レーダー雨量情報に対応する分布型流出モデルの検討

抄録

Distrubuted rainfall-runoff model was developed using Radar AMeDAS Raingage Composite Map of Precipitation as input. It consists of two submodels: one for direct runoff and other for base flow. The direct runoff submodel is a distrubuted model which routes direct runoff in each grid through a channel network to outlet using the kinematic wave model. In this submodel, a watershed is considered as meshed grids connected by a channel network which is derived from altitude data at grid points. The base flow submodel is a lumped storage-drainage model. The model makes it possible to take the effects of areal distribution and movement of storm into account. Sample calculations with respect to Uono River basin resulted in a good corespondence between predicted and observed hydrographs.