The rivers running through Lyon, Rhône and mainly Saône, assumed in former ages a leading part in the urban activities, before they have been separated of the urban net by erection of dams. Their interest and the value of rivers as a label of the city are now recognized in the so called "Blue Plan" of urbanization : dams are designed, gardens and mall are built, river piers managed. Upstream of Lyon, a large semi-wild space will be also protected.Le Rhône et surtout la Saône ont longtemps joué un rôle important dans la vie urbaine de l'agglomération lyonnaise, avant d'être progressivement isolés par la construction des quais. Leur prise en compte dans les nouveaux projets d'urbanisme (Plan Bleu) montre que Lyon recherche à travers l'aménage...