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Estuarine tidal range dynamics under rising sea levels.
PLOS ONE ( IF 2.9 ) Pub Date : 2021-09-20 , DOI: 10.1371/journal.pone.0257538
Danial Khojasteh 1 , Shengyang Chen 1 , Stefan Felder 1 , Valentin Heimhuber 1 , William Glamore 1
Affiliation  

How an estuary responds to sea level rise (SLR) is complex and depends on energy drivers (e.g., tides and river inflows), estuarine geometry (e.g., length and depth), intrinsic fluid properties (e.g., density), and bed/bank roughness. While changes to the tidal range under SLR can impact estuarine sediment transport, water quality, and vegetation communities, studies on the altered tidal range under SLR are often based on case studies with outcomes applicable to a specific site. As such, this study produced a large ensemble of estuarine hydrodynamic models (>1800) to provide a systematic understanding of how tidal range dynamics within different estuary types may change under various SLR and river inflow scenarios. The results indicated that SLR often amplifies the tidal range of different estuary types, except for short estuaries with a low tidal range at the mouth where SLR attenuates the tides. SLR alters the location of the points with minimum tidal range and overall tidal range patterns in an estuary. Variations in tidal range were more evident in converging estuaries, shallower systems, or in estuaries with strong river inflows. These findings provide an indication of how different estuary types may respond to estuaries and may assist estuarine managers and decision makers.

中文翻译:

海平面上升下的河口潮差动态。

河口对海平面上升 (SLR) 的反应非常复杂,取决于能量驱动因素(例如潮汐和河流流入)、河口几何形状(例如长度和深度)、固有流体特性(例如密度)和河床/河岸粗糙度。虽然 SLR 下潮差的变化会影响河口沉积物输送、水质和植被群落,但 SLR 下潮差变化的研究通常基于案例研究,其结果适用于特定地点。因此,本研究产生了一个大型河口水动力模型集合(>1800),以系统地了解不同河口类型内的潮差动态在各种 SLR 和河流流入情景下可能如何变化。结果表明,SLR经常会​​放大不同河口类型的潮差,除了在河口潮差较小的短河口,SLR会减弱潮汐。SLR 改变河口中潮差最小点的位置和总体潮差模式。在交汇的河口、较浅的系统或河流流入量较大的河口,潮差的变化更为明显。这些发现表明不同河口类型如何对河口做出反应,并可能为河口管理者和决策者提供帮助。
更新日期:2021-09-20
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