The University of Southampton
University of Southampton Institutional Repository

Simplified two-dimensional numerical modelling of coastal flooding and example applications

Simplified two-dimensional numerical modelling of coastal flooding and example applications
Simplified two-dimensional numerical modelling of coastal flooding and example applications
In this paper we outline the development and application of a simple two-dimensional hydraulic model for use in assessments of coastal flood risk. Such probabilistic assessments typically need evaluation of many thousands of model simulations and hence computationally efficient codes of the type described here are required. The code, LISFLOOD-FP, uses a storage cell approach discretized as a regular grid and calculates the flux between cells explicitly using analytical relationships derived from uniform flow theory. The resulting saving in computational cost allows fine spatial resolution simulations of regional scale flooding problems within minutes or a few hours on a standard desktop PC. The development of the code for coastal applications is described, followed by an evaluation of its performance against four test cases representing a variety of flooding problems at different scales. For three of these cases an observed flood extent is available to compare to model predictions. In each case the model is able to match the observed shoreline to within the error of the of the observed flow, topography and validation data and outperforms a non-model flood extent prediction made using a simple Geographical Information System (GIS) technique.
coastal flooding, 2D numerical modelling, inundation, defence overtopping, sea level rise
0378-3839
793-810
Bates, Paul D.
253914fc-226e-4904-9fa3-ac464a1756c2
Dawson, Richard J.
a90610f1-4380-4a4f-9259-b258dcf778cb
Hall, Jim W.
6084cd9f-ef4b-451c-8756-f0e8c14b26b5
Horritt, Matthew S.
2824a884-b6d0-43f1-ac24-8e019c3d9329
Nicholls, Robert J.
4ce1e355-cc5d-4702-8124-820932c57076
Wicks, Jon
91c52a67-b741-49c6-a87b-b0b5d2ce1b7e
Hassan, Mohamed Ahmed Ali Mohamed
7c69cd9f-3370-4695-a5ff-456368aa75e4
Bates, Paul D.
253914fc-226e-4904-9fa3-ac464a1756c2
Dawson, Richard J.
a90610f1-4380-4a4f-9259-b258dcf778cb
Hall, Jim W.
6084cd9f-ef4b-451c-8756-f0e8c14b26b5
Horritt, Matthew S.
2824a884-b6d0-43f1-ac24-8e019c3d9329
Nicholls, Robert J.
4ce1e355-cc5d-4702-8124-820932c57076
Wicks, Jon
91c52a67-b741-49c6-a87b-b0b5d2ce1b7e
Hassan, Mohamed Ahmed Ali Mohamed
7c69cd9f-3370-4695-a5ff-456368aa75e4

Bates, Paul D., Dawson, Richard J., Hall, Jim W., Horritt, Matthew S., Nicholls, Robert J., Wicks, Jon and Hassan, Mohamed Ahmed Ali Mohamed (2005) Simplified two-dimensional numerical modelling of coastal flooding and example applications. Coastal Engineering, 52 (9), 793-810. (doi:10.1016/j.coastaleng.2005.06.001).

Record type: Article

Abstract

In this paper we outline the development and application of a simple two-dimensional hydraulic model for use in assessments of coastal flood risk. Such probabilistic assessments typically need evaluation of many thousands of model simulations and hence computationally efficient codes of the type described here are required. The code, LISFLOOD-FP, uses a storage cell approach discretized as a regular grid and calculates the flux between cells explicitly using analytical relationships derived from uniform flow theory. The resulting saving in computational cost allows fine spatial resolution simulations of regional scale flooding problems within minutes or a few hours on a standard desktop PC. The development of the code for coastal applications is described, followed by an evaluation of its performance against four test cases representing a variety of flooding problems at different scales. For three of these cases an observed flood extent is available to compare to model predictions. In each case the model is able to match the observed shoreline to within the error of the of the observed flow, topography and validation data and outperforms a non-model flood extent prediction made using a simple Geographical Information System (GIS) technique.

Full text not available from this repository.

More information

Published date: September 2005
Keywords: coastal flooding, 2D numerical modelling, inundation, defence overtopping, sea level rise

Identifiers

Local EPrints ID: 53514
URI: https://eprints.soton.ac.uk/id/eprint/53514
ISSN: 0378-3839
PURE UUID: 0977c91f-6ec5-4452-95f3-abe2a7d6aa06
ORCID for Robert J. Nicholls: ORCID iD orcid.org/0000-0002-9715-1109

Catalogue record

Date deposited: 22 Jul 2008
Last modified: 14 Mar 2019 01:43

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×