A Study on Rainfall Erosion and Runoff Erosion

Zheng Fenli

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A Study on Rainfall Erosion and Runoff Erosion

- A Study on Rainfall Erosion and Runoff Erosion
- Bulletin of Soiland Water Conservation Vol. 17, Issue 6, Pages: 17-21(1998)
- 作者机构：
  
  中国科学院水利部水土保持研究所,陕西杨陵,712100
- 作者简介：
- 基金信息：
- DOI：
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- Published：1998
- 稿件说明：
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Zheng Fenli. A Study on Rainfall Erosion and Runoff Erosion[J]. Bulletin of Soiland Water Conservation, 1998, 17(6): 17-21.
DOI：

Zheng Fenli. A Study on Rainfall Erosion and Runoff Erosion[J]. Bulletin of Soiland Water Conservation, 1998, 17(6): 17-21. DOI：

摘要

降雨侵蚀过程包括径流侵蚀作用和雨滴打击作用两个方面

传统的单径流小区降雨试验难以区分二者对坡面侵蚀的贡献。通过双土槽人工降雨试验

研究了降雨侵蚀和径流侵蚀的关系及二者对坡面侵蚀产沙的贡献。结果表明: 在坡度和降雨强度一定时

坡上方来水量引起坡下方侵蚀产沙量随着上方来水量的增大而增大; 在坡度一致和坡面径流量基本相同时

降雨侵蚀产沙量大于供水径流的侵蚀产沙量

降雨强度增大1倍时

坡面侵蚀产沙量增大约50%; 雨滴打击作用引起的侵蚀量占降雨侵蚀量27.2%～45.8%

雨滴打击作用对坡面侵蚀产沙量的贡献受降雨强度和侵蚀方式的影响。

Abstract

Rainfall erosion process can be divided into-different aspects

runoff washing and raindro pimpact

but their contribution to soil erosion can not be determined accurately under the condition of conventional rainfall simulation with single runoff plot.Relationships between rainfall erosion and runoff erosion and their contribution to soil erosion have been researched by using rainfall simulation with dual runoff plots.The research results show that under the same slope gradient and rainfall intensity

the sediment delivery in down-slope caused by runoff water from up-slope will increase with the increase of runoff water from up-slope.Under the condition of same slope steepness and runoff

sediment delivery caused by rainfall erosion is bigger than that caused by feeding runoff washing.Sediment delivery has increased by 50% when rainfall intensity increases 1 time. Sediment production caused by raindrop impact takes up 27.2%～45.8% of total rainfall erosion

contribution from raindrop impact to sediment production is affected by rainfall intensity and erosion pattern.

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references

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3　Ellison W D.Soil erosion study-Part V:Soil Transport in the splash process.Agric.Eng.1947c,28:349-351,353

4　Ellison W D,Ellison OT.Soil erosion study-Part VI:Soil detachment by surface flow.Agric.Eng .1947d,28:403-405,408

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7　郑粉利,唐克丽,张成娥.降雨动能对坡耕地细沟侵蚀影响的研究.人民黄河,1995,17(7)

8　Gabbard DS,Huang C,Norton LD,Steinhardt GC. Landscape position,surface hydraulic gradients and erosion processes. Earth Surf.Processes Landforms,1998,23:83-93

9　Foster GR,Eppert FP,Meyer LD.A programm able rainfall simulator for field plots.1979,45-49.Agric.Rev.and Manuals ARM-W-10.USDA-ARS.Western Region.Oakland.CA

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