COMPUTATION OF EVAPORATION FROM TALUS AND ROCKS.

One of the characteristic features of talus and rock surfaces is their very low water-holding capacity for which reason losses by evaporation are relatively small. Groundwater recharge is more intense in the presence of such surfaces than it is in areas occupied by high-mountain alpine vegetation. In the hydrologic investigations and in the development of methods for computing (forecasting) the runoff hydrograph it is necessary to compute evaporation from talus and rock surfaces. The paper proposes a computation procedure and reports on its verification.