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中国沙漠 ›› 1996, Vol. 16 ›› Issue (3): 276-281.

• 研究论文 • 上一篇    下一篇

六道沟流域土壤水分抗风蚀性分析

董治宝, 李振山   

  1. 中国科学院兰州沙漠研究所, 兰州 730000
  • 收稿日期:1995-08-07 修回日期:1996-01-06 出版日期:1996-09-20 发布日期:1996-09-20

ANALYSIS OF THE MOSITURE-BASED RESISTANCE OF THE SOIL TO WIND EROSION IN LIUDAOGOU MICRO-RIVER BASIN

Dong Zhibao, Li Zhenshan   

  1. Institute of Desert Research, Chinese Academy of Sciences, Lanzhou 730000
  • Received:1995-08-07 Revised:1996-01-06 Online:1996-09-20 Published:1996-09-20

摘要: 根据在六道沟流域采集的土样进行土壤水分对风蚀影响的风洞模拟实验结果, 建立了土壤风蚀率(风蚀强度)与土壤含水率的定量关系; 通过长期的各种土地类型的土壤水分监测及同步空气相对湿度观测, 建立了土壤表层(0~3cm)水分含量与空气相对湿度的相关关系; 进一步推导出土壤风蚀强度(风蚀率)随空气相对湿度的增加呈-8次幂函数减少的理论关系。最后, 按照风蚀强度与土壤含水率的关系及土壤水分监测结果分析和比较了各种土地类型的土壤水分抗风蚀性; 根据土壤风蚀强度与空气相对湿度应具有的理论关系及空气相对湿度的详细观测资料分析了土壤水分抗风蚀性的时间变化特征。

关键词: 土壤水分, 抗风蚀性, 土壤含水率, 空气相对湿度

Abstract: In this paper, the relationship between wind erosion rate(wind erosion intensity)and soil moisture content was established by the experiment in wind tunnel, and that between soil moisture(0~3 cm depth) content and the relatibe humidity was made out through long-term soil moisture monitoring and the related observation of the atmospheric relative humidity. Then it is derived that the wind erosion rate reduces with an increase of the atmospheric relative humidity by the negative eighth power function. Finally the moisture-based resistance of soils to wind erosion for distribution of the moisture-based resistance of soil to wind ersion was also analysed according to the results of the atmospheric humidity obained from the meteorological station in Liudaogou.

Key words: Wind erosion, Soil moisture content, Atmospheric relative humidity