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应用生态学报 ›› 1994, Vol. 5 ›› Issue (1): 43-45.

• 研究论文 • 上一篇    下一篇

林带阻力系数与透风系数关系的理论分析

周广胜, 朱廷曜   

  1. 中国科学院沈阳应用生态研究所, 沈阳 110015
  • 收稿日期:1993-04-29 修回日期:1993-10-18 出版日期:1994-01-25 发布日期:1994-01-25
  • 基金资助:

    国家自然科学基金

Theoretical analysis on the relation of drag coefficient to permeability of windbreaks

Zhou Guangsheng, Zhu Tingyao   

  1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1993-04-29 Revised:1993-10-18 Online:1994-01-25 Published:1994-01-25

摘要: 根据冲量定理分析了林带对气流的阻力,首次得到了林带阻力系数的估算模式(Cd=(1.8+0.2α)(1-α)sin2ω,并利用有关文献发表的资料进行了验证。文章还对来流平行林带时林带对气流的阻力进行了讨论,指出来流平行林带时林带对气流的阻力仅为来流垂直林带时林带对气流阻力的0.7-1.1%,可以不予考虑。

关键词: 林带阻力, 阻力系数, 透风系数, 土壤重金属含量, 玉树县, 高光谱影像, 植被光谱反射率, 偏最小二乘回归

Abstract: The drag of windbreak is analysed by impulse theorem in this paper.A simulation model of drag coefficient of windbreak,Cd=(l.8+0.2a)(1-a)sin2ω,is presented, and it is tested in terms of those data from published papers.A parallel-force of windbreak is also discussed.The parallel -force of windbreak whose value is 0.7—1.1% of the normal force can be neglected.

Key words: Drag of windbreak, Drag coefficient of windbreak, Permeability of windbreak, soil heavy metal concentrations, partial least squares regression (PLSR), Yushu County., vegetation spectral reflectance, hyperspectral images