MODELING OF SNOWFALL AND SNOWMELT PROCESS AND APPLICATION TO PREDICTION OF RIVER SNOW MELT OUTFLOW

Abstract

A simple model for estimation of snowfall and snow melt was proposed. In this model, the amount of precipitation and air temperature were needed as input data. Seven parameters used in this model were identified by field observations, in-situ experiments and laboratory experiments. Furthermore, to evaluate river runoff induced by snow melt, a numerical model was established. In the estimation of distribution of precipitation in the basin, Rader data was used considering the effects of snow flake drift during falling onto the ground. As a runoff model, a tank model was employed. The validity of the proposed model for estimation of river runoff induced by snow melt was examined by comparing with measured inflow into a dam.