-08-99 |
5 |
2820 |
1.0 |
21.7 |
|
May-05-99 |
4 |
2680 |
2.0 |
17.7 |
|
Jun-10-99 |
5 |
2680 |
2.0 |
13.7 |
|
Jul-01-99 |
7 |
2790 |
3.0 |
11.0 |
|
Aug-04-99 |
4 |
2320 |
2.3 |
17.7 |
|
Sep-11-99 |
8 |
2350 |
4.3 |
15.2 |
|
Oct-11-99 |
7 |
2150 |
3.7 |
16.3 |
|
Nov-15-99 |
6 |
1900 |
2.0 |
14.0 |
|
Dec-06-99 |
5 |
1870 |
2.0 |
18.8 |
|
|
|
|
|
|
|
1999 Average |
5 |
244 |
2. |
16.6 |
Blue North (Polk County)
Florida LAKEWATCH Aquatic Plant Summary
Aquatic plant data collected on November 10, 1993
|
Percent area covered with aquatic vegetation (PAC, %) |
. |
|
Percent of lake's volume filled with vegetation (PVI, %) |
. |
|
Average emergent plant biomass (kg wet wt/m2) |
6.0 |
|
Average floating-leaved plant biomass (kg wet wt/m2) |
0.2 |
|
Average submersed plant biomass (kg wet wt/m2) |
0.2 |
|
Average width of emergent and floating-leaved zone (ft.) |
26 |
|
Average lake depth (m) |
. |
Frequency that plant species occur in 10 evenly spaced transects around the lake.
|
Common Name |
Plant Species |
Frequency (%) |
|
water primrose |
Ludwigia octovalvis |
80 |
|
torpedograss |
Panicum repens |
80 |
|
water-pennywort |
Hydrocotyle umbellata |
60 |
|
rush fuirena |
Fuirena scirpoidea |
50 |
|
maidencane |
Panicum hemitomon |
40 |
|
southern cutgrass |
Leersia hexandra |
30 |
|
slender spikerush |
Eleocharis baldwinii |
20 |
|
red ludwigia |
Ludwigia repens |
10 |
|
smartweed |
Polygonum hydropiperoides |
10 |
|
cat-tail |
Typha spp. |
10 |
|
dwarf arrowhead |
Sagittaria subulata |
10 |
|
para grass |
Brachiaria mutica |
10 |
|
musk-grass |
Chara spp. |
10 |
|
bald cypress |
Taxodium distichum |
10 |
|
elderberry |
Sambucus canadensis |
10 |