Temporal- and spatial- variations in fatalities by landslides

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04590
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 25030:Disaster prevention engineering-related
• Research Institution: University of Miyazaki
• Principal Investigator: Shinohara Yoshinori 宮崎大学, 農学部, 准教授 (10615446)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 土砂災害 / 死者数 / 降雨 / 森林 / 日本

Outline of Final Research Achievements

The objective of this study was to clarify the factors affecting the temporal and spatial variations in landslide fatalities. Focusing on the fact that most people died inside houses, the number of landslide fatalities was considered as the product of the numbers of landslides, collapsed houses per landslide, and fatalities per collapsed house. Trends in these features were compared with trends in the factors affecting these features. It was found that the factors contributing to the decrease in landslide fatalities changed with time. Furthermore, this study also indicated the importance of land use, especially forests, in the occurrence of landslides.

Free Research Field

国土管理保全学

Academic Significance and Societal Importance of the Research Achievements

土砂災害による死者数減少は先進国に共通してみられる現象であるが，その要因を明示したのは本研究が世界初である。充実した日本の統計データ等に着目し，網羅的に収集し解析することで，成果を生み出すことができた。本研究は，国内の防災対策において参照されるだけでなく，これから死者数減少を目指す国々にとっても重要な知見を提供していることから社会的意義も大きい。