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Experimental Study on Local Scour in the Downstream Area of Low Drop Structure Types

机译:低落结构类型下游区局部冲刷试验研究

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摘要

Although ecologically disadvantageous since a river is interrupted because of drop structure installation, such structure installation is also deemed ecologically advantageous in terms of scour and complex flows in the direct downstream area. This study started from the premise that scour hole carries value as a habitat and sought to analyze quantitatively the local scour adjustment possibility in the downstream area through drop structure type change and to offer a habitat through scouring. This study provided changes in drop structure types, such as straight line type and V type. For local scour analysis impacting the downstream area by drop structure type, quantitative analysis of scour scope, depth, and length was comparatively performed for a tentative physical habitat through hydraulic experiments. As a result of the experiments, this study found that scour scope increases and various water depth conditions are offered as the angle of the drop structure’s apex becomes smaller. Future studies accompanied by various fish habitation evaluations are considered useful in finding an alternative to upgrade the ecological environment.
机译:尽管由于落水结构的安装而使河流中断而在生态上不利,但就直接下游区域的冲刷和复杂流量而言,这种结构的安装在生态上也被认为是有利的。本研究从冲孔作为栖息地具有价值这一前提出发,力图通过滴状结构类型变化定量分析下游地区局部冲刷调整的可能性,并通过冲刷提供栖息地。这项研究提供了液滴结构类型的变化,例如直线型和V型。为了通过滴水结构类型影响下游区域的局部冲刷分析,通过水力实验对暂定物理栖息地的冲刷范围,深度和长度进行了定量分析。作为实验的结果,该研究发现,随着水滴结构顶点的角度变小,冲刷范围会增加,并且会提供各种水深条件。未来的研究以及各种鱼类栖息地评估被认为有助于寻找替代方案来改善生态环境。

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