地理学报 ›› 2001, Vol. 56 ›› Issue (6): 700-710.doi: 10.11821/xb200106009

• 自然环境变化 • 上一篇    下一篇

毛乌素沙地植被覆盖率与风蚀输沙率定量关系

黄富祥1, 牛海山21, 王明星1, 王跃思3   

  1. 1. 中国科学院大气物理所, 北京100029;
    2. 中国科学院地理科学与资源研究所,北京100101;
    3. 北京林业大学水保学院,北京100083
  • 收稿日期:2001-06-19 修回日期:2001-10-23 出版日期:2001-11-25 发布日期:2010-09-09
  • 作者简介:黄富祥(1967—), 男, 博士后, 主要从事生态建模, 土壤风蚀和沙尘暴方面的研究。E-mail: hfx1121@sina.com
  • 基金资助:

    中科院王宽诚博士后奖励基金项目; 中科院创新重点项目(00-0277-0165)

The Relationship Between Vegetation Cover and Sand Transport Flux at Mu Us Sandland

HUANG Fu-Xiang1, NIU Hai-Shan21, WANG Ming-Xing1, WANG Yue-si3   

  1. 1. LAPC, Institute of Atmospheric Physics, CAS, Beijing 100029, China
    2. CERN, Institute of Geographic Sciences and Natural Resource Research, CAS, Beijing 100101, China
    3. Water and Soil Conservation College, Beijing Forestry University, Beijing 100083, China
  • Received:2001-06-19 Revised:2001-10-23 Online:2001-11-25 Published:2010-09-09
  • Supported by:

    The Chinese academy of sciences K.C.Wong Post-doctoral research Award Fund and the key innovation project of the Chinese academy of sciences, No. 00-0277-0165.

摘要:

基于毛乌素沙地不同植被覆盖条件下的风蚀输沙率实地观测数据, 借鉴国外最新的建模思想, 采用Matlab5.3软件对数据进行非线性回归,建立毛乌素沙地植被覆盖率与风蚀输沙率之间的定量关系模型, 比较系统地考察了植被覆盖对沙粒起动风速和风蚀输沙率的影响, 确定了不同风速下的有效植被覆盖率。结果表明, 在毛乌素沙地要有效减少和防治风蚀, 植被覆盖率必须达到40 ~ 50 %的水平, 而要保证在最高风速下风蚀输沙得到有效控制, 植被覆盖率必须达到60 ~ 70 %的水平。

关键词: 毛乌素沙地, 风蚀, 沙粒起动风速, 输沙率, 植被覆盖, 有效植被覆盖率

Abstract:

Wind erosion has played the major role in shaping Mu Us landscape. Although Mu Us Sand land is a hot spot, of research, the detail of wind erosion in Mu Us has been poorly understood. On the basis of observations in Mu Us Desert, we determine the threshold of wind velocity and present sand transport equations on bare and vegetated land. Furthermore, we discuss the quantitative relationship between vegetation cover and sand transport. We get a quite good understanding of the effect of vegetation on wind erosion.

Key words: Mu Us sandland, wind erosion, threshold velocity of sand transport, sand transport flux, effective vegetation cover