Analysis of small-scale disasters in sloping farmland due to heavy rains and earthquakes based on surveys and proposal of disaster risk index

2019 Fiscal Year Final Research Report

• Project/Area Number: 17K08000
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Rural environmental engineering/Planning
• Research Institution: Mie University
• Principal Investigator: OKAJIMA Kenji 三重大学, 生物資源学研究科, 准教授 (90466805)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: 傾斜農地 / 豪雨災害 / 地震災害 / 気象観測 / 農地石垣

Outline of Final Research Achievements

We focused on small-scale disasters on sloping farmland in the middle or mountainous regions where the number and scale of small-scale disasters have not been well studied. In this study, we analyzed the topography, geology of small-scale disasters on sloping farmland in the middle or mountainous area during the 2011 Kii peninsula flood disaster and the 2016 Kumamoto earthquake disaster. The results indicated that the area where the collapse of the agricultural stone wall during the Kumamoto earthquake was concentrated at the surface geological boundary. In the southern part of the Kii Peninsula, the typhoon path through the western part of the Kii Peninsula brings significantly more precipitation to the south-facing slope.

Free Research Field

農業農村工学

Academic Significance and Societal Importance of the Research Achievements

本研究は、中山間地の農地災害に関して、豪雨災害と地震災害を対象にその被災形態の分析や発災メカニズムの解明を目的として研究を行った。地震災害については，傾斜農地の被災集中箇所の特定を行うことで今後の地震災害における注意箇所を示すことができた．豪雨災害に関しては、気象ステーションを高密度に設置することで狭い地域内での風向などの気象条件や地形条件により降水量に差が出ることを示し，地域の防災情報の高度化に資する結果が得られた．