Le calcul de la temprature de l'eau des rivires

Abstract Water temperature was calculated at hourly intervals for periods of several consecutive months in Chaudiere and Du Nord rivers, Quebec, Canada. Calculations were made by the thermal budget method using routine meteorological and hydrological observations from nearby stations. Hourly observations of water temperature for 112 consecutive days on Du Nord river were compared with hourly calculated values: the maximum difference is 3.3°C, the overall r.m.s. figure is 1.2°C and the maximum mean monthly difference is 0.9°C. Comparable results are obtained for Chaudiere river. A discussion follows on method, results and differences between the two rivers.