皮山县某泥石流沟分区及风险评价  

Zoning and Risk Assessment of A Debris Flow Gully in Pishan County,Xinjiang

作　　者：李志伟 徐刚[1] 罗涛[1] 冯邦国 熊英禾 刘勇[1] 倪凡 LI Zhi-wei;XU Gang;LUO Tao;FENG Bang-guo;XIONG Ying-he;LIU Yong;NI Fan(Regional Geological Surveying Team,BGEEMRSP,Chengdu 610213)

机构地区：[1]四川省地质矿产勘查开发局区域地质调查队,成都610213

出　　处：《四川地质学报》2021年第S01期109-112,共4页Acta Geologica Sichuan

摘　　要：为了更好服务皮山县防灾减灾,有必要对典型泥石流沟进行详细调查评价。通过野外调查,结合天地图实体勾绘,了解该泥石流沟地质环境、分区特征;对该泥石流沟15项影响因素、直接损害、潜在威胁对象调查统计以及相关数据收集和公式计算,定性-半定量评价该泥石流沟易发程度、危害性和危险性,了解该泥石流动力参数特征和演变特征。根据研究发现,该沟为标准泥石流沟,分区明显,形成区(流通区)-堆积区;该泥石流处于活跃期且易发,其规模等级为中型,危害等级为中型;潜在危险性等级为极高,活动性等级为高级。按50年一遇的频率计算,该泥石流沟最大流速为1.54 m/s;峰值流量为1917.43m^(3)/s;一次泥石流总量为5.79×10^(4)m^(3),固体物质总量为3.76×10^(4)m^(3)。This paper has a discussion on geological conditions,and 15 influence factors and dynamic parameters and evolution of a debris flow gully in Pishan,Xinjiang and evaluates its susceptibility,harmfulness and danger.According to the frequency of once in 50 years,the maximum velocity of the debris flow y is 1.54 m/s,the peak flow is 1917.43 m^(3)/s,the total amount of a debris flow is 5.79×10^(4)m^(3)and the total amount of solids was 3.76×10^(4)m^(3).

关 键 词：皮山县 泥石流 分区特征 动力参数 调查评价 

分 类 号：P642.23[天文地球—工程地质学]