天然河道糙率是洪水计算过程中一个较为重要的参数,结合工作实际阐述了天然河道糙率确定的原理与方法,通过分析可以发现,影响河道糙率的因素非常多,水深、植被情况、河床断面等都会糙率的取值存在不同程度的影响,在确定河道糙率的实际工作过程中,必须结合河道情况,将所确定的糙率值与参考值进行反复比对,不断修正,才能保证所确定的糙率具有较高的精确度。 The natural river roughness is a more important parameter in flood calculation process. Combining with the actual work, the principle and method of determining the roughness of natural river are expounded. It can be found through analysis that there are many factors that affect the roughness of river course. Water depth, vegetation condition, riverbed Section and so will have varying degrees of roughness value of the actual impact of the process of determining the roughness of the river course, we must combine the case of the river, the determined roughness value with the reference value repeatedly, and constantly revised in order to ensure The determined roughness has a higher degree of accuracy.