Set 100 years in the future, Aquonica emerges within the flooded landscape of Leyton Marsh, where rising water levels have displaced canal boat dwellers from the bankside environments they once occupied. Drawing from the principles explored in Andrea Branzi's Agronica, the project reimagines habitation, production, and civic life within a permanently altered floodplain. Rather than resisting inundation, Aquonica works with it. Floodwater is collected, filtered, and recirculated through the building, supporting hydroponic food production while making environmental processes visible and productive. Space is organised through gradients of exposure, shelter, and interaction with water. Open communal spaces frame expansive views across the marshlands, preserving access to openness and horizon within an increasingly dense London. Replacing the social role of the lost bankside landscape, Aquonica provides a new civic anchor for life on the water. The project rethinks the politics of comfort and protection, proposing architecture not as a barrier to environmental change, but as infrastructure embedded within it.