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| Titel |
Quasi 2D hydrodynamic modelling of the flooded hinterland due to dyke breaching on the Elbe River |
| VerfasserIn |
S. Huang, S. Vorogushyn, K.-E. Lindenschmidt |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Large-scale hydrological modelling and the European Union water policies ; Nr. 11 (2007-05-16), S.21-29 |
| Datensatznummer |
250009004
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| Publikation (Nr.) |
 copernicus.org/adgeo-11-21-2007.pdf |
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| Zusammenfassung |
| In flood modeling, many 1D and 2D combination and 2D models are used to
simulate diversion of water from rivers through dyke breaches into the
hinterland for extreme flood events. However, these models are too demanding
in data requirements and computational resources which is an important
consideration when uncertainty analysis using Monte Carlo techniques is used
to complement the modeling exercise. The goal of this paper is to show the
development of a quasi-2D modeling approach, which still calculates the
dynamic wave in 1D but the discretisation of the computational units are in
2D, allowing a better spatial representation of the flow in the hinterland
due to dyke breaching without a large additional expenditure on data
pre-processing and computational time. A 2D representation of the flow and
velocity fields is required to model sediment and micro-pollutant transport.
The model DYNHYD (1D hydrodynamics) from the WASP5 modeling package was used
as a basis for the simulations. The model was extended to incorporate the
quasi-2D approach and a Monte-Carlo Analysis was used to conduct a flood
sensitivity analysis to determine the sensitivity of parameters and boundary
conditions to the resulting water flow. An extreme flood event on the Elbe
River, Germany, with a possible dyke breach area was used as a test case.
The results show a good similarity with those obtained from another 1D/2D
modeling study. |
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