Simulation of sediment transport during flood events: laboratory work and field experiments
Simulation of sediment transport during flood events: laboratory work and field experiments
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DOI：
10.1080/02626660109492853
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发表时间：
2001-08
影响因子：
3.5
通讯作者：
Renaat De Sutter;R. Verhoeven;A. Krein
中科院分区：
文献类型：
--
作者：
Renaat De Sutter;R. Verhoeven;A. Krein
本文旨在对非恒定流中河流泥沙悬移质输移问题有一个基本的认识。实验室冲刷试验以及人工洪水试验用于评估瞬变状态对水流输送效率的影响。冲刷试验表明，水流非定常性增大，输沙能力增大。然而，河床的粘性特性抵消了瞬时状态的影响。人工洪水从水库释放到一个小运河的现场实验证实了这些发现，并显示摩擦速度和悬移质运输之间的关系。提出了一个合适的参数β来评价瞬变过程对悬沙输移的影响。
Abstract This paper aims at initiating a fundamental understanding of the suspended load transport of river sediment in unsteady flow. Laboratory erosion tests as well as artificial flood experiments are used to evaluate the influence of the transient regime on the transport efficiency of the flow. The erosion experiments reveal that the transport capacity is augmented when the unsteadiness of the flow increases. However, the influence of the transient regime is counteracted by the cohesive properties of the river bed. Field experiments with artificial floods released from a reservoir into a small canal confirm these findings and show a relationship between the friction velocity and the suspended load transport. An appropriate parameter β is proposed to evaluate the impact of the transient regime on the transport of suspended sediment.