文献类型： 外文期刊

作者： Zhang, C. ¹ ; Jiang, J. ¹ ; Ma, J. ¹ ; Zhang, X. ² ; Yang, Q. ³ ; Ouyang, Q. ¹ ; Lei, X. ¹ ;

作者机构： 1.Taiyuan Univ Technol, Coll Water Resources Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China

2.Shanxi Acad Agr Sci, Sorghum Res Inst, Jinzhong 030601, Shanxi, Peoples R China

3.Changjiang River Sci Res Inst, Wuhan 430010, Hubei, Peoples R China

关键词： Soil erosion;soil reinforcement;artificial neural networks;root area ratio;root tensile strength;soil shear strength

期刊名称：SOIL USE AND MANAGEMENT （ 影响因子：2.95； 五年影响因子：3.109 ）

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收录情况： SCI

摘要： Soil reinforcement by plant roots and its response to influencing factors are very important for bank stability evaluation and control. Models with improved accuracy are urgently needed for evaluating soil reinforcement. Using a back-propagation (BP) learning algorithm, an artificial neural network (ANN) model with five input variables, including the number of roots, root area ratio, root tensile strength, soil shear strength, and soil moisture content, was developed to simulate the response of soil reinforcement to these factors. A connection weight approach was used to understand the relative importance of each factor. Using a data set published in 2003 and collected in Australia, soil reinforcement of four trees, Casuarina glauca, Eucalyptus amplifolia, Eucalyptus elata and Acacia floribunda, was simulated using three models: BP-ANN, one described by Wu et al. in 1979 and the 2005 fibre bundle model (FBM) of Pollen and Simon. Comparisons of results from these models showed that the BP-ANN model most accurately estimated the soil reinforcement. The simulated results indicated that only the effect of soil moisture content on soil reinforcement was negative. The influence of the other four factors was positive, and the relative importance was in the order: root area ratio > root tensile strength > the number of roots > soil shear strength. This study provides a new approach to soil reinforcement estimation and improves our understanding of soil resistance and bank stability.