Coastal Structures and Solutions to Coastal Disasters Joint Conference 2015
Improving the Representation of the Fragility of Coastal Structures
Publication: Coastal Structures and Solutions to Coastal Disasters 2015: Resilient Coastal Communities
Abstract
Information regarding the likelihood of structural failure of flood defences forms an essential part of any flood risk analysis (FRA). At present, when conducting FRA the probability of a defence failing is expressed conditionally upon a single variable either a hydraulic loading or a composite variable—a function of several hydraulic loading variables. A methodology has recently been proposed for simulating realistic sets of extreme nearshore sea conditions that comprises all of the hydraulic loading variables that can combine to produce an extreme sea state. By acting as the boundary conditions for a coastal FRA, the methodology has opened up the possibility of incorporating more detailed representations of the susceptibility of a coastal defence structure to failure into such analyses. It is anticipated that this more accurate description of a structure’s likelihood of failure will ultimately lead to more accurate flood risk estimates. In this paper, the newly derived fragility representations are introduced before the difference/improvement in their description of a defence’s susceptibility to failure is assessed by comparing the annual failure probabilities given by the new and existing representations.
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Acknowledgments
The authors are indebted to the CCO for their freely available wave buoy and lidar data, the ECMWF for the ERA-Interim data and the BODC for providing information on the water level. The authors would also like to thank the SWAN group at Delft University of Technology for providing the freely available wave propagation model and the Engineering and Physical Sciences Research Council (EPSRC) for their contribution to the funding of the project.
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Information & Authors
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Published In
Coastal Structures and Solutions to Coastal Disasters 2015: Resilient Coastal Communities
Pages: 518 - 528
Editors: Louise Wallendorf, U.S. Naval Academy and Daniel T. Cox, Ph.D., Oregon State University
ISBN (Online): 978-0-7844-8030-4
Copyright
© 2017 American Society of Civil Engineers.
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Published online: Jul 11, 2017
Published in print: Jul 11, 2017
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