| Further Information | Map No.1: River basin surveys - regional water authority & local authority boundaries (1:250,000); Map No.2: Upper Trent basin survey - hydrometry, land drainage, amenity & recreation (1:100,000); Map No.3: Upper Trent basin survey - water resources and water supplies (1:100,000); Map No.4: Upper Trent basin survey - water quality and water reclamation (1:100,000). |