山区铁路小流域暴雨径流计算方法浅析

Analysis on the Calculation Method of Rainstorm Runoff in Small Watershed of Railway in Mountainous Area

以新建池黄铁路为工程背景,介绍了暴雨径流的几种常见计算方法,在此基础上,分别利用铁四院法、安徽84办法、黄山经验公式法、推理公式法进行水文计算工点的设计流量计算与结果对比分析。同时,在线路沿线选择了几处有验证条件的工点,根据洪痕调查,利用形态勘测的方法计算设计流量,通过理论计算方法和形态勘测的方法设计流量计算结果的对比分析,间接验证理论计算方法的合理性,从而选择适合于本工程的桥涵小流域暴雨径流计算方法。

Taking the newly built Chi-Huang Railway as the engineering background,this paper introduces several common calculation methods of rainstorm runoff calculation,on the basis of which,using tiesiyuan method,Anhui 84 method,Huangshan empirical formula method and inference formula method respectively,carries on the design discharge calculation of hydrologic calculation station and the comparative analysis of the results.At the same time,several work points with verification conditions are selected along the line,and the design flow rate is calculated by means of morphological survey according to flood trace investigation.The rationality of the theoretical calculation method is indirectly verified by the comparison and analysis of the calculation results of the theoretical calculation method and the morphological survey method.Thus,the calculation method of storm runoff in bridge and culvert watershed is selected.