Hammeken, AM;
Simons, RR;
(2017)
Numerical study on the influence of infiltration on swash hydrodynamics and sediment transport in the swash zone.
In: Lynett, PJ, (ed.)
Proceedings of 35th Conference on Coastal Engineering, Antalya, Turkey, 2016.
ICCE Proceedings, Coastal Engineering Research Council: Antalya, Turkey.
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Abstract
Infiltration and exfiltration processes have a significant influence on the hydrodynamics of the swash zone. Such processes need to be taken into account in the modelling of cross-shore sediment transport and the prediction of beach profile evolution. This paper presents a numerical study of the swash hydrodynamics using a 2D Volume-Averaged Reynolds-Averaged Navier-Stokes model, which was calibrated and validated against new experimental data. The model was used to simulate wave run-up from regular waves over permeable and impermeable fixed slopes. Swash flow velocities and water depth data were obtained from the simulations and used to estimate bed shear stresses at three different locations on the beach slope. The results show that infiltration can have opposing effects on the bed shear stress when compared to equivalent swash on an impermeable slope. During the uprush phase, stresses are directly increased due to boundary layer thinning, whereas, during the backwash phase, there is a significant reduction of flow leading to a decrease in the bed shear stresses.
| Type: | Proceedings paper |
|---|---|
| Title: | Numerical study on the influence of infiltration on swash hydrodynamics and sediment transport in the swash zone |
| Event: | 35th International Conference on Coastal Engineering |
| Location: | Antalya, Turkey |
| Dates: | 17 November 2016 - 20 November 2016 |
| ISBN-13: | 978-0-9896611-3-3 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://journals.tdl.org/icce/index.php/icce/artic... |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | swash, infiltration, sediment transport, hydraulic conductivity, bed shear stress |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1557337 |
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