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中国沙漠 ›› 2007, Vol. 27 ›› Issue (6): 1022-1026.

• 生物土壤与生态 • 上一篇    下一篇

塔里木河下游不同覆盖度灌木防风固沙功能野外观测研究

程 皓;李 霞*;侯 平;裴玉亮   

  1. 新疆农业大学林学院, 新疆 乌鲁木齐 830052
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-11-20 发布日期:2007-11-20
  • 通讯作者: 李 霞

Field Investigation on Function of Reducing Wind and Stabilizing Sand under Different Vegetation Cover in Lower Reaches of Tarim River

CHENG Hao; LI Xia; GOU Ping; PEI Yu-liang   

  1. Collage of Forest, Xinjiang Agriculture University, Urumqi 830052, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-11-20 Published:2007-11-20
  • Contact: LI Xia

摘要: 对塔里木河下游50%、25%、10%三种覆盖度灌木降低风速观测结果表明: 50%覆盖度灌木降低风速最明显,防风效能为49.21%;25%的覆盖度灌木降低风速较明显,防风效能为24.44%;10%的覆盖度灌木对风速降低有一定作用,防风效能为9.15%。在7.7 m.s-1风速下,植被覆盖度为10%、25%的沙地输沙率分别是无植被覆盖沙地的62.44%和8.37%;在10 m.s-1风速下,植被覆盖度50%的沙地仅有轻微的风蚀。根据塔里木河下游不同覆盖度植被与降低风速之间的定量关系,得出不同风速条件下的有效植被覆盖率,在研究区常见10~15 m.s-1风速条件下,要达到有效阻沙效果,植被覆盖率应在50%以上。

关键词: 灌木, 有效植被覆盖度, 防风效应, 塔里木河下游, 模型

Abstract: Investigation into the effect on reducing wind under three kinds of different vegetation coverage(50%,25%,10%) in lower reaches of the Tarim River shows that their effect are respectively 49.21%, 24.44% and 9.15%. Under wind velocity of 7.7 m\5s-1, the sand transporting rate over vegetation coverage of 10% and 25% is respectively 64.44% and 8.37% of that over non-vegetation cover; Under wind velocity of 10 m\5s-1, only slight wind erosion occurred on the land with 50% vegetation coverage. Quantitatively analysis on the relationship between different vegetation coverage and reduction of wind velocity shows the effective vegetation degree of coverage. Under the common wind velocity (10~15 m\5s-1), the effective vegetation coverage should be above 50% for preventing wind erosion.

Key words: shrub, effective vegetation degree of coverage, wind reducing effect, lower reaches of the Tarim River, model

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