Calculation of Water That Flows in River in North District, Japan

In this study, two models for snow and snowmelt were extended. Using those models, the calculation of water flowing in river was carried out. The results were compared with the observations. The outflow estimated by using the snow model in winter is in good agreement with the observations, and the snowmelt runoff predicted by using the snowmelt model in spring, April, May and June, is also at the good accuracy. The snowmelt runoff starts increasing from the early April, and it reaches the peak in the early May.