Hourglass (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°31'20", Longitude 81°21'25"
Period of record: 49 sampling dates; May 4, 1995 to December 17, 1999
Surface area (Shafer et al. 1986): 14 acres / 6 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 49 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
51 |
73 |
107 |
|
Long-term total nitrogen concentrations (µg/L) |
650 |
1120 |
2400 |
|
Long-term total chlorophyll concentrations (µg/L) |
30.7 |
72.5 |
205.0 |
|
Long-term Secchi depth (ft) |
1.2 |
2.7 |
4.7 |
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-13-99 |
104 |
820 |
30.7 |
3.7 |
|
Feb-16-99 |
92 |
1140 |
71.0 |
4.7 |
|
Mar-18-99 |
71 |
890 |
31.0 |
3.7 |
|
Apr-19-99 |
107 |
1140 |
80.7 |
3.0 |
|
May-17-99 |
86 |
950 |
133.0 |
2.9 |
|
Jun-20-99 |
83 |
1020 |
60.0 |
3.2 |
|
Jul-18-99 |
64 |
850 |
50.5 |
3.2 |
|
Aug-16-99 |
74 |
880 |
51.0 |
3.3 |
|
Sep-16-99 |
77 |
910 |
66.7 |
3.1 |
|
Oct-14-99 |
51 |
650 |
42.3 |
3.4 |
|
Nov-19-99 |
66 |
1060 |
73.3 |
2.6 |
|
Dec-17-99 |
90 |
1540 |
128.3 |
2.2 |
|
|
|
|
|
|
|
1999 Average |
80 |
990 |
68.2 |
3.2 |