Willisaria (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°30'29", Longitude 81°21'40"
Period of record: 40 sampling dates; April 22, 1995 to September 11, 1999
Surface area (Shafer et al. 1986): 11 acres / 4 hectacres
Lake Region (Griffith et al. 1997): Orlando Ridge
Geologic formation (Brooks 1981):
The geology is dominated by phosphatic sand, silty sand, and clay of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Orlando Promontory division of the Central Lake District.
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 40 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
36 |
57 |
83 |
|
Long-term total nitrogen concentrations (µg/L) |
570 |
920 |
1340 |
|
Long-term total chlorophyll concentrations (µg/L) |
8.0 |
42.0 |
147.7 |
|
Long-term Secchi depth (ft) |
1.6 |
2.8 |
5.4 |
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-17-99 |
59 |
870 |
28.3 |
2.2 |
|
Feb-20-99 |
61 |
850 |
30.0 |
2.3 |
|
Mar-20-99 |
54 |
1040 |
39.3 |
2.8 |
|
Apr-17-99 |
55 |
980 |
49.0 |
2.3 |
|
May-15-99 |
54 |
1000 |
45.7 |
2.3 |
|
Jun-19-99 |
56 |
1090 |
35.7 |
2.3 |
|
Aug-14-99 |
59 |
1040 |
35.7 |
2.2 |
|
Sep-11-99 |
49 |
880 |
51.0 |
2.1 |
|
|
|
|
|
|
|
1999 Average |
56 |
970 |
39.3 |
2.3 |