SNOWMELT RUNOFF ANALYSIS CONSIDERING SNOW REDISTRIBUTION IN THE CHUBETSU DAM BASIN

Abstract

 Accurate prediction of dam inflow during snowmelt is important. Snowfall on mountain slopes is redistributed by wind, gravity, and topography. However, this effect is not taken into account in general snowmelt runoff analysis. In this study, based on the results of previous studies, snowmelt runoff analysis considering snow redistribution was conducted for the Chubetsu Dam basin. As a result, it was confirmed that the constructed runoff analysis model had good reproducibility, and that the reproducibility could be improved by performing snowmelt runoff analysis that takes snow redistribution into account. In particular, the reproducibility of peak values in the latter half of the snowmelt season was improved.