毛乌素沙地植被覆盖率与风蚀输沙率定量关系

doi:10.11821/xb200106009

摘要/Abstract

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

黄富祥, 牛海山, 王明星, 王跃思, 丁国栋. 毛乌素沙地植被覆盖率与风蚀输沙率定量关系[J]. 地理学报, 2001, 56(6): 700-710.

HUANG Fu-Xiang, NIU Hai-Shan, WANG Ming-Xing, WANG Yue-si, DING Guo-dong. The Relationship Between Vegetation Cover and Sand Transport Flux at Mu Us Sandland[J]. Acta Geographica Sinica, 2001, 56(6): 700-710.

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