The long-term goal of this work is to develop numerical simulation techniques for predicting waveinduced sediment transport and bed evolution in the coastal zone (order 10 meter depth outside the surf zone), at horizontal scales of tens of meters or less, and the scouring/burial around objects/obstacles (mine-like), partially buried in the bottom. This research was initially motivated by the Na...

Reach-scale widening of channelized rivers can locally reactivate morphodynamic processes and increase habitat heterogeneity. Following process-based restoration principles, construction efforts are often limited to bank protection removal local erosion initiation. Despite significant advances in our understanding fluvial processes, the influence sediment supply on morphodynamics is still inade...

A depth-averaged (2DH) exploratory model is developed to identify morphodynamic equilibria in short mesotidal inlet systems with arbitrary planform geometries. The water motion forced by an M 2 tidal constituent at the seaward entrance and described shallow equations, whereas depth-integrated suspended sediment concentration follows from a diffusion equation, taking into account local inertia, ...

We show how to introduce the Value at Risk (VaR) concept in the analysis of the adaptation of the shape of a soft bed to a flow knowing the Probability Density Function (PDF) of the responses of the shape to flow perturbations (bed receptivity). Our aim is to quantify our confidence on simulation scenarios by an available morphodynamic model for the shape. The approach permits to perform this t...

Cytoskeletal mechanics regulates cell morphodynamics and many physiological processes. While contractility is known to be largely RhoA-dependent, the process by which localized biochemical signals are translated into cell-level responses is poorly understood. Here we combine optogenetic control of RhoA, live-cell imaging and traction force microscopy to investigate the dynamics of actomyosin-ba...