WFD Transitional and Coastal Water Bodies Cycle 2 Classification 2019

WFD Transitional and Coastal Water Bodies Cycle 2 Classification 2019 is an alternate version of ‘WFD Transitional and Coastal Waterbodies Cycle 2’ with the addition of 2019 classification data and additional user attribution including Catchment Partnership codes. The geometry has been simplified to improve user experience.
These are polygon datasets containing attributes that have been collated as defined for the implementation of the Water Framework Directive (WFD). It comprises both the Transitional and the Coastal water bodies used for the WFD in Cycle 2 Article 2, clause 6 of the WFD defines Transitional water bodies 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’. These are also referred to as estuaries. Transitional water bodies were defined from Mean High Water boundaries, taken directly from OS 1:50K MeridianTM 2 and Environment Agency estuarine boundaries defined for the Urban Waste Water Treatment Directive (UWWTD). Article 2, clause 7 of the WFD defines coastal water bodies as ‘…a surface water on the landward side of a line, every point of which is at a distance of one nautical mile on the seaward side from the nearest point of the baseline from which the breadth of territorial waters is measured, extending where appropriate up to the outer limit of transitional waters’. Coastal waters were defined by territorial waters 1 nautical mile from the Mean High Water coastline taken directly from OS 1:50K MeridianTM 2. The delineation between coastal and estuarine waters was delineated by the Environment Agency defined transitional water bodies. Water bodies are also split and assigned to River Basin Districts.
These Transitional and Coastal water bodies have been simplified for fast display in this version of the dataset, so the higher resolution legal definition of these water bodies remains ‘WFD Transitional and Coastal Waterbodies Cycle 2’. Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved.

WFD 过渡和海岸水体循环2分类2019是‘WFD 过渡和海岸水体循环2’的一个替代版本，其中加入了2019年的分类数据，并增加了包括流域合作伙伴代码在内的额外用户归属信息。为了提升用户体验，该数据集的几何形状已进行简化。这些数据集包含按照《水框架指令》（WFD）实施要求汇总的属性。它既包括过渡水体，也包括用于WFD第二周期第二篇第六条的海岸水体。WFD第二篇第七条规定，过渡水体为‘…河流入海口附近的表面水体，由于其靠近海岸水体而部分呈咸水性质，但受淡水流动的影响较大’。这些水体也被称为河口。过渡水体是由OS 1:50K MeridianTM 2和环境保护署为《城市废水处理指令》（UWWTD）所定义的河口边界确定的平均高潮线所界定。WFD第二篇第七条规定，海岸水体为‘…位于一条线陆侧的表面水体，该线的每一点距离最近的基线 seaward 侧点为一海里，基线是测量领海宽度所依据的，适当延伸至过渡水体的外缘’。海岸水体是由OS 1:50K MeridianTM 2直接确定的平均高潮线领海外侧1海里。海岸水体与河口水体之间的划分由环境保护署定义的过渡水体界定。水体还根据流域分区进行分割和分配。本版本的数据集中，这些过渡和海岸水体为了快速显示而进行了简化，因此这些水体的更高分辨率的法定定义仍为‘WFD 过渡和海岸水体循环2’。归属声明：© 环境保护署版权和/或数据库权利2015。版权所有。