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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : 1D Unsteady Flow and Sediment Transport Model for Vegetated Channel Network
1D Unsteady Flow and Sediment Transport Model for Vegetated Channel Network
Author : Yang Bai and Jennifer G. Duan
This paper presents a one-dimensional model for simulating flood routing and sediment transport over mobile alluvium in a vegetated channel network. The modified St. Venant equation together with the governing equations for suspended sediment and bed load transport are solved simultaneously to obtain flow field and sediment transport rate. The Godunov-type finite volume method is employed, and the flux terms are discretized by using the upwind scheme. Then, the Exner equation is solved for bed elevation changes. The non-equilibrium sediment transport algorithm is used to simulate sediment transport. The influence of vegetation on floodplain and main channel is accountedfor by adjusting the resistance term in the momentum equations and shear stress in computing sediment transport capacity. The model is tested by an unprecedented flood event occurred in the Santa Cruz River, Tucson, Arizona, in July 2006.Simulated results of flow discharge and bed elevation changes show satisfactory agreements with the measurements.
File Size : 264,870 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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