In 2026, Les Ateliers de Cergy will continue the cycle of Seine workshops, a collective reflection on the future of the basin, in a context of dwindling water resources, heightened hydrological risks, and the need for new forms of territorial governance around water.

Following the Seine Amont and the workshop “The River Seine as a Great Garden: The Sources”, Les Ateliers will explore the metropolitan territory of the Seine basin and its specificities.

How can we inhabit the Seine and its tributaries tomorrow in the dense city, facing amplified risks of flooding and drought?

What forms of solidarity and governance can sustain urban life that gives full place to the living world and the water cycle?

How can we anticipate conflicts of use related to water?

Fifteen young professionals and students from around the world will work in teams for 20 days in September 2026, engaging in a collective and creative process to put forward proposals and boldly sketch the contours of a Great Séquanien Garden.