The Rhone river plume in unsteady conditions: Numerical and experimental results

Surface current maps obtained in the plume of the Rhome river by two VHF ra dars gave rise to comparisons with simulations produced by a primitive-equa tion model. Two situations were investigated: one in steady conditions, the other with a variable wind. The model gives a good estimation of current d irection and velocity not only in the plume itself but also in the surround ing water. The model reveals the mechanisms involved in the plume dilution and more generally in the renewal of surface water near the coast when the wind changes direction. The sensitivity of the model results to the upper b oundary condition for turbulent kinetic energy is also shown. (C) 2001 Acad emic Press.