[1]WANG Qiuxia,DING Shuwen,ZHAO Xin,et al.Studies on the Variation of Soil Antierodibility of Collapse Horizons of Weathered Earth in Granite Region[J].Research of Soil and Water Conservation,2015,22(03):6-9.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 03
Page number:
6-9
Column:
Public date:
2015-06-28
- Title:
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Studies on the Variation of Soil Antierodibility of Collapse Horizons of Weathered Earth in Granite Region
- Author(s):
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WANG Qiuxia1, DING Shuwen2,3, ZHAO Xin1, TONG Lisha1, WAN Yinkang1, ZHANG Yong2
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1. College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China;
2. Research Center of Soil and Water Conservation, Huazhong Agricultural University, Wuhan 430070, China;
3. Key Labrortory of Arable Land Conservation for Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China
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- Keywords:
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soil anti-erodibility; artificial rainfall simulation experiments; runoff; infiltration rate; sediment transport rate; particle size analysis
- CLC:
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S157.1
- DOI:
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- Abstract:
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Soil anti-erodibility is the ability to resist to the damage and removal from external forces, the stronger the anti-erodibility of soil is, the less erosion damages it suffers. This paper aimed to conduct the research on anti-erodibility of different soil layers developed from the granite in collapsed gullies through lots of artificial simulation of rainfall experiments with eluvial horizon, illuvial horizon and parent material horizon of collapsed gullies granite development in Tongcheng County and collecting runoff and sediment under certain rainfall intensity and slope conditions. The results showed that there was a significant anti-erodibility difference among eluvial horizon, illuvial horizon and parent material horizon of collapsed gullies granite development while the infiltration rate of different soil layers showed the stable difference, the stable infiltration rate of illuvial horizon was 1.25 times greater than the eluvial horizon and 2.27 times greater than the parent material horizon. The transport rates showed a sharp distinction. The average sediment transport rate of parent material horizon was 1.79 times greater than the illuvial horizon, 3.11 times greater than the eluvial horizon. Combining with analysis of physical and chemical properties of three layers and particle sizes in the soil profile, soil anti-erodibility of the parent material horizon is the weakest, followed by the illuvial horizon, while eluvial horizon is the strongest. The main factors determining soil anti-erodibility of the three layers are the contents of medium and small particle sizes and bonding capability of particles.