Effects of Tidal-Forcing Variations on Tidal Properties Along a Narrow Convergent Estuary |
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| Authors: | Erwan Garel Huayang Cai |
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| Affiliation: | 1.Centre for Marine and Environmental Research (CIMA),University of Algarve,Faro,Portugal;2.Institute of Estuarine and Coastal Research, School of Marine Sciences,Sun Yat-sen University,Guangzhou,China;3.Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering,Guangzhou,China |
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| Abstract: | A 1D analytical framework is implemented in a narrow convergent estuary that is 78 km in length (the Guadiana, Southern Iberia) to evaluate the tidal dynamics along the channel, including the effects of neap-spring amplitude variations at the mouth. The close match between the observations (damping from the mouth to ～ 30 km, shoaling upstream) and outputs from semi-closed channel solutions indicates that the M2 tide is reflected at the estuary head. The model is used to determine the contribution of reflection to the dynamics of the propagating wave. This contribution is mainly confined to the upper one third of the estuary. The relatively constant mean wave height along the channel (
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