Effect of Vegetation on Rainfall Infiltration and Runoff Erosion and Sediment Yield in Gravel Soil Slope

XIA Zhenyao; LIANG Yongzhe; NIU Penghui; XU Wennian; GAO Jiazhen; LI Bo

doi:10.13961/j.cnki.stbctb.2016.03.016

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Effect of Vegetation on Rainfall Infiltration and Runoff Erosion and Sediment Yield in Gravel Soil Slope

- Effect of Vegetation on Rainfall Infiltration and Runoff Erosion and Sediment Yield in Gravel Soil Slope
- Bulletin of Soiland Water Conservation Vol. 36, Issue 3, Pages: 88-93(2016)
- 作者机构：
  
  1. 三峡地区地质灾害与生态环境湖北省协同创新中心,湖北,宜昌,443002
  2. 三峡大学土木与建筑学院,湖北,宜昌,443002
  3. 三峡大学水利与环境学院,湖北,宜昌,443002
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2016.03.016
  CLC：
- Published：2016
- 稿件说明：
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XIA Zhenyao, LIANG Yongzhe, NIU Penghui, et al. Effect of Vegetation on Rainfall Infiltration and Runoff Erosion and Sediment Yield in Gravel Soil Slope[J]. Bulletin of Soiland Water Conservation, 2016, 36(3): 88-93.
DOI：

XIA Zhenyao, LIANG Yongzhe, NIU Penghui, et al. Effect of Vegetation on Rainfall Infiltration and Runoff Erosion and Sediment Yield in Gravel Soil Slope[J]. Bulletin of Soiland Water Conservation, 2016, 36(3): 88-93. DOI： 10.13961/j.cnki.stbctb.2016.03.016.

摘要

［目的］研究植被对含碎石土壤坡面入渗和径流侵蚀的影响，为合理配置三峡地区含碎石土壤坡面植被提供科学依据。［方法］在建立的径流小区内铺设含碎石土壤，并配置不同种类、不同覆盖度的植被，进行人工降雨试验。［结果］各类小区径流量排序为：裸坡 > 灌木坡面 > 草本坡面 > 草灌混合坡面，入渗量与径流量排序相反，有植被覆盖坡面的壤中流大于裸坡；入渗率服从对数函数规律，产流强度呈幂函数变化；草地对水沙的调控机制更多的是直接拦沙；累计径流量和累计侵蚀量的关系均满足幂函数形式。［结论］植被措施可有效地减少含碎石土壤坡面的水土流失，不同的植被措施减少的效益不同。

Abstract

[Objective] Studying the influences of vegetation on rainfall infiltration and runoff erosion and sediment yield in order to provide a scientific basis for rationally allocating the vegetation in gravel soil slope in the Three Gorges area.[Methods] Runoff plots containing gravel soil were set with different types and coverage of vegetation. Artificial rainfall experiments were conducted.[Results] The amount of runoff showed as follows bare slope > shrub slope > herb slope > grass shrub mixed slope

in contrast

infiltration and runoff showed the opposite trend. The interflow in vegetation-covered slope was greater than that in the bare slope. Infiltration rate obeyed the law of logarithmic function

while the runoff yield strength varied as power function. The regulation mechanism of grassland to water and sediment was mostly direct sad blocking. The relationship between cumulative runoff and cumulative sediment yield showed as the power function.[Conclusions] Vegetation measures can effectively reduce soil and water loss in gravel soil slope

and different vegetation measures represent the different reducing benefits.

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