WATER-AIR TEMPERATURE RELATIONSHIPS IN A DEVON RIVER SYSTEM AND THE ROLE OF FLOW

The nature of the air-water temperature relationship and its moderation by discharge were investigated for catchments ranging in size from 2.1 to 610 km2 and for data relating to hourly, daily and weekly time bases. Significant departures from linearity from relationships were evident for hourly but not for daily mean or weekly mean data. A tendency for relationships between water and air temperatures to be stronger and more sensitive for flows below median levels was apparent and multiple regression analysis also revealed water temperature to be inverserly related to discharge.