Sample | Season | Year | Day of year | Date | Hydrological conditions |
Calibration | Summer | 1998 | 221 - 227 | 9 August-15 August | Rapid decrease in air and water temperatures |
Calibration | Spring | 1999 | 132 - 138 | 12 May-18 May | Gradual increase in air and water temperatures |
Validation | Autumn | 2006 | 292 - 298 | 19 October-25 October | Autumn conditions |
Validation | Summer | 2007 | 203 - 209 | 22 July-29 July | Warm air temperature conditions |