Modeling of the effect of flow depth on sediment discharged by rain‐impacted flows from sheet and interrill erosion areas: a review
Modeling of the effect of flow depth on sediment discharged by rain‐impacted flows from sheet and interrill erosion areas: a review
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DOI：
10.1002/hyp.9363
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发表时间：
2013-08
影响因子：
3.2
通讯作者：
P. Kinnell
中科院分区：
文献类型：
--
作者：
P. Kinnell
受降雨影响的水流从片状和细沟间侵蚀区排放的泥沙、营养物质和污染物可能会影响溪流和河流的水质。土壤表面的水深影响着雨滴撞击对降雨径流下土壤物质的分离能力，一些所谓的基于过程和机理的模型错误地使用了基于水深对飞溅侵蚀影响的公式来解释这种影响。此外，许多这样的模型需要复杂的数学解才能运行，只有在它们的许多参数专门针对它们所应用的情况进行校准的情况下，才能很好地预测沉积物组成和排放。已有文献报道了受雨水影响的水流的实验，其中侵蚀表面上的水流深度和速度已被控制，并提供了更合适的方程来解释影响受雨水影响的水流中颗粒的脱离和输运的液滴尺寸-水流深度相互作用。需要开发依赖于在已知流动深度和速度的受控流动条件下获得的相关数据的建模方法。版权所有©2012 John Wiley&Sons，Ltd.
Sediment, nutrients and pollutants discharged from sheet and interrill erosion areas by rain‐impacted flows may influence water quality in streams and rivers. The depth of water on the soil surface influences the capacity of raindrop impacts to detach soil material underlying rain‐impacted flows, and a number of so‐called process‐based and mechanistic models erroneously use equations on the basis of the effect of water depth on splash erosion to account for this effect. Also, a number of these models require complex mathematical solutions to make them operate and can only predict sediment composition and discharges well if many of their parameters are calibrated specifically to the situations where they are being applied. Experiments with rain‐impacted flows, where flow depth and velocity over eroding surfaces have been controlled, have been reported in the literature and provide more appropriate equations to account for the drop size – flow depth interactions that affect detachment and transport of particles in rain‐impacted flows. There is a need to develop modeling approaches that rely on relevant data obtained under well‐controlled flow conditions where flow depths and velocities are known. Copyright © 2012 John Wiley & Sons, Ltd.