Assessment of the relationships between rainfall frequency caused by typhoons and tropical storms, sediment yields, and the effect of global warming

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K16287
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Geography
• Research Institution: Kanto Gakuin University
• Principal Investigator: Saito Hitoshi 関東学院大学, 経済学部, 准教授 (00709628)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 斜面崩壊 / 降雨 / 土砂生産量 / 日本列島 / 台湾

Outline of Final Research Achievements

This study analyzed the relationships between heavy rainfall frequency caused by typhoons and frontal storms, landslide occurrences, and the sediment yields in Japan and Taiwan. We produced a probable hourly precipitation dataset. Our results showed the characteristics of rainfall types for recent landslide related rainfall events. This study also showed potential sediment yields as an order of 100,000 m3/km2 due to a single rainfall event at the Aso Volcano region. Most landslide related rainfall events in Taiwan were caused by typhoon. The high proportion of large landslides in Taiwan contributes significantly to the high annual sediment yield.

Free Research Field

地理学