1.1 Design basis of simulation experiment

Most rivers are tractive flow, which is a typical Newtonian fluid. Although there are a large number of gravity flow event deposits in the fan system, in order to simplify the experiment, it is also regarded as the result of common river sedimentation for simulation in this study. based on the similar hydrodynamic characteristics of the river, WIETSE·I et al. (2013) successfully reproduced the sedimentary evolution process of this kind of river, and better presented the geometric shape and evolution of the river.