WFD River Waterbody Catchments Cycle 2

The WFD River Waterbody Catchments Cycle 2 are a polygon dataset collated as defined for the implementation of the Water Framework Directive. Catchments are defined as an area of land from which all surface run-off flows through a series of streams, rivers and, possibly, lakes to a particular point in the water course such as a river confluence. Since rivers are attributed with a unique identifier 'WB_ID' this dataset can be linked directly to the WFD river waterbody to which it relates. This data also contains areas of land which drain directly to the coastal or estuarine waters, rather than through a river water body. These have A 'WB_ID' as a number, a WB_Cat of 'Coastal Catchment' and all are named 'Not part of a river WB catchment' Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved.WFD河流水体集水区第二周期数据集是为落实水框架指令（Water Framework Directive, WFD）的实施要求而整理的多边形数据集。集水区的定义为：所有地表径流经一系列溪流、河流，或经湖泊（若存在）最终汇入水道中某一特定节点（如河流汇流点）的陆地区域。由于每条河流均配有唯一标识符"WB_ID"，因此该数据集可直接与其关联的WFD河流水体建立关联。 本数据集还涵盖了未通过河流水体、直接汇入沿海或河口水域的陆地区域。此类区域的"WB_ID"为数字格式，"WB_Cat"字段取值为"沿海集水区（Coastal Catchment）"，且全部命名为"不属于河流水体集水区"。版权声明：© 英国环境署（Environment Agency）2015年版权及/或数据库权，保留所有权利。