2004年7月8日,四川甘孜州色达县歌乐沱乡切都柯沟暴发泥石流。由于前期断断续续一个多月的降雨,使得切都柯沟多处发生崩塌,大量松散固体物质含水量趋于饱和,致使在7月8日一场不大降雨的情况下触发了泥石流。这次泥石流灾害造成的损失虽不十分严重,但泥石流过程比较典型。我们将考察结果整理成文,并用已有的泥石流风险评价模型对其危险度、易损度和风险度作了分类评价,以期为今后的深入研究和防灾减灾实践提供基础。 July 8, 2004, Sichuan Ganzi County Seda County Songtao Township Cheodu Kegou outbreak of debris flow. Due to the pre-off more than a month of rainfall, making the cut Ke Ke ditch collapse occurred in many places, a large number of loose solid material tends to saturation of water content, resulting in July 8 a little rainfall triggered debris flow. Although the losses caused by the debris flow disaster are not very serious, the debris flow process is typical. We organized the study results and classified the risk, vulnerability and risk using the existing debris flow risk assessment models in order to provide the basis for further research and disaster prevention and mitigation in the future.