Water Framework Directive (WFD) Transitional Waterbodies Cycle 2

'Water Framework Directive (WFD) Transitional Waterbodies' is a polygon Shapefile dataset 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 NRW estuarine boundaries defined for the Urban Waste Water Treatment Directive (UWWTD). Since waterbodies are attributed with a unique identifier 'EA_WB_ID' this dataset can be linked dire
ctly to other WFD data sources such as physical characteristics, risk, classification and proposed objectives. These data apply to Cycle 2 of the Water Framework Directive.

《水框架指令（WFD）过渡性水域》是一项包含特定属性的聚合数据集，这些属性按照《水框架指令（WFD）》的实施要求进行整理。根据《水框架指令（WFD）》第二条第六款的规定，这些属性被定义为‘…位于河口附近的水面水体，由于靠近沿海水域而部分具有咸水特性，但主要受淡水流的影响’。过渡性水域的定义基于平均高潮线边界，该边界直接取自OS 1:50K MeridianTM 2，以及为《城市污水污泥处理指令（UWWTD）》所设定的NRW河口边界。鉴于水体被赋予了一个唯一的标识符‘EA_WB_ID’，此数据集可以直接与其他《水框架指令（WFD）》数据源相连接，如物理特性、风险、分类和拟定的目标。这些数据适用于《水框架指令（WFD）》的第二周期。