Observation of Snowfall, Snow-accumulation and Snowmelt

Abstract

Parameters used in models to forecast a snow depth from precipitation, to describe the deformation process of the snowpack and to calculate the snow-melt run-off are investigated in Waga river basin.
A rain or a snow is distinguished by using the air temperature as an index. The density of freshly fallen snow are measured in the field. Long term deformation of a snow pack is expressed by Burger's model and viscous coefficient of a snow is obtained from laboratory experiments as well as from the change in the depth of snow layers.
Degree-hour factor and the amount of snow-melt ground heat are also observed in the field.