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探讨了山区水利水电工程中经常遇到的确定河道糙率问题，总结了糙率选定的基本方法，初步分析了河道糙率变化规律，介绍了部分水电工程的糙率推求方法、结果及体会。
This paper discusses the problem of determining the roughness of river course frequently encountered in mountainous water conservancy and hydropower projects, summarizes the basic methods for selecting roughness, analyzes the variation law of roughness of river course first, and introduces the method, result and experience of estimating the roughness of some hydropower projects .