Sediment disasters caused by Typhoon No. 10 on August 30, 2016 in Iwaizumi town and Miyako city, Iwate

Michiya IRASAWA, Daisuke HIGAKI, Naoto KOIWA, Mio TAKAHASHI, Takashi OKAMOTO, Masamitsu YASUNO, Nobuyuki TADA, Tatsuya NAKAJIMA, Mizuho ARAI, Tatsuya OCHIAI, Ryouichi KASAHARA, Akio SAITO, Satoshi SATO, Shinji HIROSE, Manabu KOUBU, Tatsuya SATO, Syunsuke OOTSUBO and Sakura MAKABE

Typhoon No. 10 which made landfall in the area around Ofunato in Iwate Prefecture on the 30th August 2016 caused extensive damage due to rivers flooding and sediment disasters in many municipalities, towns and villages on the eastern side of the Kitakami Mountains including Miyako and Kuji, isolation of communities due to roads being cut off and landslides. The number of landslides that occurred in Iwate Prefecture reached155 (as investigated by the Ministry of Land, Infrastructure, Transport and Tourism) and the Japan Society of Erosion Control Engineering organized a research team immediately after the disaster with the aim of investigating the processes of generation, flow and deposition of sediment and clarifying what actually occurred during the disaster. Our findings are published here.

Key wordsFdebris runoff, debris disaster, slope failure, surface runoff, woody debris