DO WE NEED PRE-STORM SURVEYED BATHYMETRY FOR OPERATIONAL EROSION FORECASTING? EVALUATION OF REPRESENTATIVE AND SYNTHETIC BATHYMETRY ALTERNATIVES

Nashwan Matheen; Mitchell D. Harley; Ian L.Turner; Joshua A. Simmons; Mandi Thran

doi:10.9753/icce.v36v.sediment.13

No. 36v (2020), Sediment Transport and Morphology

No. 36v (2020)

DO WE NEED PRE-STORM SURVEYED BATHYMETRY FOR OPERATIONAL EROSION FORECASTING? EVALUATION OF REPRESENTATIVE AND SYNTHETIC BATHYMETRY ALTERNATIVES

Sediment Transport and Morphology

Published 2020-12-28

Nashwan Matheen
Mitchell D. Harley
Ian L.Turner
Joshua A. Simmons
Mandi Thran

Nashwan Matheen

Mitchell D. Harley

Ian L.Turner

Joshua A. Simmons

Mandi Thran

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DO WE NEED PRE-STORM SURVEYED BATHYMETRY FOR OPERATIONAL EROSION FORECASTING? EVALUATION OF REPRESENTATIVE AND SYNTHETIC BATHYMETRY ALTERNATIVES. (2020). Coastal Engineering Proceedings, 36v, sediment.13. https://doi.org/10.9753/icce.v36v.sediment.13

Abstract

Immediate pre-storm bathymetry is a key input required for numerical models used in coastal hazard Early Warning Systems. However, the expense and challenging nature of hydrographic surveying means that the availability of high-quality data is extremely rare. This study evaluates the extent to which synthetic and representative bathymetry alternatives can be used to obtain reliable predictions of storm induced sub-aerial erosion using the XBeach coastal erosion numerical model. Multiple storm events at 2 contrasting sites are modelled using 6 bathymetry scenarios including pre-storm surveyed bathymetries, an average bathymetry, and Dean profiles. The output is analysed to evaluate the skill of XBeach erosion predictions as a function of the bathymetry used.

Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/bE3aXVXxZqQ

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DO WE NEED PRE-STORM SURVEYED BATHYMETRY FOR OPERATIONAL EROSION FORECASTING? EVALUATION OF REPRESENTATIVE AND SYNTHETIC BATHYMETRY ALTERNATIVES

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