caa a22 4500 605546568 CHVBK 20210128100941.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s10236-015-0844-8 doi (NATIONALLICENCE)springer-10.1007/s10236-015-0844-8 Sensitivity of tidal motion in well-mixed estuaries to cross-sectional shape, deepening, and sea level rise [Elektronische Daten] An analytical study [Erik Ensing, Huib de Swart, Henk Schuttelaars] For well-mixed estuaries, key physical mechanisms are identified and quantified that cause changes in characteristics of the semi-diurnal sea surface elevation and lateral velocity due to modifications of the lateral bottom profile, channel deepening, and sea level rise. This is done by decomposing solutions of a new analytical model into components relating to different physical processes. The default geometry and parameter values are representative for the Ems estuary, with a converging width and a reflective landward boundary. The default Gaussian lateral bottom profile is modified to obtain profiles with the same cross-sectional area, but with a different skewness or steepness. Results show that a steeper lateral bottom profile leads to amplification of the sea surface elevation. The width convergence is shown to influence the resonance characteristics. Channel deepening and sea level rise result in amplification of the sea surface elevation until a resonance peak is reached. When flooding is incorporated, the amount of sea level rise at which maximum tidal amplification occurs is found to be about two times lower. When using a symmetric Gaussian bottom profile, the lateral tidal flow is determined by Coriolis deflection of longitudinal flow and lateral density gradients caused by differential salt advection. However, an additional lateral tidal flow component incorporating the effect of continuity related to sea level variations and longitudinal gradients in longitudinal flow is shown to become increasingly important for skewed lateral bottom profiles. Furthermore, the lateral flow due to the lateral density gradient is enhanced for bottom profiles with increased steepness. The Author(s), 2015 Idealised model nationallicence Shallow water equations nationallicence Tidal flow nationallicence Ems estuary nationallicence Resonance nationallicence Ensing Erik Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Princetonplein 5, 3584 CC, Utrecht, The Netherlands aut de Swart Huib Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Princetonplein 5, 3584 CC, Utrecht, The Netherlands aut Schuttelaars Henk Delft Institute of Applied Mathematics, Delft University of Technology, Mekelweg 4, 2628 CD, Delft, The Netherlands aut Ocean Dynamics Springer Berlin Heidelberg 65/7(2015-07-01), 933-950 1616-7341 65:7<933 2015 65 10236 https://doi.org/10.1007/s10236-015-0844-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10236-015-0844-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ensing Erik Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Princetonplein 5, 3584 CC, Utrecht, The Netherlands aut NATIONALLICENCE 700 1- de Swart Huib Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Princetonplein 5, 3584 CC, Utrecht, The Netherlands aut NATIONALLICENCE 700 1- Schuttelaars Henk Delft Institute of Applied Mathematics, Delft University of Technology, Mekelweg 4, 2628 CD, Delft, The Netherlands aut NATIONALLICENCE 773 0- Ocean Dynamics Springer Berlin Heidelberg 65/7(2015-07-01), 933-950 1616-7341 65:7<933 2015 65 10236