河床糙率 [水利] bed roughness
出糙率 brown rice recovery ; percentage of brown rice ; husked rice yield ; [粮食] brown rice yield
河道糙率 channel roughness
水力糙率 [水利] hydraulic roughness ; Roughness hydraulic
比糙率 specific roughness ; Roughness specific
曼宁糙率系数 Manning roughness factor ; Manning roughness coefficient ; Manning coarse rate
糙率系数 roughness coefficient
底部糙率型 shape of bottom roughness
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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。
The experiment results show that the threshold velocity is affected by the ratio of roughness coefficient of ice cover and bed.
影响汊道分流比的主要因素有：两汊的比降、过水断面积、糙率、流速等。
Main factors effecting on flow rate in braided river is gradient of anabranch, area of water, roughness and velocity.
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。
With combining optimization method, an optimal model of determining synthetic surface roughness coefficient in film hole irrigation was developed.
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