A SIMPLE ESTIMATION METHOD FOR FLOOD CONTROL BUSINESS UNDER THE CLIMATE CHANGE

Abstract

 To rebuild robust infrastructures against severe natural disasters caused by climate change, our study extracted crucial data from the dam-construction guideline that was submitted to the expert panel on future flood control measures by Japan Ministry of Land, Infrastructure and Transport, and then estimated the costs for the seven flood control countermeasures that consist of dam construction, river channel dredging, set-back levees, levee heightening, detention basin, cut-off channel and circle levee. We proposed a simple estimation method that can obtain the feasible business costs related to flood controls. As a case study, future flood risks under the impacts of climate change and costs of flood damages were predicted for Naka River flowing through Fukuoka City. The most economical and effective combination for the implementation of adaptation measures to the target river was examined based on the estimated cost of flood damages.