roughness coefficient

基本解释

When F is larger than 12.2371, the vegetation roughness coefficient and drag coefficient decrease as F increases.
若植被抗弯指数F值大于12.2371，植被糙率系数和阻力系数随F值的增大而减小。
After that, the authors take Beishan of Gansu province for the HLW disposal area as the example, and measure the joint roughness coefficient(JRC) of surface rock mass and cores of borehole.
文章评述了现有岩体结构面粗糙度系数（JRC）的各种测定方法及存在的问题，分析了在高放废物处置库预选场址甘肃北山花岗岩地区，用“简易纵剖面仪”进行地表岩体及钻孔岩心裂隙结构面JRC的测量结果。
The roughness coefficient as an important parameter is very critical and useful to the hydraulic engineering whenever on the stage of design, construction, operation and management of the project.
糙率系数作为水力计算中一个至关重要的参数，对其变化规律及取值范围的研究是进行各种水利工程设计、施工、运行和管理过程中的重要工作。