坡面流侵蚀量与水动力学参数具有特殊关系,为建立侵蚀量与坡面流流速、剪切力和断面单位能量间的定量关系,通过室内人工降雨坡面流模型试验,针对不同坡比、不同降雨强度条件进行了坡面流流速、产沙率等要素的系统试验测量。利用参数分析法,通过标准差、变异系数和决定系数之间的对比评价,优选出与侵蚀输沙相关程度较高的动力学参数。结果表明:坡面流剪切力线性关系式用于描述坡面流输沙的变化过程具有较好的模拟效果。
A special relationship exists between overland flow erosion and kinetic parameter. In order to set up the quantitative relationship, kinetic mechanism of slope erosion process,slope velocity and sand transport rate and other elements were measured for different slopes than and different rainfall intensity conditions through the overland flow model experiments of artificial rainfall. In view of the contrast between the standard deviation,coefficient of variation and the coefficient of determination,the kinetic parameters of sand transport and erosion of high correlation were selected. Experiments results show that linear rate equation of shear stress has good simulation results describing the change process of gully erosion sediment transport.