A novel approach for the assessment of morphological evolution based on observed water levels in tide-dominated estuaries
A novel approach for the assessment of morphological evolution based on observed water levels in tide-dominated estuaries
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基于潮汐控制河口观测水位的形态演化评估新方法
DOI：
10.5194/hess-2019-661
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发表时间：
2020-01
影响因子：
6.3
通讯作者：
Yang Qingshu
中科院分区：
文献类型：
--
作者：
Cai Huayang;Zhang Ping;Garel Erwan;Matte Pascal;Hu Shuai;Liu Feng;Yang Qingshu
抽象。评估自然（如来自海洋的潮汐力）和人为变化（如疏浚航行和土地复垦）对河口形态的影响对于河口环境的保护和管理尤为重要。在这项研究中，提出了一种新的分析方法来评估河口形态演变的潮汐平均深度的基础上观测到的水位沿着河口。其关键在于推导出波的振幅与潮汐衰减或放大之间的关系。对于给定的两个观测站的观测水位，可以首先估计波浪的波矢（距离除以潮汐传播时间）和潮汐阻尼或放大率（潮差除以距离），然后可以通过潮汐水动力学的逆分析模型来预测形态变化。以珠江口伶仃洋为例，分析了该湾的潮汐动力和形态演变的历史发展过程。分析结果表明，令人惊讶的良好的对应关系，在这个系统中观察到的水深和体积。所提出的方法的优点是，它提供了一个简单的方法，通过使用观测水位，这通常是可用的，可以很容易地测量了解河口形态的年代际演变。
Abstract. Assessing the impacts of both natural (e.g. tidal forcing from the ocean) and human-induced changes (e.g. dredging for navigation and land reclamation) on estuarine morphology is particularly important for the protection and management of the estuarine environment. In this study, a novel analytical approach is proposed for the assessment of estuarine morphological evolution in terms of tidally averaged depth on the basis of the observed water levels along the estuary. The key lies in deriving a relationship between wave celerity and tidal damping or amplification. For given observed water levels at two gauging stations, it is possible to have a first estimation of both wave celerity (distance divided by tidal travelling time) and tidal damping or amplification rate (tidal range difference divided by distance), which can then be used to predict the morphological changes via an inverse analytical model for tidal hydrodynamics. The proposed method is applied to the Lingdingyang Bay of the Pearl River Estuary, located on the southern coast of China, to analyse the historical development of the tidal hydrodynamics and morphological evolution. The analytical results show surprisingly good correspondence with observed water depth and volume in this system. The merit of the proposed method is that it provides a simple approach for understanding the decadal evolution of the estuarine morphology through the use of observed water levels, which are usually available and can be easily measured.
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影响因子：
3.9
作者：
Brunier, Guillaume;Anthony, Edward J.;Dussouillez, Philippe
通讯作者：
Dussouillez, Philippe
影响因子：
3.9
作者：
Ziyin Wu;J. Milliman;Zhao Dineng;Zhou Jieqiong;Cai Yao
通讯作者：
Ziyin Wu;J. Milliman;Zhao Dineng;Zhou Jieqiong;Cai Yao
影响因子：
5.4
作者：
J. Gisen;H. Savenije
通讯作者：
J. Gisen;H. Savenije
河流流量和潮汐不对称对一维河口形态动力学的作用
影响因子：
3.9
作者：
Guo, L.;van der Wegen, M.;He, Q.
通讯作者：
He, Q.
影响因子：
18.3
作者：
Syvitski, James P. M.;Kettner, Albert J.;Nicholls, Robert J.
通讯作者：
Nicholls, Robert J.