Abstract
For very sparse tree land individual tree was the basic element of interaction between atmosphere and the surface. Drag of isolated tree was preliminary aerodynamic index for analyzing the atmospheric boundary layer of this kind of surface. A simple pendulum method was designed and carried out in wind tunnel to measure drag of isolated tree models according to balance law of moment of force. The method was easy to conduct and with small error. The results showed that the drag and drag coefficient of isolated tree increased with decreasing of its permeability or porosity. Relationship between drag coefficient and permeability of isolated tree empirically was expressed by quadric curve.
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Foundation item: This paper was supported by Chinese Academy of Sciences.
Biography: GUAN De-xin (1962-), male, Ph. Doctor, assistant research fellow of Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110015, P.R. China.
Responsible editor: Song Funan
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De-xin, G., Ting-yao, Z. & Shi-jie, H. Wind tunnel experiment of drag of isolated tree models in surface boundary layer. Journal of Forestry Research 11, 156–160 (2000). https://doi.org/10.1007/BF02855516
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DOI: https://doi.org/10.1007/BF02855516