中文摘要：

通过在室内构建泥石流源区松散堆积土体斜坡模型,采用三种不同降雨强度对其稳定性进行研究。得出了不同降雨强度下斜坡土体流失规律与斜坡的失稳方式。结果表明：在低雨强（26mm/h）作用下,松散斜坡的土体流失量最少,并以坡面侵蚀为主;在中、高雨强（51mm/h,68mm/h）作用下,首先表现为坡面侵蚀和沟道侵蚀,进而是大规模土体流滑破坏,在土体累积流失量与时间曲线上有突变点;在高雨强作用下,形成了阵性泥石流。

英文摘要：

There are indoor artificial rainfall experiments in self-designed model under different rainfall intensity（26 mm/h,51 mm/h,68 mm/h）to study the mechanism of loose deposit slope stability in the debris region.The results showed that the soil loss under low rainfall intensities of 26mm/h is least,and the failure mode of slope is slope surface erosion;but under high rainfall intensities of 51 and 68mm/h,both failure modes of slope are slope surface erosion and gully erosion,and flowslide is the main failure mode,which are correspond to the mutation point of curve of cumulative soil loss vs time.Intermittent debris flow is formed under high rainfall intensities of 68 mm/h.