Under extreme flow conditions, the riverbed is subject to significant morphological changes. While the simulation tools designed for pure hydrodynamic flows are nowadays quite reliable, there are still significant uncertainties when it comes to the prediction or erosion and deposition patterns. Different mathematical models exist, without any clear agreement in the scientific community about the best adapted approach, and many questions remain open as regards the closure equations for these models.
In our group, we have developed several finite-volume numerical simulation tools based on one- or two-layer models, both in one and two spatial dimensions.