RIVER BASIN SCALE ANALYSIS ON FLOOD CHARACTERISTICS BASED ON FLOOD RUNOFF MODEL WITH d4PDF NHRCM

Abstract

 A flood frequency analysis was conducted for the entire river basin of eight rivers in central Japan. The precipitation of d4PDF NHRCM was input to the flood runoff analysis by the storage function method. As a result of analyzing the calculation result, the distribution of small basins, which are closely related to the extreme floods of the main river, differed from basin to basin. The rate of change in flood flow due to climate change was greater for less frequent extreme floods. This method can analyze the flood characteristics of each basin and at the same time analyze the effects of climate change impact.