Predicting head cut erosion and migration in concentrated flows typical of upland areas
Predicting head cut erosion and migration in concentrated flows typical of upland areas
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DOI：
10.1029/2001wr001173
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发表时间：
2002-12
影响因子：
5.4
通讯作者：
C. Alonso;S. Bennett;O. Stein
中科院分区：
文献类型：
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作者：
C. Alonso;S. Bennett;O. Stein
切头开发和移民造成的土壤侵蚀可能会破坏农业用地，但目前的预测技术并不能解决这一重要的侵蚀过程。这里提出了这种侵蚀现象的分析模型。对冲刷孔附近的质量、动量和能量传递规律进行现实的、基于物理的近似，得出了针对冲水池侵蚀程度和头切迁移率的封闭式预测算法。该模型引入了对不通风溢流条件的特殊处理，仅限于均匀、无界的土层，并通过可用的实验测量进行了验证。
Soil erosion due to head cut development and migration can devastate agricultural lands, yet current prediction technology does not address this important erosion process. Here an analytical model of this erosional phenomenon is presented. Realistic, physically based approximations to the laws governing mass, momentum, and energy transfer in the neighborhood of the scour hole result in closed‐form predictive algorithms for the magnitude of the plunge pool erosion and the rate of head cut migration. The model introduces a special treatment of nonventilated overfall conditions, is limited to homogeneous, unbounded soil layers, and is validated by available experimental measurements.