TRANSPORT MODELING IN WATERSHEDS

We show, giving relevant examples, how the modelling of principal phenomena taken into account in the transport models in watersheds is treated. We next present, in diagram form, the main models proposed in the last 15 years, especially in the U.S.A. Two models developed at the Fluid Mechanics Institute in Toulouse help to illustrate the advantages and weaknesses of this type of approach. In the last part, lessons are drawn from this piece of research and we attempt to broaden lines of thought to improve the weak chain in these models, i.e. the simulation of the water cycle.