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Bolla Pittaluga, M., & Seminara, G. (2002). Modelling suspended sediment transport in tidal flows: Theory and application to long term equilibrium of tidal channels. Scientific Research and Safeguarding of Venice, Corila Research Program 2001 Results, I, 679–692.
Added by: Dott. Alessandro Meggiato (28/05/2014 16:19:23)
|Tipo di Risorsa: Articolo di Rivista
Chiave di citazione BibTeX: BollaPittaluga2002
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Keywords: extend abstract corila, idraulica, idrodinamica, modello matematico, morfologia, processi ambientali - Environmental Processes
Creatori: Bolla Pittaluga, Seminara
Collezione: Scientific Research and Safeguarding of Venice, Corila Research Program 2001 Results
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We derive a depth averaged model of suspended sediment transport.
The development of the analysis leads us to revisit the asymptotic approach originally developed by Galappatti (1983), more recently generalised by Wang (1992) and widely employed in commercial codes. The formal asymptotic expansion of the exact solution is found to differ from Galappatti's approach. Moreover, rather than leading to a differential equation for the depth averaged concentration it actually provides higher order corrections for the leading order equilibrium approximation of the depth averaged concentration. Such corrections can be expressed in terms of spatial and temporal derivatives of the leading order solution. Based on the formal asymptotic expansion of the exact solution, we are then able to derive an analytical form for the flux of suspended sediment appropriate in slowly varying flows, which is suitable to applications to a variety of morphodynamic contexts including tidal and fluvial environments. Such approach is then applied to investigate the long term equilibrium of tidal channels.
Added by: Dott. Alessandro Meggiato