Computing efficiency of XBeach hydro- and wave dynamics on Graphics Processing Units (GPUs)

Rautenbach, Christo; Trenham, Claire; Benn, David W.; Hoeke, Ron; Bosserelle, Cyprien

doi:10.1016/j.envsoft.2022.105532

Cited by 6 publications

(1 citation statement)

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“…The study considers storms as a 12-h duration event with constant characteristics, helping to reduce computational time while focusing on the peak of the storm, which corresponds to the point of highest impact (Mendoza and Jimeńez, 2008;Mendoza et al, 2011). Since the increase of simulation velocity is a crucial factor, we use the Message Passing Interface (MPI) module from XBeach, which allows one to parallelize the code and simulate with simultaneous processors, which is four in our case (Clarke et al, 1994;Rautenbach et al, 2022). This strategy helps to speed up the process, resulting on an average computational time of 1 h per case, while if serial computing was used, the average time could go up to 5-6 h per case.…”

Section: Modelingmentioning

confidence: 99%

Present and future flooding and erosion along the NW Spanish Mediterranean Coast

et al. 2023

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Coastal flooding and eros-ion caused by extreme events are the main factors responsible for beach hazards. This effect will be exacerbated by the sea level rise induced by climate change. The present work determines the vulnerability to erosion and flooding along 55 beaches grouped in different coastal archetypes, representative of the Catalan coast. The vulnerability assessment has been done through the numerical simulation of different combinations for projected waves and mean water levels under present conditions and the climate change scenarios RCP4.5 and RCP8.5 for the year 2100. A storm event approach has been used to determine coastal flooding and erosion with return periods of 50, 100, and 500 years using the XBeach numerical model. Results show that shoreline retreat is not the best proxy to characterize the erosion. The low-lying nature of the coast, the non-presence of well-developed berms, and the existence of river mouth and torrents govern the coastal flooding. The sea level rise appears to be a dominant variable in coastal hazards.

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Section: Modelingmentioning

confidence: 99%