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Nearshore dynamics

机译：近岸动力学

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Estuaries are often modified by human activities. Adjustments in the morphology of an estuary have a potential impact on the hydrodynamics and on the reflection behavior of the tide. The influence of such system changes on the complex tidal regime with a large number of superimposed tidal constituents is not fully understood yet. The reflection properties of estuaries that are characterized by abrupt changes in geometry are systematically investigated on the basis of simplified estuary model approaches to improve the understanding of the oscillation and reflection behavior of tidal waves in estuaries. The reflection coefficients at abrupt cross-sectional changes are determined by two different methods, i.e., an analytical energy-based approach and a hydro-dynamic numerical (HN) model. Comparisons indicate a high agreement of the results of the different methods when evaluating the reflection coefficient. The tidal constituents are reflected at partial and total reflectors and amplified by shoaling depending on the water depths, the height of the bottom step and the horizontal constriction. A harmonic analysis of simulated water level data partly shows the formation and amplification of higher harmonic components as a result of shallow water effects. The interaction with reflectors results in an increasing amplification of the tidal constituents and the tide.
机译：河口往往是由人类活动改变。在河口的形态调整对流体力学和上潮的反射行为的潜在影响。对复杂的潮汐规律等系统的变化具有大量叠加的分潮的影响尚未完全了解。河口为特征的几何形状的突然变化的反射特性被系统地研究的简化模型河口的基础上办法，提高在河口潮波的振荡和反射行为的理解。在突然的横截面变化的反射系数是由两种不同的方法，即，分析基于能量的方法和水力动力数值（HN）模型来确定。比较指示的不同方法的结果的一个一致性高评估的反射系数时。潮汐组分在部分和全部反射器反射，并通过取决于水深不冻的放大，底部台阶的高度和水平收缩。模拟水位数据的谐波分析部分地示出了形成与高次谐波分量的放大作为浅水效应的结果。装有反光体的相互作用导致分潮和浪潮的日益扩增。

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    《Oceanographic Literature Review》 |2021年第4期|713-717|共5页
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