Kohei FURUKAWA, Masahiro KAIBORI, Tetsuya KUBOTA, Takashi JITOUSONO, Yutaka GONDA, Shigemitsu SUGIHARA, Shin]ichiro HAYASHI, Akihiko IKEDA, Yoshinori ARAKI and Yoshiaki KASHIWABARA
Abstract
The deluge on July 21 2009 in Yamaguchi, with the area's exceptionally heavy rainfall of 297mm, maximum intensity 72.5mm/hr and countless traces of debris flow, resulted in tremendous damage and high number of causalities in the area. Hence, urgent field investigation and reconnaissance were conducted by the society to overview this sediment related disaster. Here, the various results and the information obtained through this investigation were reported, mentioning the damages, the meteorological condition featuring precipitation, geologic]geomorphologic features and hydraulic characteristics of the debris flows, vegetation effects, and the efficiency of Sabo facilities against the sediment runoff in this disaster.
Key wordsFdebris disasters, heavy rainfall, efficiency of Sabo