Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/27906
Title: A 2D parallel diffusive wave model for floodplain inundation with variable time step (P-DWave)
Authors: Leandro, J.
Chen, A. S.
Schumann, A.
Keywords: Parallelization
Diffusive wave model
Wet–Dry fronts
Variable time step
Absolute mass conservation
Issue Date: 19-Sep-2014
Publisher: Elsevier
Citation: LEANDRO, J.; CHEN, A. S.; SCHUMANN, A. - A 2D parallel diffusive wave model for floodplain inundation with variable time step (P-DWave). "Journal of Hydrology". ISSN 0022-1694. Vol. 517 (2014) p. 250–259
Abstract: Growing advances in remote sensing technologies together with the widespread availability of Digital terrain models (DTM) have intensified the research into two-dimensional (2D) models. Supported by detailed DTM, 2D models can become very accurate tools yet not without an added cost on the computational effort. Floodplain inundation is characterised by a slow varying phenomenon which can last hours, days or even weeks. In this paper we aim to develop a specific parallel diffusive wave model with variable time step suitable for flood inundation. Taking advantage of up to 12 processors, speed-up times ranging from 1.7 to 5.2 and 1.2 to 1.7 are achieved with the Matlab parallel computing toolbox and Fortran OpenMP Application Programming, respectively. The variable time method and the process devised to represent Wet–Dry fronts kept the solution stable and preserved absolute mass conservation. P-DWave performed well against known analytical solutions and dynamic and diffusive models in a total of seven tests.
Peer review: Yes
URI: http://hdl.handle.net/10316/27906
DOI: 10.1016/j.jhydrol.2014.05.020
ISSN: 0022-1694
Publisher Version: http://www.sciencedirect.com/science/article/pii/S0022169414003849
Appears in Collections:I&D MARE - Artigos em Revistas Internacionais
FCTUC Eng.Civil - Artigos em Revistas Internacionais

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