Effect of Different Land Use On Soil and Water Loss Processes On Purple Steep Slopeland

Cai Qiangguo; Wu Shu’an

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Effect of Different Land Use On Soil and Water Loss Processes On Purple Steep Slopeland

- Effect of Different Land Use On Soil and Water Loss Processes On Purple Steep Slopeland
- Bulletin of Soiland Water Conservation Vol. 17, Issue 2, Pages: 1-8(1998)
- 作者机构：
  
  中国科学院&国家计委地理研究所,北京市,100101
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1998
- 稿件说明：
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Cai Qiangguo, Wu Shu’an. Effect of Different Land Use On Soil and Water Loss Processes On Purple Steep Slopeland[J]. Bulletin of Soiland Water Conservation, 1998, 17(2): 1-8.
DOI：

Cai Qiangguo, Wu Shu’an. Effect of Different Land Use On Soil and Water Loss Processes On Purple Steep Slopeland[J]. Bulletin of Soiland Water Conservation, 1998, 17(2): 1-8. DOI：

摘要

在天然降雨观测基础上，通过模拟降雨试验探讨了紫色土陡坡地不同土地利用对水土流失过程的影响。实测资料揭示暴雨和坡长是导致紫色土陡坡地水土流失的重要因素，高强度降雨在10m坡长坡耕地上会引起强烈的细沟侵蚀。在暴雨情况下，25°陡坡耕地上，一年生植物活篱笆可以使径流量减少22%～43%

侵蚀产沙量减少94%～98%.石坎水平梯田比陡坡耕地的径流量减少62%～67%

侵蚀产沙量减少97.8%～99%.植物活篱笆可以很大地减少陡坡地土壤流失，其投资仅是石坎水平梯田的10%～20%

是三峡库区改良利用陡坡地，防治土壤流失的有效方法。

Abstract

Based on natural precipitation observations

impacts of different types of land use on processes of soil and water loss over purple soil related slopeland were studied by simulated rainfall experiments.Measurement data revealed that rainstorms and slope length are the essential factors accountable for soil and water loss on purple soil slopeland for intense rill erosion can be caused on 10 meter long purple soil slopes by high intensity rainfall.Under circumstances of rainstorms

annual hedge plants grown on 25°slopeland can cause a reduction of runoff by 22～43 percent and that of erosion induced sand content by 94～98 percent. Stone bunded horizontal terraces can lead to a runoff reduction by 62～67 percent in comparison with steep slopelands and that of erosion induced sediment by 97.8～99 percent.Soil and water loss can be substantially decreased on steep slopes by hedge plants with a cost of only 10～20 percent of that of the steep bunded horizontal terraces.Hence it is an effective way to control soil and water loss in terms of slopeland amelioration and utilization in the Three Gorges reservoir area

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