Assessing the vegetation canopy influences on wind flow using wind tunnel experiments with artificial plants

作者：Hong Youngjoo; Kim Dongyeob; Im Sangjun^*

来源：Journal of Earth System Science, 2016, 125(3): 499-506.

DOI：10.1007/s12040-016-0684-z

• Wind erosion
• roughness length
• shear velocity ratio
• shear stress ratio
• roughness density
• wind tunnel

Wind erosion causes serious problems and considerable threat in most regions of the world. Vegetation on the ground has an important role in controlling wind erosion by covering soil surface and absorbing wind momentum. A set of wind tunnel experiments was performed to quantitatively examine the effect of canopy structure on wind movement. Artificial plastic vegetations with different porosity and canopy shape were introduced as the model canopy. Normalized roughness length (Z(0)/H) and shear velocity ratio (R) were analyzed as a function of roughness density (lambda). Experiments showed that Z(0)/H increases and R decreases as lambda reaches a maximum value, lambda(max), while the values of Z(0)/H and R showed little change with lambda value beyond as lambda(max).

• 出版日期2016-4