Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/4025
Title: | Near-shore sediment dynamics computation under the combined effects of waves and currents | Authors: | Carmo, J. S. Antunes do Seabra-Santos, F. J. |
Keywords: | Deep-water; Shallow-water; Wave-current interaction; Extended Boussinesq equations; Sediment-transport model | Issue Date: | 2002 | Citation: | Advances in Engineering Software. 33:1 (2002) 37-48 | Abstract: | An integrated computational structure for non-cohesive sediment-transport and bed-level changes in near-shore regions has been developed. It is basically composed of: (1) three hydrodynamic sub-models; (2) a dynamic equation for the sediment transport (of the Bailard-type); and (3) an extended sediment balance equation. A shallow-water approximation, or Saint-Venant-type model, is utilized for the computation and up-to-date field currents, initially and after each characteristic computational period. A Berkhoff-type wave model allows us to determine the wave characteristics in deep water and intermediate water conditions. These computations make it possible to define a smaller modeling area for a non-linear wave-current model of the Boussinesq-type, including breaking waves, friction effects and improved dispersion wave characteristics. Bed topography is updated after each wave period, or a multiple of this, called computational sedimentary period. Applicability of the computational structure is confirmed through laboratory experiments. Practical results of a real-world application obtained around the S. Lourenço fortification, Tagus estuary (Portugal), with the intention of preventing the destruction of the Bugio lighthouse, are shown. | URI: | https://hdl.handle.net/10316/4025 | DOI: | 10.1016/S0965-9978(01)00045-X | Rights: | openAccess |
Appears in Collections: | FCTUC Eng.Civil - Artigos em Revistas Internacionais |
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file33e7443bdb4b41ac96f051acbc969f33.pdf | 4.16 MB | Adobe PDF | View/Open |
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