1) roughness coefficient
糙率系数
1.
Determination on the roughness coefficient of Wutong River natural river course;
梧桐河天然河道糙率系数的确定
2.
Velocity distribution on a rough bed is more non-uniform than that on a smooth bed, the turbulence intensity distribution of non-uniform flow becomes uniform with increase of the relative depth, and the regularities of the roughness coefficients of non-uniform flow on a rough bed are.
粗糙床面非均匀流的水槽试验表明,非均匀流断面的垂线流速分布需用两个对数公式分别描述;粗糙床面的流速分布较光滑床面不均匀;非均匀流的紊流度分布随相对水深的增大而趋于均匀;粗糙床面非均匀流糙率系数的变化规律与光滑床面近似。
3.
It is clearly that the roughness coefficient needs to be corrected in hydraulic calculations for open channel flow.
根据明渠水流流动型态的概念,通过对实验资料的分析,得到均匀流时糙率系数随水深增加而减小,形成M1型水面线的非均匀流时糙率系数随水深、水力坡度的增大而增大的规律。
2) Manning roughness factor
曼宁糙率系数
3) synthesis roughness coefficient
综合糙率系数
1.
Study on field synthesis roughness coefficient for laden surge flow border irrigation;
浑水波涌畦灌田面综合糙率系数研究
4) surface roughness coefficient
地表糙率系数
1.
The surface roughness coefficients of 11 typical stands were quantified by using the Manning Formula for field experiments during the year 2002 and 2003 in Xiangshuixi watershed, Three Gorges Region,at Jiangjin City of Chongqing Municipality.
2 0 0 2— 2 0 0 3年期间 ,作者选择三峡库区响水溪流域 1 1块具有典型代表性的林地 ,在野外小区径流实验基础上 ,通过曼宁公式 ,对地表糙率系数进行了定量研究 。
5) roughness parameter
糙率参数
1.
To detect the effect of roughness parameters in real time correction for flood forecasting, and improve the accuracy of hydraulic forecasting model,the Kalman filter was applied to realize the real time correction of the roughness parameters by the momentum equation.
针对洪水预报中糙率参数的实时修正问题,采用卡尔曼滤波技术,实现动量方程实时校正糙率参数,以提高水动力学模型的洪水预报精度。
6) synthetic surface roughness coefficient
田面综合糙率系数
1.
With combining optimization method, an optimal model of determining synthetic surface roughness coefficient in film hole irrigation was developed.
根据膜孔灌溉田面水流运动特性 ,建立了膜孔灌溉田面水流运动零惯性量数学模型 ,并将其与优化理论相结合 ,提出了确定膜孔灌溉田面综合糙率系数的优化模型。
补充资料：糙率
见谢才公式。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条