Effects of the irregularity in the cross sectional distribution of velocity on the 1D shallow-water model

ABSTRACT: In this work, a decomposition of the channel cross section in subsections is performed to improve the 1D shallow-water simulation of unsteady open channel flows in cases of distorted cross sectional shapes. Some test cases with measured data are used to validate the quality of the approaches and a natural river is used to illustrate the effects due to the cross sections irregularity.