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- W2064306564 abstract "A high-resolution (HR) numerical model for solving 1D shallow water equations employing Voellmy flow resistance relation is developed to predict the time-dependent behavior of non-Newtonian debris flow dynamics in non-erodible channel. The governing equations are solved by the HR shock-capturing method employing the HLLC approximate Riemann solver and the TVD limiter. Based on the fractional-step approach, source terms are treated by an implicit method which makes the model well balanced even when the friction force dominates the flow. A CFL criterion accounting for the total friction velocity is employed to ensure numerically stable solutions. The comparison of numerical results with analytical solutions and experimental measurements shows that the present HR numerical modeling yields accurate solution near discontinuities beyond the first-order-accurate Godunov-type method that is widely used for modeling debris flows. The evaluation tests reveal that the present method yields numerically stable and efficient solutions of debris flows moving downslope with significant basal friction. The application to two debris flows that were experimentally generated with a fixed-volume and a continuous source reveals that the numerical model reproduces the propagation speed of debris flow on the slopes and the deposition pattern on the fan with reasonable accuracy. Overall results indicate that the present model can provide useful information on transient features of debris flow behavior through the channel with an abrupt change in bottom slope." @default.
- W2064306564 created "2016-06-24" @default.
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- W2064306564 date "2015-03-01" @default.
- W2064306564 modified "2023-09-27" @default.
- W2064306564 title "A high resolution finite volume model for 1D debris flow" @default.
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- W2064306564 doi "https://doi.org/10.1016/j.jher.2014.03.001" @default.
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