Abstract: This paper reviews the characteristics, initiation and development of the debris flows in a County in Sichuan Province. The hazard of these debris flows were quantitatively assessed by using the Single Gulley Method proposed by Liu Xilin and Tang Chuan in 1996. The results indicate that the hazard scale of these debris flows, H, is 0.47, and they are have medium level of risk. The debris flow avoidance and prevention recommendations are also provided.

Key words: Debris Flow, Debris Flow Development, Debris Flow Characteristics, Hazard Assessment