Retention pools on Rennes Métropole

This layer represents the retention ponds intended to regulate the flow of rainwater during major rain events. It contains information on the owner of these basins (domaniality), the management of the associated green spaces and the ecological interest of the basin (from a study carried out in 2017 – attribute not updated).
Eventually, it will also contain information on the storage volumes and leakage rates of these basins.