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| Titel |
Sediment transport modelling in a distributed physically based hydrological catchment model |
| VerfasserIn |
M. Konz, M. Chiari, S. Rimkus, J. M. Turowski, P. Molnar, D. Rickenmann, P. Burlando |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 9 ; Nr. 15, no. 9 (2011-09-09), S.2821-2837 |
| Datensatznummer |
250012956
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| Publikation (Nr.) |
 copernicus.org/hess-15-2821-2011.pdf |
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| Zusammenfassung |
| Bedload sediment transport and erosion processes in channels are important
components of water induced natural hazards in alpine environments. A raster
based distributed hydrological model, TOPKAPI, has been further developed to
support continuous simulations of river bed erosion and deposition
processes. The hydrological model simulates all relevant components of the
water cycle and non-linear reservoir methods are applied for water fluxes in
the soil, on the ground surface and in the channel. The sediment transport
simulations are performed on a sub-grid level, which allows for a better
discretization of the channel geometry, whereas water fluxes are calculated
on the grid level in order to be CPU efficient. Several transport equations
as well as the effects of an armour layer on the transport threshold
discharge are considered. Flow resistance due to macro roughness is also
considered. The advantage of this approach is the integrated simulation of
the entire basin runoff response combined with hillslope-channel coupled
erosion and transport simulation. The comparison with the modelling tool
SETRAC demonstrates the reliability of the modelling concept. The devised
technique is very fast and of comparable accuracy to the more specialised
sediment transport model SETRAC. |
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