强潮河口径潮流动力平衡特点研究

以瓯江河口为例,通过建立河口段物理模型进行了水流试验。通过试验资料及天然实测资料的优势流计算,研究了河口区域径流量和潮流量的比值与其动力平衡特征的关系。结果显示,动力平衡点的位置与径流量和潮流量的比值关系密切,径流量与潮流量的比值越大,滞流点越向下游,反之则滞流点越往上游摆动。而河口水下地势变化与动力平衡区域的关系也说明了动力平衡区域可以促使泥沙的聚集,这与拦门沙的形成关系密切。通过强潮河口优势流的计算,可以较清晰地分析该河口段主要动力的强弱,有利于自然现象的分析。

Study on dynamic balance characteristics of runoff and tidal current for macro-tidal estuary

Oujiang Estuary was taken as an example in this paper to study the relationship between the ratio of the runoff and the tidal current and its dynamic balance characteristics,where a physical model of the estuary was constructed to simulate the current movement.The dominant current of the estuary which was calculated according to the various situation of the runoff and tidal current from the physical model and actual observation records,was used to analyze the dynamic balance characteristics of runoff and ti...