Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Date (from‐to) : 2018/04 -2021/03
Author : Yoshiomi Otsuka
In this study, we developed a policy formulation method to optimize the advanced sewerage treatment system for the entire watershed and deal with the imbalance of costs and benefits among municipalities in the watershed caused by the advanced sewerage treatment and a method to achieve consensus building on the policy. We applied it to the Nakagawa watershed and converted benefits delivered from advanced treatment into monetary values, and presented cost allocation scenarios for Saitama Prefecture and Tokyo Metropolitan Government in the case to maximize the benefits per watershed unit. We conducted consensus building for scenario selection using the online Planungszelle method. The result shows that consensus-building can be achieved through discussion between residents of Saitama Prefecture and Tokyo Metropolis, which have conflicting interests, and that it is possible to extract scenarios that both parties support.