2D Modelling of turbulant transport of cohesive sediments in shallow reservoirs

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dc.contributor.advisorBasson, G. R.
dc.contributor.authorDe Villiers, J. W. L.en_ZA
dc.contributor.otherUniversity of Stellenbosch. Faculty of Engineering. Dept. of Civil Engineering.
dc.date.accessioned2008-01-29T09:58:40Zen_ZA
dc.date.accessioned2010-06-01T09:02:04Z
dc.date.available2008-01-29T09:58:40Zen_ZA
dc.date.available2010-06-01T09:02:04Z
dc.date.issued2006-12en_ZA
dc.descriptionThesis (MScEng (Civil Engineering))--University of Stellenbosch, 2006.
dc.description.abstractModelling of the transport of fine cohesive sediments, as found in most South African reservoirs, has not been well developed. This is because the transport processes that are involved are complex and the theories not as implicit as the traditional equilibrium transport theories for coarse non-cohesive sediment. Advection and dispersion are found to be the processes that best describe the transport of fine sediments in turbulent flow conditions. A two-dimensional modelling tool, MIKE 21C, which simulates reservoir hydrodynamics and cohesive sediment transport processes with an advection-dispersion model, was evaluated in this thesis. The creation of such a numerical model involves the setting up of a suitable curvilinear grid and requires data on the bathymetry, recorded inflows as well as water levels. It also requires sediment characteristic parameters and transport parameters. These parameters have to be specified by the user based on previous studies and field measurement data. MIKE 21C was applied to laboratory flume tests and reservoir case studies in the field in order to determine the effects that these parameters have on the sediment transport in a series of sensitivity studies. Ranges were determined within which these parameter values should fall. A procedure was also developed through which reservoir sedimentation models can be calibrated.en_ZA
dc.format.extent6677111 bytesen_ZA
dc.format.mimetypeapplication/pdfen_ZA
dc.identifier.urihttp://hdl.handle.net/10019.1/2940
dc.language.isoenen_ZA
dc.publisherStellenbosch : University of Stellenbosch
dc.rights.holderUniversity of Stellenbosch
dc.subjectReservoir sedimentationen_ZA
dc.subjectSediment transporten_ZA
dc.subjectTheses -- Civil engineeringen_ZA
dc.subjectDissertations -- Civil engineeringen_ZA
dc.subject.otherCivil engineeringen_ZA
dc.title2D Modelling of turbulant transport of cohesive sediments in shallow reservoirsen_ZA
dc.typeThesisen_ZA
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