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iDEA: Drexel E-repository and Archives > Drexel Academic Community > College of Engineering > Department of Civil, Architectural,and Environmental Engineering > Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405] > Numerical modeling of morphological development in tidal basins using unsteady criteria for the initiation of motion

Please use this identifier to cite or link to this item: http://hdl.handle.net/1860/1446

Title: Numerical modeling of morphological development in tidal basins using unsteady criteria for the initiation of motion
Authors: Kolahdoozan, Morteza
Imanian, Hanifeh
Falconer, Roger A.
Keywords: Coastal morphodynamics;Coastal sediment transport;Tidal currents;Coastal hydrodynamics;Fluvial hydraulics
Issue Date: 13-Sep-2006
Publisher: Michael Piasecki and College of Engineering, Drexel University
Citation: Proceedings of the Seventh International Conference on Hydroscience and Engineering, Philadelphia, PA, September 2006. http://hdl.handle.net/1860/732
Abstract: Details are given herein of the refinement and application of a two-dimensional depth integrated numerical model to predict geo-morphological changes in tidal basins. An Alternating Direction Implicit finite difference algorithm has been used for solving the governing differential equations, which consist of the conservation of mass and momentum for the hydrodynamics, the transport equation for suspended sediment fluxes and the sediment mass conservation equation for bed level changes. The model includes several criteria for the initiation of motion (i.e. Shields (1936), Kolahdoozan (1999) and Zanke (2003)). As the flow is highly turbulent, and its components have a random nature, many researchers have tried to express the sediment transport processes by using stochastic approaches. In the current study, both deterministic and stochastic methods were included in the numerical model to show their accuracy and efficiency. To evaluate the numerical model results laboratory measurements were used, obtained from an earlier experimental programme. In these evaluations long term bed level changes in a laboratory model harbour were used for verification of the model. Comparisons were made using different criteria for the initiation of motion, with the results highlighting that the unsteadiness in the flow parameters included in the numerical models had a major effect on the bed level changes in comparison with the turbulence structure of the flow.
Description: Paper presented at The Seventh International Conference on HydroScience and Engineering (ICHE) hosted by the College of Engineering at Drexel Univeristy on September 10-13, 2006 in Philadelphia, Pennsylvania. The conference theme was IT in the Field of HydroSciences. It included several mini-symposia that emphasized IT topics in HydroSciences and the yearly meeting of the metadata group of the International Oceanographic Data and Information Exchange organization.
URI: http://hdl.handle.net/1860/1446
ISBN: 0977447405
Appears in Collections:Proceedings of the 7th International Conference on HydroScience and Engineering (ICHE 2006) [ISBN: 0977447405]

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