Bedload transport in shallow water models: Why splitting (may) fail, how hyperbolicity (can) help. Cordier, S., Le, M., & Morales de Luna, T. Advances in Water Resources, 34(8):980–989, August, 2011. ![Bedload transport in shallow water models: Why splitting (may) fail, how hyperbolicity (can) help [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex In this paper, we are concerned with sediment transport models consisting of a shallow water system coupled with the so called Exner equation to describe the evolution of the topography. We show that, for some bedload transport models like the well-known Meyer-Peter and M�ller model, the system is hyperbolic and, thus, linearly stable, only under some constraint on the velocity. In practical situations, this condition is hopefully fulfilled. Numerical approximations of such system are often based on a splitting method, solving first shallow water equation on a time step and, updating afterwards the topography. It is shown that this strategy can create spurious/unphysical oscillations which are related to the study of hyperbolicity. Using an upper bound of the largest eigenvector may improve the results although the instabilities cannot be always avoided, e.g. in supercritical regions.
@Article{cordier2011bedload,
Title = {Bedload transport in shallow water models: Why splitting (may) fail, how hyperbolicity (can) help},
Author = {Cordier, S. and Le, {M.H.} and Morales de Luna, T.},
Journal = {Advances in Water Resources},
Year = {2011},
Month = aug,
Number = {8},
Pages = {980--989},
Volume = {34},
Abstract = {In this paper, we are concerned with sediment transport models consisting of a shallow water system coupled with the so called Exner equation to describe the evolution of the topography. We show that, for some bedload transport models like the well-known {Meyer-Peter} and M�ller model, the system is hyperbolic and, thus, linearly stable, only under some constraint on the velocity. In practical situations, this condition is hopefully fulfilled. Numerical approximations of such system are often based on a splitting method, solving first shallow water equation on a time step and, updating afterwards the topography. It is shown that this strategy can create spurious/unphysical oscillations which are related to the study of hyperbolicity. Using an upper bound of the largest eigenvector may improve the results although the instabilities cannot be always avoided, e.g. in supercritical regions.},
Category = {WATER RESOURCES},
Comment = {�ndice de impacto: 2.477, Revista dentro del 25%: S�, Num. revistas en cat.: 76, Categor�a: WATER RESOURCES , Posici�n: 4, Fuente de impacto: WOS (JCR)},
Doi = {16/j.advwatres.2011.05.002},
File = {:cordier2011Bedload.pdf:PDF},
Impactfactor = {2.477 (2010)},
ISSN = {0309-1708},
Keywords = {Exner equation, Hyperbolicity, Sediment transport, Shallow water system, Splitting methods, Stability},
Position = {4},
Revincat = {76},
Shorttitle = {Bedload transport in shallow water models},
Url = {http://www.sciencedirect.com/science/article/pii/S0309170811000935}
}
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