Characteristics of Flood and Land Slide Disasters in Eastern part of Yamaguchi Prefecture by Heavy Rainfall in July 2018

Abstract

From July 5-8, 2018, a heavy rainfall was generated by the Baiu-front in the Eastern region of the Yamaguchi Prefecture. 48 hours precipitation (July 7, 5:10) in Kuga AMeDAS observatory were recorded 455.0 mm. In the Osogoe area of Iwakuni City and the Higuchi area of Shunan City, landslide disaster occurred due to the heavy rainfall, killing three people and damaging many homes due to the flooding of the Shimata River in the Mitsuo area of Shunan City and the Mii area of Hikari City. The process of converting flooded paddy fields into residential lands is ongoing in the Mii area, and it is important that inhabitants fully understand the risk of inundation damages.