Research on Motion Characteristics and Formation Mechanism of Debris Flow

Abstract

On July 9 2013, debris flows occurred around Longchi town with large scale and wide harm, which was a great threat to people's life and property as well as reconstruction work. Debris flow ditch in the surrounding town was studied. This paper focused on loose materials, topography and rainfall characteristics, and explored the formation mechanism of debris flow in Longchi town. The result shows that: a small catchment area in valleys also have the risk of large range of accumulation of debris flow, the debris flow is caused by a lot of loose materials in mountains after earthquake and extreme rainfall. Research results contribute to a better understanding of trigger condition of debris flow after earthquake.

Effect of initial water content on soil failure mechanism of loess mudflow disasters

“…Loess mudflow is a common geological disaster in the Loess Plateau. The content of sand in the composition of solid material is between 10 and 20%, and more than 98% of the particles are smaller than 2 mm (Wu, 2014). Compared with debris flow, loess mudflow is characterized by some particularities.…”