Soil Erosion Process on Hillslopes of Purple Soil Under Different Near-Surface Hydrological Conditions

WANG Zhi-gang; ZHENG Fen-li; LI Jing

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Soil Erosion Process on Hillslopes of Purple Soil Under Different Near-Surface Hydrological Conditions

- Soil Erosion Process on Hillslopes of Purple Soil Under Different Near-Surface Hydrological Conditions
- Bulletin of Soiland Water Conservation Vol. 26, Issue 6, Pages: 9-79(2007)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院
  2. 西北农林科技大学资源环境学院陕西杨凌,712100
  3. ,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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WANG Zhi-gang, ZHENG Fen-li, LI Jing. Soil Erosion Process on Hillslopes of Purple Soil Under Different Near-Surface Hydrological Conditions[J]. Bulletin of Soiland Water Conservation, 2007, 26(6): 9-79.
DOI：

WANG Zhi-gang, ZHENG Fen-li, LI Jing. Soil Erosion Process on Hillslopes of Purple Soil Under Different Near-Surface Hydrological Conditions[J]. Bulletin of Soiland Water Conservation, 2007, 26(6): 9-79. DOI：

摘要

采用模拟降雨试验

研究了自由下渗(free drainage)、土壤水分饱和(saturation)、壤中流(seepage) 3种近地面水文条件下紫色土坡面土壤侵蚀过程。结果表明

近地表水文条件会对紫色土坡面侵蚀过程产生重要影响。在地面坡度5°～15°条件下

当地表水文条件由自由下渗演变为土壤水分饱和时

坡面侵蚀量由1.31～2.02 g/(min·m

)增加到1.83～5.50 g/(min·m

);当地表水文条件由土壤水分饱和变为壤中流时

坡面侵蚀量达到4.40～16.41 g/(min·m

)。土壤水分饱和条件下坡面侵蚀量是自由下渗的1.40～2.73倍;壤中流条件下坡面侵蚀量是自由下渗时的3.36～8.12倍

是土壤水分饱和时的2.40～2.98倍。同时

坡面坡度对紫色土坡面侵蚀过程有重要的影响。

Abstract

Soil erosion processes on hillslopes of purple soil under three near-surface hydrological conditions of free drainage

saturation and seepage were studied by stimulated rainfall experiments.Results showed that near-surface hydrological conditions greatly affecting soil erosion processes on hillslopes of purple soil.At slope gradients from 5° to 15°

erosion rate from hillslopes shif ted from 1.31 2.02 g/(min?m2) under free drainage to 1.83 5.50 g/(min?m2) under saturation condition; under seepage condition

erosion rate reached to 4.40 16.41g/(min?m2).Erosion rate under saturation condit ion was 1.40 2.73 times greater than that under free drainage; erosion rate under seepage condition was 3.36 812 times greater than that under free drainage and was 2.40 2.98 times higher than that under saturation condition.Meanwhile

slope gradient had a great impact on purple soil erosion processes.

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