山坡表面糙率对尾矿库坡面汇流计算的影响分析

Analysis of the influence of the hill surface roughness on the tailings pond slope overland flow calculation

防洪工程是尾矿库安全运行的重要工程设施,尾矿库坡面汇流法是尾矿库洪水计算的主要方法,而山坡表面糙率是影响尾矿库坡面汇流的重要因素。为研究汇流区域内山坡表面糙率对尾矿库坡面汇流,尤其是洪峰流量的影响,采用MATLAB软件进行了不同山坡表面糙率下的坡面汇流计算,分析不同山坡表面糙率下洪峰流量的变化情况。结果表明,山坡表面糙率变化对洪峰流量的影响很大,且其减小时的影响尤为明显,尾矿库工程设计时应慎重考虑。

Flood control projects are important facility for safe operation of tailings pond.Tailings pond slope overland flow calculation is the main method for flood calculation,and the hill slope roughness is an important factor influencing tailings pond slope overland flow.In order to study the influence of the hill surface roughness on the overland flow of the tailings pond,especially on the flood peak discharge,MATLAB software is used to calculate the slope overland flow under different hill surface roughness and analyze the variation of flood peak discharge under different hill surface roughness.The calculation results show that the change of hill surface roughness has a great influence on the flood peak discharge,and the effect of roughness reduction is particularly obvious,which should be taken into serious account when tailings pond is designed.