Résumé
In the environmental field, water management provides examples of the move towards participative democracy. Indeed, French water policy promotes participative river basin management devices. Such devices allow confrontation of several relationship with water and raise the issue of composing these diversity within decision making process. How to compose diverse cultural viewpoints, water uses objectives and people attachment to environment? We have designed a setting of experimental sociology to allow a group of people to experience this difficulty in composing with a variety of viewpoints. It takes the form of simulation game, Concert'eau, in which players have to embody principles of justification and face events in shared virtual river basin. First experiments have shown that the same patterns due to this pluralism emerge from the gaming session as from real situations of dialogue