RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (01): 63-70.doi: 10.11870/cjlyzyyhj201601008

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RESEARCH ON DIFFERENT SOIL LAYERS OF COLLAPSING GULLY FRACTAL CHARACTERISTICS AND EROSION CHARACTERISTICS IN TONGCHENG

DENG Yu-song1, LI Shuang-xi2, DING Shu-wen1, CAI Chong-fa1, XIA Dong1, LIU Dan-lu1   

  1. 1. Research Center of Water and Soil Conservation, Huazhong Agricultural University, Wuhan 430070, China;
    2. Changjiang Soil Conservation Monitoring Centre, CWRC, Wuhan 430010, China
  • Received:2015-05-06 Revised:2015-07-22 Online:2016-01-20

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Abstract: Collapsing gully is an extremely serious soil erosion type in the southeast of Hubei Province, which has a wide range of influence and destruction. Therefore, it is important to study the mechanism of the collapsing gully and erosion mechanism for improving the ecological environment of agricultural areas. We chose the granite in Tongcheng County, Southeastern Hubei collapsing at different levels to study soil, mainly toanalyze collapsing gully profile fractal dimension of soil particle, erodibility, permeability and water stability, and through regression analysis and other methods to establish the relationship between soil properties. Results showed that:the soil of collapsing gully in Tongcheng County in Southeastern Hubei topsoil layer, clay layer and markings layer and debris layer properties are quite different, soil particle fractal dimension D from surface soil to detritus layer showed a decreasing trend, soil erodibility K values from surface soil to detritus layer showed an increasing trend, water stable index showed a decreasing trend, permeability is laterite layer and the surface soil layer and debris layer of rules. At the same time, the correlation analysis and multivariate linear regression analysis showed that profiles of slope disintegration of soil particle fractal dimension, can be erosion resistance, permeability and water stability between closely related, the correlation between anti erodibility and soil properties significantly. The purpose of this study is to clarify the internal factors of the occurrence of collapsing gully, and to provide a basis for the occurrence mechanism of the collapsing gully.

Key words: Collapsing Gully, fractal dimension, erodibility, permeability, water stability

CLC Number: 

  • S157.1
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