甘沟泥石流调查与危险性评价

Survey and Risk Evaluation on Gan'gou Gully Debris Flow

滇东北地区是我国地质灾害高发地区之一。2014年8月3日的6.5级强烈地震改变了鲁甸县的地质环境条件,并诱发了大量的崩塌、滑坡,储积了丰富的物源,在降雨充足的情况下容易发生泥石流,地质灾害点密度达45处/100km^2。甘沟流域位于云南省鲁甸县龙头山镇龙泉村,沟口正对着集镇。通过对流域的遥感解译和地质调查,掌握第一手基础地质资料,采用灰色关联分析法对甘沟泥石流的易发程度和危险性进行了分析和评价,以期能为龙头山镇的规划和灾后重建提供参考。

Northeastern Yunnan Province is one of the geological disaster frequently happened areas in China. The M6.5 earthquake happened on August 3,2014 has changed the geological and environmental conditions of Ludian County and induced a large number of collapse and landslide disasters. The collapse and landslide disasters have provided a rich material source of debris flow in the area. Adequate rainfall would cause debris flow and the density of geological hazard spots reached to 45 /100 km^2. Gan'gou watershed is located in Longquan Village Longtoushan Township of Ludian County in Yunnan Province and the opening of gulley is right facing the town. Through the remote sensing interpretation and geological survey of the watershed,it had fully grasped the first-hand basic geological data. The paper analyzed and evaluated the risk and susceptibility of debris flow of the gulley by grey relational analysis method for providing references for the planning and post-disaster reconstruction of Longtoushan Town.