Incorporating Wind Damage in Potential Flood Loss Estimation

摘要

Despite concentrated global efforts, flood losses worldwide are increasing. This trend is expected to escalate further due to climate change. The fourth IPCC report has explicitly warned against increase of flood disasters and recent studies show increased rainfall intensities and intensification of typhoons will contribute to further increases in flood losses. Estimation of potential flood losses can play an important role in investing for prevention as well as for developing financial instruments to reduce flood risks. However only a few flood loss estimation models consider damages caused by wind effects during flooding. The main objective of this paper is to review and discuss the possibility of incorporating wind induced damage in urban flood loss estimation. First, an overview of the flooding loss and damage models is presented. Then, the applicability of flood loss estimation with inundation using loss function and inundation modeling is introduced as an example in the Ichinomiya River basin, Japan. Finally, an approach to estimate wind damage loss on urban buildings during flooding events is introduced. The flood damage case study is then analyzed to assess wind related damage.