A METHOD TO FORECAST DAM INFLOW IN SNOWMELT SEASON USING METEOROLOGICAL AND HYDROLOGICAL OBSERVATION DATA

Abstract

Dam inflow in snowmelt season shows diurnal variation and it reaches the peak of the day from evening to night. But it is difficult to forecast both quantity and time of the peak. In addition, the forecast of the beginnings of the peak season of the snowmelt is difficult. Therefore in the snowmelt season the system to monitor strictly the dam inflow is continued for a long term.

We conduct meteorological and hydrological observation in the Jozankei dam basin. Using the observation data, the relationship among the snowmelt heat at the surface of the snow pack, the runoff from the bottom of the snowpack and the dam inflow was investigated. As a result, we found that the relationship can be used for forecasting both quantity and time of the peak of dam inflow and beginnings of the peak season of the snowmelt.