The Effects of Flood Control Measures on Inhabitants' Risk Perception

-The Case of the Mamagawa River on the Tonegawa basin-

Abstract

In the Japanese postwar era, flood control measures focused mainly on river improvements and dams. Meanwhile, urbanization gave birth to new flood risks, so comprehensive flood control measures that have storage facilities, osmosis plants, and soft measures began. This thesis aims to test the hypothesis that these new flood control measures have not only physical effects but also psychological effects to risk perception. By conducting a questionnaire survey, it became clear that recognition of flood control measures is important in the formation of flood risk perception.