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通过风洞实验,对风速廓线测定结果用最小二乘法进行相关性分析,由拟合方程系数得到了植被覆盖度的下下垫面的粗糙度,并重点讨论了粗糙度与风速、植被覆盖度以及高度与粗糙度的关系。研究结果表明:①粗糙度与植被覆盖度有很好的相关性,其函数表达式为Z0=0.00226+0.6473Vc0.4629②植被高度与空气动力学粗糙度服从幂函数关系Z0=0.8775h0.422。
Through the wind tunnel experiment, the wind speed profile was analyzed by the least squares method. The roughness of the lower surface of the vegetation coverage was obtained from the coefficient of the fitting equation. The roughness and wind speed, vegetation coverage Degree and the relationship between height and roughness. The results show that: (1) There is a good correlation between roughness and vegetation coverage, and its function is expressed as Z0 = 0.00226 + 0.6473Vc0.4629 ② Vegetation height and aerodynamic roughness follow the power function Z0 = 0.8775h0.422.