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- W148924522 abstract "Flood disasters are a major cause of fatalities and economic losses, and several studies indicate that global flood risk is currently increasing. In order to reduce and mitigate the impact of river flood disasters, the current trend is to integrate existing structural defences with non structural measures. This calls for a wider application of advanced hydraulic models for flood hazard and risk mapping, engineering design, and flood forecasting systems.Within this framework, two different hydraulic models for large scale analysis of flood events have been developed. The two models, named CA2D and IFD-GGA, adopt an integrated approach based on the diffusive shallow water equations and a simplified finite volume scheme. The models are also designed for massive code parallelization, which has a key importance in reducing run times in large scale and high-detail applications.The two models were first applied to several numerical cases, to test the reliability and accuracy of different model versions. Then, the most effective versions were applied to different real flood events and flood scenarios. The IFD-GGA model showed serious problems that prevented further applications. On the contrary, the CA2D model proved to be fast and robust, and able to reproduce 1D and 2D flow processes in terms of water depth and velocity. In most applications the accuracy of model results was good and adequate to large scale analysis. Where complex flow processes occurred local errors were observed, due to the model approximations. However, they did not compromise the correct representation of overall flow processes.In conclusion, the CA model can be a valuable tool for the simulation of a wide range of flood event types, including lowland and flash flood events." @default.
- W148924522 created "2016-06-24" @default.
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- W148924522 date "2012-05-11" @default.
- W148924522 modified "2023-09-27" @default.
- W148924522 title "Development of parallelizable flood inundation models for large scale analysis" @default.
- W148924522 doi "https://doi.org/10.6092/unibo/amsdottorato/4635" @default.
- W148924522 hasPublicationYear "2012" @default.
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