粘性泥石流运动流速与流量计算

Calculation for Velocity and Discharge of the Viscous Debris Flow

粘性泥石流作为最常见的一种泥石流 ,普遍存在于固体物质组成松散、降雨持续集中的陡峻山区。作者首先对现有的粘性泥石流运动速度的有关成果进行扼要评述。根据曼宁公式的结构形式 ,通过对大量泥石流沟的实测资料进行统计分析 ,得出涉及参数较为全面、具有一定普遍意义的粘性泥石流运动速度公式 ,经验表明该公式的可靠度令人满意 ,据此提出粘性泥石流的流量公式及其计算方法 ,从而为泥石流灾害治理工程规划设计提供了科学依据。

Viscous debris flow usually occurs in the mantainuous area with steep slope and in the case of heavy rainfalls. After a brief review to the existing results, a new velocity formula with entiral factors and commonly practical meanings has been derived on the basis of the structural formation of Manning velocity formula,and its coefficients were established by large numbers of field data. Then, the velocity calculated by the formula is verified by many measured data including Jiangjia Ditch etc, and the discharge for viscous debris flow can be calculated by cross-section phase method. The presented results may be applied to planning and design of harnessing projects of debris flow.