Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 11, issue 3
Articles | Volume 11, issue 3
https://doi.org/10.5194/esurf-11-343-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-11-343-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 11, issue 3
Research article
 | 
04 May 2023
Research article |  | 04 May 2023

Water level fluctuations drive bank instability in a hypertidal estuary

Andrea Gasparotto, Stephen E. Darby, Julian Leyland, and Paul A. Carling

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Short summary
In this study the processes leading to bank failures in the hypertidal Severn Estuary are studied employing numerical models and field observations. Results highlight that the periodic fluctuations in water levels drive an imbalance in the resisting (hydrostatic pressure) versus driving (pore water pressure) forces causing a frequent oscillation of bank stability between stable (at high tide) and unstable states (at low tide) both on semidiurnal bases and in the spring–neap transition.
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