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| Titel |
3-D numerical approach to simulate the overtopping volume caused by an impulse wave comparable to avalanche impact in a reservoir |
| VerfasserIn |
R. Gabl, J. Seibl, B. Gems, M. Aufleger |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 15, no. 12 ; Nr. 15, no. 12 (2015-12-09), S.2617-2630 |
| Datensatznummer |
250119818
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| Publikation (Nr.) |
 copernicus.org/nhess-15-2617-2015.pdf |
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| Zusammenfassung |
The impact of an avalanche in a reservoir induces impulse waves,
which pose a threat to population and infrastructure. For a good
approximation of the generated wave height and length as well as the
resulting overtopping volume over structures and dams, formulas, which are
based
on different simplifying assumptions, can be used. Further project-specific
investigations by means of a scale model test or numerical simulations are
advisable for complex reservoirs as well as the inclusion of hydraulic
structures such as spillways.
This paper presents a new approach for a 3-D numerical simulation of the
avalanche impact in a reservoir. In this model concept the energy and mass
of the avalanche are represented by accelerated water on the actual hill
slope. Instead of snow, only water and air are used to simulate the moving
avalanche with the software FLOW-3D. A significant advantage of this
assumption is the self-adaptation of the model avalanche onto the terrain. In
order to reach good comparability of the results with existing research at
ETH Zürich, a simplified reservoir geometry is investigated. Thus, a
reference case has been analysed including a variation of three geometry
parameters (still water depth in the reservoir, freeboard of the dam and
reservoir width). There was a good agreement of the overtopping volume at the
dam between the presented 3-D numerical approach and the literature
equations. Nevertheless, an extended parameter variation as well as a
comparison with natural data should be considered as further research topics. |
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