输水管道设计中的糙率选取问题研究

分析了目前输水管道设计中糙率选取存在的问题，提出了不宜选用单一糙率进行管道水力学计算，而应综合考虑输水水质、水温、管材及制作工艺、管径大小等因素，选取能包络各种运行工况的一定范围的糙率上下限值，作为水力学计算参数，以保证管道输水工程既能在长期运行时达到设计流量，又能安全运行。

Roughness Selection in the Design of Water Conveyance Pipe

Some problems of roughness selection in the design of water conveyance pipe are discussed.It also included the viewpoint that a single roughness selection in pipeline hydraulics calculation is unsuitble and that the upper and lower limits of roughness considering various service conditions shall be selected based on water quality, temperature,silt concentration of the water conveyed,pipe material, pipe manufacturing techniques and pipe diameter, so as to ensure the design flow can be achieved during long term operation without failure.