陕北黄土高原区滑坡发育类型与时空分布特征——以吴起县为例

Types and Spatio-Temporal Distribution of Loess Landslides in Loess Plateau Region——A Case Study in Wuqi County

自1970年代以来,因吴起油田的发现,吴起县石油开采及相关工程建设频繁,各项工程建设在为吴起县带来经济发展的同时也引发了大量滑坡灾害。以"陕西省延安市吴起县地质灾害详细调查"项目为依托,对县内滑坡的类型及分布情况进行了较为详细的野外调查。根据调查结果将滑坡分为黄土层内滑坡、黄土-红粘土接触面滑坡、红粘土-基岩接触面滑坡和黄土泥流滑坡四类,并对滑坡灾害的时间、空间及时空分布特征进行了分析,最后提出相关防治对策。

In the 1970s,great oil resources were detected in Wuqi.Since then,petroleum exploitation and related construction projects have been started one after another in Wuqi.The construction projects have brought Wuqi county the economic development,but also triggered a large number of landslide disasters.Relying on the project ＂Detailed Investigations of Geological Disasters in Wuqi County,Yan＇an,Shaanxi Province＂,intensive field investigations were carried out on the classification and distribution of landslides in Wuqi.According to the results of geological disaster investigation,the following types of loess landslides were classified,loess landslide,loess-clay interface landslide,clay-sandstone interface landslide and loess debris-flow landslide.Meanwhile,the spatio-temporal distribution of landslide disasters in loess plateau was analyzed and the related control measures were proposed.