Bivans Arm (Alachua County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 29°37'38", Longitude 82°20'45"
Period of record: 58 sampling dates; August 6, 1992 to December 21, 1999
Surface area (Shafer et al. 1986): 189 acres / 76 hectacres
Lake Region (Griffith et al. 1997): Central Valley
Geologic formation (Brooks 1981):
The geology is dominated by clayey sand and clay with sandy to clayey limestone of the Hawthorne Formation.
Physiographic region (Brooks 1981):
The water body lies in the Alachua Prairies subdivision of the Northern Peninsual Plains division of the Ocala Uplift District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 4 months sampled:
|
pH |
9.6 |
Total alkalinity (mg/L as CaCO3) |
92.9 |
|
Conductance (µS/cm @ 25 °C) |
216 |
Magnesium (mg/L) |
3.1 |
|
Color (Pt-Co units) |
23 |
Sodium (mg/L) |
8.1 |
|
Chloride (mg/L) |
14.0 |
Potassium (mg/L) |
1.9 |
|
|
|
Calcium (mg/L) |
29.3 |
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 58 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
65 |
132 |
236 |
|
Long-term total nitrogen concentrations (µg/L) |
700 |
1620 |
3100 |
|
Long-term total chlorophyll concentrations (µg/L) |
11.7 |
83.6 |
287.3 |
|
Long-term Secchi depth (ft) |
0.8 |
1.6 |
3.5 |
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-20-99 |
112 |
1260 |
32.0 |
1.5 |
|
Apr-18-99 |
115 |
1320 |
42.0 |
1.7 |
|
May-23-99 |
76 |
1140 |
30.3 |
. |
|
Jul-11-99 |
76 |
890 |
51.3 |
2.8 |
|
Aug-26-99 |
112 |
1350 |
44.3 |
1.6 |
|
Sep-26-99 |
87 |
1240 |
64.7 |
2.5 |
|
Oct-23-99 |
92 |
1310 |
73.3 |
2.3 |
|
Nov-20-99 |
116 |
1360 |
47.7 |
2.3 |
|
Dec-21-99 |
148 |
1620 |
68.3 |
1.7 |
|
|
|
|
|
|
|
1999 Average |
104 |
1280 |
50.4 |
2.0 |