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首页> 外文期刊>Journal of hydro-environment research >Effects of conjunction channel on water exchange in riverside embayment
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Effects of conjunction channel on water exchange in riverside embayment

机译：汇合河道对河道排涝中水交换的影响

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摘要

A riverside embayment is expected to provide a good habitat for aquatic life. It is often connected with primary river flow through a conjunction channel. It is important to maintain water quality and to prevent siltation in such a dead water zone. In this study, we investigated the effects of the length, location and orientation angle of a conjunction channel on flow structures and water exchange rate. The experiments were conducted in a laboratory flume and velocity vectors were measured by PIV method in horizontal planes. The flow patterns in embayment zones were extremely changed by the angle of the conjunction channel. When the length of conjunction channel is long relatively to the width, an isolated vortex was generated in a conjunction zone. This vortex fluctuates and penetrates intermittently into embayment zone. The water exchange rate was investigated by a dye-injection method. The water exchange rate is generally proportional to the velocity scale in the embayment area but it was affected by vortex structures in a conjunction channel.
机译：预计河边的隔离带将为水生生物提供良好的栖息地。它通常通过汇合通道与主要河流汇流相连。在这样的死水区域中，保持水质并防止淤积很重要。在这项研究中，我们调查了一条连接通道的长度，位置和方向角对流动结构和水交换率的影响。实验在实验室水槽中进行，并通过PIV方法在水平面上测量速度矢量。汇合区的角度极大地改变了排泄区的流动模式。当汇合通道的长度相对于汇合通道的长度较长时，会在汇合区域中产生孤立的涡旋。该涡旋波动并间歇地渗透到嵌入区。通过染料注入法研究水交换速率。换水率通常与集水区的速度成正比，但受汇合通道中旋涡结构的影响。

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