Runoff Analysis of the Abukuma River Basin Considering Infiltration

Abstract

As the first step to evaluate sediment transport in the Abukuma River basin, arainfall-runoff model has been developed to reproduce runoff phenomenons of the basin. This model considers not only overland flow but also infiltration, throughflow and exfiltration to aproach praticical phenomenons on the hillslope. A runoff computation of throughflow is practiced utilizing continuous equation and Darcy's law changing some parameters. The computed hydrographs with or without throughflow are compared with observed data, and the validity of this model and the effects of throughflow on the hydrograph are examined.