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Lateral Distribution of Unit Discharge in a Compound Channel with Vegetation on the Floodplain

Author(s): Sung-Uk Choi; Hyeongsik Kang; Jaekook Shin

Linked Author(s): Sung-Uk Choi

Keywords: Open-channel flow; Compound channel; Floodplain vegetation; Non-linear k-ε model; Eddyviscosity

Abstract: This paper presents a calibration of the 1d model for distributing the unit discharge in a compound channel with floodplain vegetation. The 1d model, including the normalized eddy viscosity related with turbulent shear, is based on the momentum equation in the lateral direction. The RANS model is employed to calibrate the normalized eddy viscosity. The RANS equations in the curvilinear coordinates are solved with the non-linear k-ε model. The models are applied to the Severn River in UK. The unit discharges distributed in the compound channel section are obtained and the total discharge is estimated. The eddy viscosity profile obtained by the RANS model is provided and discussions are given.


Year: 2010

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