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首页> 外文期刊>Estuarine Coastal and Shelf Science >Hydrodynamic modelling of tidal-fluvial flows in a large river estuary
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Hydrodynamic modelling of tidal-fluvial flows in a large river estuary

机译：大型河口潮汐流的水动力模拟

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摘要

The transition between riverine and estuarine environments is characterised by a change from unidirectional to bidirectional flows, in a region referred to herein as the Tidally-Influenced Fluvial Zone (TIFZ). In order to improve our understanding of the hydrodynamics and morphodynamics of this zone, we present a combined field and numerical modelling study of the Columbia River Estuary (CRE), USA, tidally-influenced fluvial zone. The CRE is large measuring 40 km in length and between 5 and 10 km wide. A shallow water model (Delft3D) was applied in both 2D and 3D configurations and model sensitivity to the key process parameterizations was investigated. Our results indicate that a 2D model constrained within the estuary can sufficiently reproduce depth-averaged flow within the TIFZ of a stratified estuary.
机译：河流和河口环境之间的过渡特征是在这里称为潮汐影响河床带（TIFZ）的区域中，从单向流向双向流变化。为了增进我们对该区域水动力和形态动力的理解，我们对潮汐影响的河流带美国哥伦比亚河口（CRE）进行了联合的现场和数值模拟研究。 CRE长40公里，宽5至10公里。在2D和3D配置中均应用了浅水模型（Delft3D），并研究了模型对关键工艺参数设置的敏感性。我们的结果表明，限制在河口内的2D模型可以充分再现分层河口TIFZ内的平均深度流量。

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