【摘 要】
：
In order to lay an important foundation of establishing a dynamic process based model of rill flow and sediment,the variation charactersfics of sediment tra
【机 构】
：
State Key Laboratory of Soil Erosion and Dryland Farming in the Loess Plateau,Institute of Soil and
【出 处】
：
The 6th International Symposium on Larger Asian River(第六届亚洲大
论文部分内容阅读
In order to lay an important foundation of establishing a dynamic process based model of rill flow and sediment,the variation charactersfics of sediment transport capacity by rill flow were analyzed,the coupling relationships between the sediment transport capacity and hydrodynamic parameters were investigated,and the effects of sediment transport and detachment by rill flow were clarified.From the study of the variation characteristics of sediment transport capacity by rill flow,factorial models were constructed for the relation of the sediment transport capacity to slope degree and flow discharge.At different slope degrees and flow discharges,the sediment transport capacity increased with slope degree and flow discharge,which can be well described using a power function.The factorial model for the relation was found to be a binary power function: Tc=206.864S0.904q1.281.As shown by the model,flow discharge has a greater contribution to the sediment transport capacity than slope degree.At different flow discharges and slope degrees,the sediment transport capacity increased with rill flow velocity,shear stress,unit stream power,stream power and unit energy.
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