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Modeling changes in rill erodibility and critical shear stress on native surface roads

机译:模拟自然路面上的钻蚀性和临界剪切应力变化

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摘要

This study investigated the effect of cumulative overland flow on rill erodibility and critical shear stress on native surface roads in central Idaho. Rill erodibility decreased exponentially with increasing cumulative overland flow depth; however, critical shear stress did not change. The study demonstrated that road erodibility on the studied road changes over the course of one or more consecutive overland flow events. Therefore, model simulations that fail to take into consideration this change will probably over-estimate sediment yields. An exponential function describing the relationship between rill erodibility and cumulative overland flow depth is presented as a basis for future model development for simulating erosion on native surface roads.
机译:这项研究调查了爱达荷州中部天然地面道路上累积的陆上径流对小溪侵蚀性和临界剪切应力的影响。随着累积陆上水深的增加,河道的侵蚀性呈指数下降。但是,临界剪应力没有变化。该研究表明,所研究道路上的道路易蚀性在一个或多个连续的陆上水流事件过程中发生了变化。因此,如果模型模拟没有考虑到这一变化,可能会高估沉积物的产量。提出了描述钻头可蚀性与累积陆上水流深度之间关系的指数函数,作为未来模型开发的基础,以模拟天然地面道路上的侵蚀。

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