Debris disasters induced by heavy rainfall in Northern Kyushu District in July 2012

Abstract

We had a deluge in July 2012 in the northern Kyushu district with intense rainfall of 800 mm and 108 mm/hr. This intensity yielded countless traces of debris flow and slope failures that induced tremendous damage and causalities in the area. Hence, several field investigations and reconnaissance tasks were conducted by the society to delve into this sediment-related disaster. The various results and the information obtained through this investigation were reported as the primary report, mentioning the damage, geologic-geomorphologic features and hydraulic characteristics of the debris flows, vegetation effects, and the efficiency of Sabo facilities in other scenes of this disaster.