摘要
黄河上游西宁、循化、贵德、共和等盆地内第四系更新统砂砾石地层分布区泥石流灾害较发育,危害较严重,且直接参与泥石流的松散动物源和潜在静物源均由砂砾石组成,为一类特殊的砂砾石类泥石流.本文以青海省兴海县境内黄河左岸的3条砂砾石类泥石流沟为例,详细研究了该类泥石流的形成条件及基本特征,揭示了砂砾石泥石流物源转化特征及其动力学特征.在此基础上,选取流域面积、主沟长度等评价指标,采用熵值法对该类泥石流危险性进行评价.成果为该类泥石流灾害的防治、工程设计提供了依据.
In the upper reaches of the Yellow River in Xining, Xunhua, Guide and Gonghe Basins, debris flow hazards are relatively developed and serious, and the loose animal sources and potential still life sources directly involved in the debris flow are composed of sand and gravel, which are a special class of sand and gravel debris flows.Taking the three sand-gravel debris flow gullies on the left bank of the Yellow River in Xinghai County, Qinghai Province as an example, the formation conditions and basic characteristics of the debris flow are studied in detail, and the transformation characteristics and dynamic characteristics of the debris flow sources are revealed.On this basis, eight evaluation indexes, such as basin area and length of main gully, were selected, and the entropy method was used to evaluate the risk of three sand-gravel debris flows, providing a basis for the prevention and control of debris flow disasters and engineering design.
作者
常文娟
何文野
王楷
张宜杰
CHANG Wen-juan;HE Wen-ye;WANG Kai;ZHANG Yi-jie(China Power Construction Group Northwest Survey Design and Research Inst让ute Co.,Ltd.Xi'an,Shanxi 710065,China;State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Tech no logy,Chengdu 610059,China)
出处
《地质灾害与环境保护》
2020年第3期3-9,共7页
Journal of Geological Hazards and Environment Preservation
关键词
砂砾石类泥石流
发育特征
危险性评价
Sand-gravel debris flow
development characteristics
hazard assessment
