1·That is, the roughness coefficient decreased with the increase of Reynolds on steep slope.
在坡度较大时，阻力系数随雷诺数的增大而增大。
2·The results show that the Manning roughness coefficient increases with increasing water depth.
试验结果表明，曼宁粗糙系数随水深深度的增加而增加。
3·The wetted perimeter of this section is 83.7% of the rectangle in the same discharge, reach slope, roughness coefficient.
在同样水力条件下，最优园底直角断面的湿周是矩形最优断面的83.7%。
4·The experiment results show that the threshold velocity is affected by the ratio of roughness coefficient of ice cover and bed.
试验表明：冰盖下泥沙起动流速与冰盖及槽底糙率的相对比值有关。
5·The roughness coefficient increases when the relative roughness of the surface becomes larger under the same condition of discharge.
对于不同粗糙程度的壁面，在同一流量条件下的糙率系数会随着相对粗糙度的增大而增大。
6·With combining optimization method, an optimal model of determining synthetic surface roughness coefficient in film hole irrigation was developed.
实例计算与方法验证表明，该方法能够简单而有效地确定膜孔灌溉田面综合糙率系数。
7·A simpler fractal model to estimate the joint roughness coefficient (JRC) is suggested. It can be applied to simulate rock discontinuity profiles.
提出了一种更为简单的估算岩石断裂面粗糙度(jrc)值的分形模型，可用来模拟岩石断裂面剖面线。
8·Border irrigation current advancement process model plays an important role to determine irrigation technical index, average field infiltration rate and roughness coefficient.
畦灌水流推进过程计算模型对确定灌水技术要素、田间平均入渗率和糙率有十分重要的作用。
9·It is also found that, when the water depth is fixed, the Manning roughness coefficient increases as the longitudinal pier spacing increases up to approximately the pier width.
值得一提的是，当水深维持不变时，曼宁粗糙系数也会持续增加直至纵向基桩间距与其宽度相同为止。
10·We also find the obvious effectiveness of Gabion revetment. Analyzing actual measurement data, find out the roughness coefficient of Gabion revetment, to provide suggestion for revetment design.
试验发现格宾护岸对减小波浪爬高具有明显的作用，通过实测和统计分析得出了格宾材料的糙渗系数，为护岸设计提供参考。