Tab. 1. Physical and chemical characteristics measured for Charcote and Charcotico during four survey periods. DO was not measured during November and December. January was the low-water period, September was near the peak of the annual flood pulse, and during November and December floodwaters were gradually receding.
| Parameter |
September |
November |
December |
January |
| Charcotico |
Charcote |
Charcotico |
Charcote |
Charcotico |
Charcote |
Charcotico |
Charcote |
| Water temperature (°C) |
28 |
27 |
27 |
28 |
26 |
27.5 |
29 |
30 |
| Air temperature (°C) |
30 |
26 |
28 |
27 |
30.5 |
30 |
26 |
34 |
| pH |
5.5 |
5.5 |
6 |
5 |
5.5 |
5.5 |
5.5 |
5.75 |
| Water velocity (m/s) |
0.12 |
0.45 |
0.39 |
0.39 |
0.3 |
0.39 |
0 |
0 |
| DO (mg/L) |
6 |
6 |
– |
– |
– |
– |
5 |
4 |
| Max. water depth (m) |
1.22 |
2.27 |
1.16 |
2.15 |
1.1 |
1.65 |
0.5 |
1.25 |
| % Aquatic vegetation |
0 |
0 |
0 |
50 |
0 |
75 |
0 |
20 |
| % Canopy cover |
4 |
5 |
5 |
5 |
2 |
3 |
2 |
0 |
| Secchi depth (m) |
1.22 |
2.27 |
1.16 |
2 |
0.5 |
0.4 |
0.2 |
0.35 |