Comparative Analysis of HLLC- and Roe-Based Models for the Simulation of a Dam-Break Flow in an Erodible Channel with a 90∘ Bend

In geophysical surface flows, the sediment particles can be transported under capacity (equilibrium) conditions or noncapacity (nonequilibrium) conditions. On one hand, equilibrium approach for bedload transport assumes that actual rate instantaneously adapts to local flow features. The resulting system of equations, composed shallow water equations (SWE) and Exner equation bed evolution, has been widely used simulate processes. These SWE + models are highly dependent on setup parameters, so calibration procedure often disguises advantages flaws numerical method. other approaches account temporal spatial delay with respect flow. importance assuming nonequilibrium in remains uncertain however. this work, we compared performances three different strategies resolution approximate a set experimental data fixed parameters. results indicate discrete strategy compute intercell fluxes significantly affected solution. Furthermore, improve model prediction regions complex transient processes, but it requires careful