江苏省科技期刊可视化阅读平台

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江苏科技信息 ›› 2015, Vol. 32 ›› Issue (21): 54-56.doi: 10.3969/j.issn.1004-7530.2015.21.028

• 论文 • 上一篇    下一篇

地表植被覆盖与土壤大孔隙对地表径流影响实验分析

舒茂, 何国清   

  1. 江苏省有色金属华东地质勘查局,江苏南京,210007
  • 出版日期:2015-07-25 发布日期:2015-07-25

Experiment Analysis on Impact of Ground Vegetation and Soil Pores for Surface Runoff

Shu Mao, He Guoqing   

  • Online:2015-07-25 Published:2015-07-25

摘要： 地表植被与土壤大孔隙均为影响地表径流的重要因素，植被能够降低径流速度和流量，将对侵蚀程度有很大影响；大孔隙的存在，提高了降雨进入土壤的入渗率，而进入土壤中的水就绕过大部分土壤基质，加快了地下水的响应速度，地下水在土壤水还未达到田间持水量时就得到补充，改变了地表径流分配，对地表径流流速、流量均起到了抑制作用。文章采用室内土槽实验的方法人造大孔隙，在地表种植植被，通过人工降雨，从地表径流流量、流速及壤中流、地下水产生方式分析地表植被与土壤大孔隙对地表径流的影响程度，进一步认识地表植被及土壤大孔隙对水土保持的作用。

关键词: 地表植被, 地表径流, 水土保持

Abstract: There are two important factors to impact surface runoff. One is ground vegetation,another is soil pores. Vegetation can reduce the speed and flow of runoff,which make a strong impact to erodibility. The existence of soil pores improves the infiltration rate of the rainfall. The rain which enters into the soil bypasses most of the soil matrix and speeds up the response speed of groundwater. Groundwater was added before soil water has not yet reached to the field capacity. Thereby distribution of surface runoff was changed and velocity and flow of the surface runoff were both controlled. In this paper,we did the experiment of indoor soil box: made soil pores,artificial rainfall and planted vegetation on the surface. We analyzed the impact of ground vegetation and soil pores to surface runoff according to velocity,flow,subsurface flow and ground water formation. Then we get a further understanding that surface vegetation and soil pores play an important role in soil and water conservation.