A PRODUCING METHOD OF DETAILED FLOOD DEPTH DISTRIBUTION ON THE GROUND ALTITUDE MODEL FROM ROUGH FLOOD ANALYSIS AND SPLINE INTERPOLATION

Abstract

 The method for estimating detailed flood depth distribution from a rough mesh analysis in a short time was proposed. Pound method and the spline interpolation are applied to the calculated flood depth obtained by 25m mesh model. And, the estimated value near the analytical result of 5m mesh is obtained on the ground altitude model. The following findings were obtained. (1)Analytical time of the proposal method was 1/173 against 5m mesh analysis time. (2)The difference of average flood depth between the proposal method and 5m mesh analysis was 9.1% in an analytical object region. It is thought that produced method is profitable for a real-time flood forecast.