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- W3100711900 abstract "The solution of an extended Riemann problem is used to provide the internal boundary conditions at a junction when simulating one-dimensional flow through an open channel network. The proposed approach, compared to classic junction models, does not require the tuning of semi-empirical coefficients and it is theoretically well-founded. The Riemann problem approach is validated using experimental data, two-dimensional model results and analytical solutions. In particular, a set of experimental data is used to test each model under subcritical steady flow conditions, and different channel junctions are considered, with both continuous and discontinuous bottom elevation. Moreover, the numerical results are compared with analytical solutions in a star network to test unsteady conditions. Satisfactory results are obtained for all the simulations, and particularly for Y-shaped networks and for cases involving variations in channels' bottom and width. By contrast, classic models suffer when geometrical channel effects are involved." @default.
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- W3100711900 date "2018-12-13" @default.
- W3100711900 modified "2023-09-24" @default.
- W3100711900 title "Numerical modelling of open channel junctions using the Riemann problem approach" @default.
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- W3100711900 doi "https://doi.org/10.1080/00221686.2018.1534283" @default.
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