Scale dependency of dune erosion models : performance assessment of the DUROS and XBeach model for various experiment scales

Brandenburg, Peter G.F. (2010) Scale dependency of dune erosion models : performance assessment of the DUROS and XBeach model for various experiment scales.

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Abstract:This report represents a study to the scalability of the dune erosion models. Dune erosion models are used for the safety assessment of the sandy dunes of the Dutch coast. Presently, the safety assessment is based on the relatively simple cross-shore dune erosion model DUROS. The empirical DUROS-model is designed for alongshore uniform coastlines. Since the DUROS-model is not qualified to assess storm impact in complex cases, a more generic model that includes the long-shore dimension can be a helpful instrument. In this study the DUROS-model is compared with the generic model XBeach. The XBeach-model contains a physical description of the most important processes that are of relevance to dune erosion in both cross-shore and long-shore direction. As the dunes are assessed to normative conditions that have never occurred, most models are based on laboratory experiments. Since DUROS and XBeach are based on the samelab experiments but predict different storm impact on real scale (DUROS estimates 40% more dune erosion), the lab-prototype conversion in the two models is different.
Item Type:Essay (Master)
Clients:
Deltares
Faculty:ET: Engineering Technology
Subject:56 civil engineering
Programme:Civil Engineering and Management MSc (60026)
Link to this item:http://purl.utwente.nl/essays/59743
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