Arnold (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°31'51", Longitude 81°20'29"
Period of record: 45 sampling dates; December 16, 1990 to December 12, 1999
Surface area (Shafer et al. 1986): 27 acres / 11 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.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 2 months sampled:
|
pH |
8.1 |
Sulfate (mg/L) |
31.3 |
|
Total alkalinity (mg/L as CaCO3) |
16.3 |
Calcium (mg/L) |
14.7 |
|
Conductance (µS/cm @ 25 °C) |
191 |
Magnesium (mg/L) |
4.0 |
|
Color (Pt-Co units) |
8 |
Sodium (mg/L) |
9.5 |
|
Chloride (mg/L) |
20.7 |
Potassium (mg/L) |
4.7 |
|
Silicon (mg/L) |
0.3 |
|
|
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) |
10 |
31 |
57 |
|
Long-term total nitrogen concentrations (µg/L) |
350 |
720 |
1300 |
|
Long-term total chlorophyll concentrations (µg/L) |
1.0 |
33.7 |
85.3 |
|
Long-term Secchi depth (ft) |
1.5 |
4.0 |
9.3 |
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-18-99 |
57 |
900 |
53.7 |
2.2 |
|
Feb-22-99 |
40 |
750 |
29.7 |
3.0 |
|
Mar-31-99 |
34 |
950 |
37.0 |
2.5 |
|
May-03-99 |
23 |
450 |
14.7 |
5.5 |
|
Jun-03-99 |
11 |
440 |
1.0 |
8.5 |
|
Jul-04-99 |
14 |
480 |
14.3 |
7.7 |
|
Aug-01-99 |
10 |
420 |
12.0 |
4.5 |
|
Sep-03-99 |
13 |
490 |
17.7 |
4.3 |
|
Oct-04-99 |
16 |
510 |
16.7 |
5.2 |
|
Nov-03-99 |
15 |
540 |
7.3 |
9.3 |
|
Dec-12-99 |
18 |
450 |
22.7 |
7.5 |
|
|
|
|
|
|
|
1999 Average |
23 |
580 |
20.6 |
5.5 |
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