叶城波龙7.20泥石流应急调查及灾害链实时观察  

The Emergency Investigation of Debris Flow at Polong Valley, Yecheng County on July 20th,2017 and Real Time in-situ Observation

作　　者：尚彦军[1,2,3] 帕尔哈提·祖努 魏思宇 杨长德[1] 张峰玮 Shang Yanjun;Parhat Zunu;Wei Siyu;Yang Changde;Zhang Fengwei(Xinjiang Institute of Engineering,Urumqi,Xinjiang,830023,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China;University of Chinese Academy of Sciences,Beijing,100049,China)

机构地区：[1]新疆工程学院,新疆乌鲁木齐830023 [2]中国科学院地质与地球物理研究所,北京100029 [3]中国科学院大学,北京100049

出　　处：《新疆地质》2019年第2期253-259,共7页Xinjiang Geology

基　　金：自治区十三·五重点专业建设“地质工程”项目;科技厅国际合作项目(20166017);国家自然基金面上项目(41772320);地质灾害防治与地质环境保护国家重点实验室项目(SKLGP2017K021)共同资助

摘　　要：针对叶城柯克亚乡波龙7.20突发泥石流灾害,现场开展了应急科学调查。对沟下游泥石流堆积区进行量测,对上游突发小型滑坡-堰塞湖-泄流全过程开展实时观察。结果发现:泥石流固体物质主要是晚更新世风积土滑坡和中元古变质岩及碳酸盐岩崩塌,水体来源主要是强降雨导致的上游洪水及堰塞湖溃决;沟谷上游以稀性泥石流为主,下游加入了崩塌块体及河道砂砾石,粘度有所增大;堆积区呈块石散落和淤积状态。据现场多个老堰塞坝推测,波龙沟泥石流发生周期约15~20年。现有停车场位于沟口堆积区,需加大极端洪水及泥石流排泄空间,拓宽排导沟槽净空。In response to the sudden debris flow disaster on July 20th in the Polong Valley of Yecheng County, an emergency scientific investigation was carried out on this site. The debris flow accumulation area downstream of the ditch was measured, and the whole process of the small landslide, blocked lake and discharge flow in the upstream were observed in real time. It is found that the solid materials of the debris flow are mainly the Late Pleistocene Aeolian landslide and the Mesoproterozoic metamorphic rocks and carbonate rock collapse. The water resource is mainly from the upstream flood and the outburst of the dammed lake caused by the heavy rainfall. The upper part of the valley is dominated by dilute debris flow, while the viscosity of the downstream debris flow is increased due to the addition of the collapsed rocks and the stream bed gravels. In the accumulation area, the block stones are scattered and deposited. According to several old landslide dams in the valley, the occurrence cycle of the debris flow in the Polong Valley is estimated to be 15~20ys. The parking site is located in the accumulation area, so it is necessary to increase the discharge space and widen the drainage culvert.

关 键 词：波龙沟 泥石流 灾害链 实时观察 

分 类 号：P694[天文地球—地质学]