A method to construct flood damage map with an application to Huong River basin, in Central Vietnam

Abstract

In recent years, under impacts of human activities and climate change, flood has been increased in both the frequency and magnitude, causing lots of damages to people. This study presents a method to evaluate the direct spatial damages of flooding based on inundation depth and land use data. Damage functions for different types of land use arc selected and applied. Matlab strings and GIS are combined to calculate damage in monitery term. The method is applied for estimating loss caused by thc flood event November 1999 for Huong rivce basin. The relative agreement between total damage of survey data and estimated results shown that the methodology provided in this study is applicable. The methodology can be used to determine the flood-induced economic loss for cost-benefit analysis in the flood control projects.