Particle Routing Segregation of Debris Flow Mechanisms Near the Erodible Bed

Abstract Debris flows represent a natural hazard in mountainous terrain around the world. Numerous catastrophic events have occurred in recent years. In contrast to other types of landslide activity, debris flows may be considered to be a ‘low- magnitude high frequency’ hazard. They result in damage to property and, in some circumstances, may also result in loss of life. This paper presents and discusses about the debris particles routing segregation characteristics near the erodible bed at 25° slope angle. The particle movement was visually analyzed by using high speed video camera (HSVC) to capture the movement characteristics of the individual particle grain. The footage of particle routing characteristics can be used as a proof for further investigation study. Large boulders running at the front carry enormous amount of energy so that debris is quite hazardous in terms of destructive power and the size of disaster area. The resulting destruction of debris flow characterized first by massive impact force of the front and second, the burying capacity of valuable land, assets and infrastructures.