矮子沟泥石流影响因素及运动参数分析

Research on Influential Factors and Dynamic Characteristics of a Debris Flow in Aizi Gully

通过对矮子沟流域进行现场勘查,收集相关气象及水文等资料,获取矮子沟流域的地形地貌特征、不良地质体分布规律、地震活动等数据,结合矮子沟流域的地质条件及降雨特征,对矮子沟泥石流的影响因素进行分析,探讨矮子沟泥石流的形成过程。在此基础上选取五个典型断面结合经验公式进行运动参数的分析计算,经计算沟口处断面的泥石流的流速为7.54 m/s,流量为948.63 m3/s,此次泥石流总量为60.08万m3,这些运动参数可以为矮子沟泥石流防治方案的选择及防治工程的设计提供参考。

After the field survey in Aizi gully and relevant data collection, the data about the morphology, bad geology distribution rules and earthquake activity history in Aizi gully are obtained, and combined with the geological conditions and rainfall characteristics of the gully, the influential factors for a debris flow of the gully are analyzed, then the forming process of the debris flow of the gully is discussed. Based on the analysis mentioned above, five typical cross-sections are selected together with empirical formula so as to calculate the related dynamic parameters. Through the calculation, it is obtained that the velocity and discharge at the outlet are 7.54 m·s^- 1 and 948.63 m3· s^- 1 respectively, and the total vol- time of this debris flow is 60.08 x 10^4 m^3. All these dynamic parameters could play an important role in the selection of nreve, ntion measures and the desizn of orevention nroiects for the debris flow of Aizi aullv.