Watershed Land Use Planning with Heavy Rain Disaster:Strategic Planning of "Prevent", "Avoid", and "Be with"

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K21034
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 23:Architecture, building engineering, and related fields
• Research Institution: Hiroshima University
• Principal Investigator: Tanaka Takahiro 広島大学, 先進理工系科学研究科(工), 教授 (30379490)
• Project Period (FY): 2020-07-30 – 2022-03-31
• Keywords: 豪雨災害 / 土地利用 / 流域 / 気候変動適応 / GIS

Outline of Final Research Achievements

In recent years, Japan has been hit by heavy rainfall disasters every year, and flooding has caused much damage (human casualties and building damage). In this study, a scenario of "adaptive watershed land use planning for heavy rainfall disasters" was developed with a view to future land use changes, and the effectiveness of "adaptive watershed land use planning for heavy rainfall disasters" was demonstrated in terms of disaster risk reduction and cost through comparison with a scenario in which conventional river flood countermeasures are continued. Specifically, the study strategically allocated "areas that should be protected from flooding," "areas that should be protected from flooding," and "areas that should be protected from flooding.

Free Research Field

都市計画

Academic Significance and Societal Importance of the Research Achievements

現在の河川氾濫による水害の対策は、土木的ハード整備とソフト対策が中心で、流域土地利用計画検討の必要性が指摘されることはあるものの、実際に「豪雨災害適応型流域土地利用計画」を描くような研究は見られない。実現に困難を伴うため、これまで避けられてきた「将来の土地利用再編の提案」が、本研究成果の意図であり、建築・都市計画分野の挑戦的研究として社会的意義があると考えられる。