Movement of debris flow by eyewitness reports from the June 29 Hiroshima Debris Flow Disasters in 1999

Abstract

The processes of debris flow has not been made clear. The repots of eyewitnesses help us understanding the processes of debris flow. The debris flow in Yokobayashi River, one of the debris flow torrents of ‘June 29, 1999 Hiroshima Disaster’, occurred at 4pm and it was seen by two people. The debris flow came two times from two tributaries. The situation reported by them was visualized with computer graphics.