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You are here : eLibrary : IAHR World Congress Proceedings : 32nd Congress - Venice (2007) : THEME A: Engineering and Management of Fresh-water Systems : Linear approximation of open-channel flow routing with backwater effect
Linear approximation of open-channel flow routing with backwater effect
Author : Simon Munier, Xavier Litrico, Gilles Belaud
This paper proposes a new model for linear flow routing in open-channels. The proposed model, called LBLR for Linear Backwater Lag and Route, is a rst order with delay model that explicitly takes into account two parameters which are usually neglected:1) the downstream boundary condition and 2) the nonuniform flow conditions, both of which are shown to have a strong influence on the flow dynamics. The model parameters are obtained analytically from the pool characteristics (geometry, friction, discharge and downstream boundary condition). A frequency domain approach is used to compute the frequency response of the linearized Saint-Venant equations. This model is then approximated by a rst order plus delay model using the moment matching method. The proposed model is shown to perform better than existing models when the flow is a ffected by backwater and/or by diff erent downstream boundary conditions from the one corresponding to uniform flow.
File Size : 198,540 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 32nd Congress - Venice (2007)
Article : THEME A: Engineering and Management of Fresh-water Systems
Date Published : 01/07/2007
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