Aerodynamics roughness length is one of important indexes for estimating topsoil erosion.
耕作土壤表面空气动力学粗糙度是评价土壤可蚀性的重要指标。
Vegetation characteristics, such as height, density, coverage, lateral coverage of vegetation are closely related to the aerodynamic roughness length.
植被高度、密度、覆盖度、侧影盖度等特征，通过影响下垫面空气动力学粗糙度来达到抑制风蚀的效果。
The amount of the departure may not necessarily be large, but it results in the larger errors when the profiles are used to calculate the bed roughness length and shear stress.
虽然偏离值可能不大，但利用对数剖面去计算河底粗糙长度和剪切应力时会引起较大的误差。
On the basis of those work, we continue to simulate and discuss the changes of heat island intensity caused by artificial heat source, aerodynamic roughness length and wind speed.
在此基础上，模拟并探讨了人为热源、风速、地面粗糙度等因素对城市热岛强度的影响。
Roughness length during the flood phase is larger than that during the ebb phase, whilst shear velocity during the flood phase is smaller than that during the ebb phase.
涨潮阶段床面粗糙长度大于落潮阶段， 涨潮阶段摩阻流速小于落潮阶段。
Roughness length during the flood phase is larger than that during the ebb phase, whilst shear velocity during the flood phase is smaller than that during the ebb phase.
涨潮阶段床面粗糙长度大于落潮阶段， 涨潮阶段摩阻流速小于落潮阶段。
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