Quantitative relationship between aggregate characteristics of red soil and slope erosion

Yan Fengling; Li Zhaoxia; Shi Zhihua; Cai Chongfa

Volume 25 Issue 3

Mar. 2009

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Abstract

Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2009 > 25(3): 37-41.

Yan Fengling, Li Zhaoxia, Shi Zhihua, Cai Chongfa. Quantitative relationship between aggregate characteristics of red soil and slope erosion[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2009, 25(3): 37-41.

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Quantitative relationship between aggregate characteristics of red soil and slope erosion

1.
Key Laboratory of Subtropical Agriculture and Environment, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China
2.
ChangJiang Water Resources Protection Institute, Wuhan 430051, China

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Received Date: January 01, 2008
Revised Date: February 27, 2009
Published Date: March 30, 2009

Graphical Abstract

Abstract

Abstract

In order to determine the effect of structure characteristic of red soil on slope erosion, the relationship between aggregate characteristic of red soil and slope erosion was preliminary studied based on the analysis of aggregate stability and the simulated rainfall experiment in field. Six typical red soils were chosen for the study. The results showed that the aggregate stability of red soil was the important factor effecting slope erosion in field. The aggregate characteristic parameter Ka which could quantitatively describe soil erodibility showed a significant correlation with the runoff intensity and sediment-yield intensity. By introducing Ka into the WEPP (Water Erosion Production Project) model, the erosion prediction equation was established with a good correlation coefficient (R2 = 0.86). The equation showed a good prediction performance. The study extends the scope of application of the aggregate stability as soil erodibility index, and provides a new way to revel the erosion mechanism of red soil.
- erosion,
- WEPP model,
- red soil,
- aggregate characteristic,
- soil erodibility

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