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- W4310258510 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> The local inertial two-dimensional (2D) flow model on LISFLOOD-FP, so-called ACC uniform grid solver, has been widely used to support fast, computationally efficient fluvial/pluvial flood simulations. This paper describes new releases, on LISFLOOD-FP 8.1, for parallelised flood simulations on the graphical processing units (GPU) to boost efficiency of the existing parallelised ACC solver on the central processing units (CPU) and enhance it further by enabling a new non-uniform grid version. The non-uniform solver generates its grid using the multiresolution analysis (MRA) of the multiwavelets (MWs) to a Galerkin projection of the digital elevation model (DEM). This sensibly coarsens the resolutions where the local topographic details are below an error threshold ε and allows to properly adapt classes of land use. Both the grid generator and the adapted ACC solver on the non-uniform grid are implemented in a GPU new codebase, using the indexing of Z-order curves alongside a parallel tree traversal approach. The efficiency performance of the GPU parallelised uniform and non-uniform grid solvers are assessed for five case studies, where the accuracy of the latter is explored for ε = 10<sup>-4</sup> and 10<sup>-3</sup> in terms of how close it can reproduce the prediction of the former." @default.
- W4310258510 created "2022-11-30" @default.
- W4310258510 creator A5017122511 @default.
- W4310258510 date "2022-11-29" @default.
- W4310258510 modified "2023-09-25" @default.
- W4310258510 title "Comment on gmd-2022-259" @default.
- W4310258510 doi "https://doi.org/10.5194/gmd-2022-259-rc2" @default.
- W4310258510 hasPublicationYear "2022" @default.
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