ABSTRACT
The existence of a dam with a large enbankment capacity has an outstanding influence on the thermal equilibrium of a river. In fact, the water retained in the reservoir has an important thermal inertia; it keeps cold in summer and warm in winter, taking as a reference the temperature that the river water would have if there was no dam. Therefore, when the water starts to be drained from the dam, the process of recovery of its thermal equilibrium begins.
