91ÌÒÉ«

Abstract

This report, the precipitation data that had been obtained in Japan since 1890 are presented and the changing tendency of annual precipitation has been analyzed. The long-term tendency of precipitation indicates that the annual precipitation in recent years is likely to have decreased. However, it is extremely likely that the numbers of days with precipitation � 50 mm and � 100 mm have been increased, showing an increasing trend of extreme precipitation. The statistical data of sediment-related disaster due to precipitation also showed a slight increasing tendency with year, and this trend shows consistency with the occurrence of extreme precipitation, showing that the increased number of landslide likely resulted from extreme precipitation. Further, some catastrophic landslides (deep-seated landslides in Kii Peninsula triggered by Typhoon Talas in 2011, landslides in Oshima triggered by Typhoon Wipha in 2013, and landslides in Hiroshima triggered by heavy rainfall in 2014) were also introduced as examples, indicating that those extreme precipitation associated with typhoon and other climatic anomalies are continuing to trigger devastating landslides, bringing new challenge to the buildup of safe society.

Biography

Email: wanggh@landslide.dpri.kyoto-u.ac.jp