四川泸定县城羊圈沟泥石流动力学特征与监测预警初探  

Dynamic Characteristics and Preliminary Monitoring of the Debris Flow of Yangjuan Gully of Luding in Sichuan

作　　者：宋志[1,2] 符浩[3] 巴仁基[1] 刘宇杰[1] 

机构地区：[1]中国地质调查局成都地质调查中心,四川成都610081 [2]西南交通大学,四川成都610031 [3]四川省林业调查规划院,四川成都610081

出　　处：《灾害学》2013年第4期114-119,共6页Journal of Catastrophology

基　　金：中国地质调查局项目"大渡河流域地质灾害详细调查成果集成与综合研究"(1212011220131);国家自然科学基金(41101086)

摘　　要：四川泸定县城羊圈沟为一条高频中等规模暴雨性泥石流沟道。该沟所处区域构造强烈,降雨量充沛,物源类型丰富,高差大,汇水条件良好,具备爆发泥石流的形成条件。在动力学特征分析中运用三种不同的方法对泥石流流速进行了计算和分析。三种流速计算方法分别基于半理论与统计结合、理论推导计算、经验公式。三种的流速计算方法较好地反映了流速的真实值。基于不同的流速值,开展了相应的流量、撞击力、输沙量计算,得出了羊圈沟动力学特征的定量值。在动力学特征分析的基础上,对羊圈沟的监测预警提出建议,为海拔控制的雨量计和专业泥位计相结合的方案。Yangjuan gully in Luding County of Sichuan is a high-frequency medium scale rainstorm debris flow gully. The region around the gully is of tectonic intensity, abundant rainfall, types of material source, high elevation, and good condition of catchment, with the outbreak of debris flow formation conditions. The three different methods on velocity of debris flow in dynamics characteristic analysis are calculated and analyzed. Three kinds of flow velocity calculation method based on theory and statistics respectively, theoretical calculation, empirical for- mula, which can reflect the real value of velocity. Based on different velocity values, flow rate, the force of im- pact, sediment are calculated and the dynamic characteristics of the quantitative value of the Yangjuan gully are got. Based on the dynamics characteristic analysis, monitoring and early warning of elevation control gauge and pro- fessional mud meter combining scheme is suggested. The monitoring method can have a definite object in view to carry out monitoring and early warning for Luding City, and provide the technical support for disaster prevention and reduction.

关 键 词：羊圈沟 泥石流 流速 动力学 监测预警 

分 类 号：P694[天文地球—地质学] X43[环境科学与工程—灾害防治]