Comparison of Relationship Between Debris-Flow Volume and Peak Discharge in Different Regions

Abstract

Debris flows frequently occurred in Wenchuan earthquake region from 2008 to 2010, resulting in great damage to localities and being a prolonged threat to reconstruction. Twenty eight events' data including volume and peak discharge of debris--flow were analysed and compared with other debris-flow events in Switzerland, Japan, USA, China (Jiangjia gully), etc. The analysis reveals that there is a strong empirical relationship between debris-flow volume and debris-flow peak discharge in the earthquake region. However, the relationship between debris-flow volume and debris-flow peak discharge in Wenchuan earthquake is different with other regions. The volume of debris-flow with strong influence of earthquake is larger than that with no such influence under same peak discharge of debris-flow.