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A modified hyperbolic tangent equation to determine equilibrium shape of headland bay beaches

Kemp, J; Vandeputte, B; Eccleshall, T; Simons, R; Troch, P; (2018) A modified hyperbolic tangent equation to determine equilibrium shape of headland bay beaches. In: Proceedings of the 36th International Conference on Coastal Engineering, ICCE 2018. ISCE: Baltimore, Maryland. (In press). Green open access

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Abstract

When designing any artificial beach, it’s desirable to avoid (or minimise) future maintenance commitments by arranging the initial beach planshape so that it remains in equilibrium given the incident wave climate. Headlands bays, or embayments, where a sandy beach is held between two erosion resistant headlands, tend to evolve to a stable beach planshape with little movement of the beach contours over time. Several empirical bay shape equations have been derived to fit curves to the shoreline of headland bay beaches. One of the most widely adopted empirical equations is the parabolic bay shape equation, as it is the only equation that directly links the shoreline positions to the predominant wave direction and the point of diffraction. However, the main limitation with the application of the parabolic bay shape equation is locating the downcoast control point. As a result of research presented in this paper a new equation, based on the hyperbolic tangent shape equation was developed, which eliminates the requirement of placing the down coast control point and relies on defining a minimum beach width instead. This modified equation was incorporated into a new ArcGIS tool.

Type: Proceedings paper
Title: A modified hyperbolic tangent equation to determine equilibrium shape of headland bay beaches
Event: 36th International Conference on Coastal Engineering, ICCE 2018
Open access status: An open access version is available from UCL Discovery
DOI: 10.9753/icce.v36.papers.106
Publisher version: https://doi.org/10.9753/icce.v36.papers.106
Language: English
Additional information: Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.
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/10086045
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