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Towards a hydrodynamic modelling framework appropriate for applications in urban flood assessment and mitigation using heterogeneous computing

Lookup NU author(s): Dr Luke Smith, Professor Qiuhua Liang, Dr Paul Quinn

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Abstract

We present a new hydrodynamic modelling framework capable of fully exploiting modern graphics and central processing units (GPUs and CPUs) from any of the mainstream vendors, to be used in the design and assessment of sustainable drainage systems. A finite-volume Godunov-type scheme is combined with the HLLC Riemann solver to create a robust numerical model which correctly addresses wetting and drying and transient flow conditions, and is suitable for application to a wide range of flood simulations. The software is tested with a three day flood event in Carlisle during 2005, at resolutions from 25m to 2m. Run-times are significantly reduced without compromising numerical accuracy. Excellent agreement is found between the simulation results and a comprehensive post-event survey. Changes in sensitivity to Manning's n are examined at different resolutions, with changes to the floodplain found to have little influence at 2m resolution.

Publication metadata

Author(s): Smith LS, Liang QH, Quinn PF

Publication type: Article

Publication status: Published

Journal: Urban Water Journal

Year: 2015

Volume: 12

Issue: 1

Pages: 67-78

Print publication date: 31/07/2014

Acceptance date: 19/06/2014

ISSN (print): 1573-062X

ISSN (electronic): 1744-9006

Publisher: Taylor & Francis

URL: http://dx.doi.org/10.1080/1573062X.2014.938763

DOI: 10.1080/1573062X.2014.938763

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