The EU Water Framework Directive (2000/60/EC) (WFD) establishes a framework for the protection, improvement and management of surface waters and groundwaters. A new WFD lake catchment layer was created in 2022. New lake catchments were delineated for every WFD lake from the outflow up to very farthest source, i.e. the whole catchment. If multiple lakes exist along the same river system, their catchments overlap.