Flood hydrographs in open channels
Flood hydrographs in open channels
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DOI：
10.1680/wama.2004.157.1.45
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发表时间：
2004-03
期刊：
影响因子：
--
通讯作者：
W. Graf;Z. Qu
中科院分区：
文献类型：
--
作者：
W. Graf;Z. Qu
对于明渠水流，流量曲线是将水深读数转换为流量的指标。当流量稳定均匀时，额定曲线具有独特的关系。对于由洪水过程线产生的非恒定流，流量曲线显示特征环，这意味着非唯一关系。在本文中，通过过程线的调查，重点是基本的水力参数，即平均流速，流量和流深，随后对其他重要参数，如摩擦速度和摩擦系数。它们各自峰值的到达顺序是本研究的主题。有限数量的实验室实验，使用一个简单的通道几何形状已被执行，并提出。
For flow in open channels, rating curves are indicators by which readings of the flow depth are converted to discharge. Rating curves have unique relations when the flow is steady and uniform. For unsteady flows, produced by flood hydrographs, rating curves show characteristic loops, implying non-unique relations. In this paper, the passage of hydrographs is investigated, focusing on the basic hydraulic parameters, namely mean velocity, discharge and flow depth, and subsequently on other important parameters, such as friction velocity and friction coefficient. The sequence of arrival of their respective peaks is the subject of this investigation. A limited number of laboratory experiments using a simple channel geometry have been performed and are presented.