强震区电网降雨型地质灾害暴发识别模型研究

Research on Identification Model of Rainfall Induced Geological Hazard Outbreak for Power Grid in Strong Earthquake Area

摘要:

以汶川地震强震区岷江干流及渔子溪沿岸的42个泥石流为研究对象，提取泥石流流域中物源存储量、暴发频率、流域面积等7个重要因子，运用CRITIC法建立电网降雨诱发泥石流灾害识别模型，将识别结果划分三级：15条泥石流流域属于高易发性泥石流灾害;11条泥石流流域属于中易发性泥石流灾害;16条泥石流流域属于低易发性泥石流灾害。然后，选取研究区内26条泥石流曾经一次冲出物源量来验证电网泥石流灾害识别模型的可行性。最后，通过ARCGIS平台生成电网泥石流灾害易发生分区图。

Abstract:

Taking 42 debris flows along the main stream of Minjiang Riverand Yuzixi catchment in strong earthquake area of Wenchuan as research objects, seven specific characteristics, such asstorage capacity of material sources, occurrencefrequency, catchment area etc., are selected for the evaluation of debris flow scale. Critic method is adopted to set up the identification model of rainfall induced debris flow for power grid. And the identification results are divided into three levels: high, medium and low prone areas of debris flow are 15 catchment basins, 11 catchment basins and 16 catchment basins respectively. Then the once outflow volume of 26 debris flows in the study area isselected to verify the feasibility of the proposed identification model of rainfall induced debris flow for power grid. Finally, the zone map where debris flows are prone to occurrence are generated through ArcGIS platform.