Table 4.
Seven-day average daily maximum (7DADM) water temperature at main stem and confluence sites where instream loggers were deployed at the bottom of the river. Cold-water refuge persistence (percentage of time) is presented for ambient and physiological criteria based on whether the 7DADM confluence temperatures were (1) 1 or 2°C cooler than the 7DADM main stem temperature, or (2) below 18°C. Stratification is defined as the percentage of time when hourly differences between surface and bottom water temperatures are equal or greater than 2°C.
| Site | Bottom water temperature 7DADM (°C) | Cold-water refuge persistence (%) | Stratification (%) | |||
|---|---|---|---|---|---|---|
| Confluence | Main stem | Criterion = <18°C | Criterion = 2°C | Criterion = 1°C | ||
| C1 | 18.8 | 24.0 | 53 | 100 | 100 | 97 |
| C2 | 24.0 | 24.0 | 0 | 0 | 0 | 1 |
| C3 | 14.7 | 24.0 | 100 | 100 | 100 | 100 |
| C4 | 12.4 | 24.0 | 100 | 100 | 100 | 100 |
| C5 | 20.1 | 24.0 | 17 | 100 | 100 | 95 |
| C6 | 18.1 | 24.0 | 97 | 100. | 100 | 36 |
| C7 | 23.0 | 24.0 | 10 | 86 | 93 | 43 |
| C8 | 22.8 | 24.0 | 0 | 35 | 55 | 25 |
| C9 | 20.8 | 21.7 | 0 | 37 | 96 | 70 |
| C10 | 18.5 | 23.8 | 62 | 100 | 100 | 39 |
| C11 | 18.8 | 23.8 | 45 | 100 | 100 | 32 |
| C12 | 21.7 | 24.0 | 0 | 100 | 100 | 33 |
| C13 | 18.7 | 24.0 | 55 | 100 | 100 | 0 |
| C14 | 24.5 | 24.0 | 31 | 52 | 66 | 77 |
| C15 | 23.7 | 24.3 | 0 | 31 | 52 | 36 |
| C16 | 18.1 | 24.3 | 97 | 100 | 100 | 14 |
| C17 | 15.6 | 24.3 | 100 | 100 | 100 | 87 |