WFD Transitional (Estuarine) Waterbodies’ is a spatialdataset containing attributes that have been collated as defined for the implementation of the Water Framework Directive (WFD). Article 2, clause 6 of the WFD defines them as ‘…bodies of surface water in the vicinity of river mouths which are partly saline in character as a result of their proximity to coastal waters but are substantially influenced by freshwater flows’. Transitional waterbodies were defined from Mean High Water boundaries, taken directly from OS 1:50K MeridianTM 2, and estuarine boundaries defined for the Urban Waste Water Treatment Directive (UWWTD). Attribution Statement Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right.