Jun TANOWAKI

The Study of Developing Snow Compressing and Melting Model Over Wide Area in Hokuriku

Norio HAYAKAWA

Horizontal distributions of a water-equivalent snow accumulation and a snow coverage on a ground surface are important to study water resource managements.
Meteorological numerical simulation model can calculate snowfall intensities in mountain regions where the snow accumulation is hardly observed.
Snow compressing and melting model, which is needed to treat heat and water balance near a ground surface, is developed to build in the meteorological simulation model.
We validate it using temperature, precipitation and wind speed observed at operationally observed stations.
It is found that the model is available almost all stations except a few stations.
It is thought that our model works well as the part of the meteorological simulation model because the miss-estimations in above a few stations are caused by insufficient catch of the precipitation into a gauge, local effect of drift of snow or miss-conversion from the precipitation to the snow intensity by using the temperature.