DEVELOPMENT OF A FLOOD-INUNDATION MODEL NESTING A DISTRIBUTED RAINFALL-RUNOFF MODEL

Abstract

An impact assessment of a risk of water-related disaster under a changing climate has been highly concerned recently. For the assessment, it is important to examine a change of the magnitude of inundation disasters as well as that of flow regime under various climate conditions. To make an ensemble assessment of the magnitude of inundation disaster, systematic and computational cost-effective simulation is required. In this research, a flood-inundation model which nests a distributed rainfall-runoff model and is applicable to any part of a basin was developed. The developed model was successfully applied to the Shirakawa River catchment in Kyushu, Japan.