Assessing the vegetation canopy influences on wind flow using wind tunnel experiments with artificial plants |
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| Authors: | YOUNGJOO HONG DONGYEOB KIM SANGJUN IM |
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| Institution: | 1.Department of Forest Sciences, Research Institute of Agriculture and Life Sciences,Seoul National University,Seoul,Republic of Korea.;2.Division of Forest Disaster Management,National Institute of Forest Science,Seoul,Republic of Korea.;3.GimpoJeil High School,Gimpo-si, Gyeonggi-do,Republic of Korea. |
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| Abstract: | 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 (λ). Experiments showed that Z 0/H increases and R decreases as λ reaches a maximum value, λ max, while the values of Z 0/H and R showed little change with λ value beyond as λ max. |
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