Sensitive Areas - Eutrophic Rivers

This record is for Approval for Access product AfA249-1 Sensitive Areas – Eutrophic Rivers. This dataset consists of 3 shapefiles showing the extent of Urban Wastewater Treatment Directive (91/271/EEC) (UWWTD) sensitive areas (eutrophic). The UWWTD describes eutrophication as ‘the enrichment of water by nutrients, especially compounds of nitrogen and/or phosphorous, causing an accelerated growth of algae and higher forms of plant life to produce an undesirable disturbance to the balance of organisms present in the water and to the quality of the water concerned’. The UWWTD regulates the collection and treatment of waste water from homes and from industry. In the UK, the Directive is implemented through the Urban Wastewater Treatment Regulations 1994. Under these Regulations, water bodies that are (or may soon become) eutrophic should be designated as sensitive areas by Defra. This applies to still fresh waters, rivers, estuaries and coastal waters. This dataset consists of: • rivers currently designated as UWWTD eutrophic sensitive areas • lakes currently designated as UWWTD eutrophic sensitive areas • shows harbours and estuaries currently designated as UWWTD eutrophic sensitive areas Attribution statement: © Environment Agency copyright and/or database right 2015. All rights reserved.本记录对应准入产品AfA249-1《敏感区域——富营养化河流》的审批事项。本数据集包含3个形状文件（shapefiles），用于展示《城市污水处理指令（91/271/EEC）》（Urban Wastewater Treatment Directive，缩写UWWTD）所定义的富营养化敏感区域范围。《城市污水处理指令》将富营养化定义为：“水体因营养物质（尤其是氮和/或磷化合物）发生富集，导致藻类及高等植物异常增殖，进而对水体中原有的生物平衡及相关水质造成不良干扰”。 该指令规范了家庭与工业废水的收集及处理流程。在英国，此项指令通过《1994年城市污水处理条例》落地实施。根据该条例，环境、食品与农村事务部（Defra）需将已出现或即将出现富营养化问题的水体划定为敏感区域，适用范围涵盖静止淡水、河流、河口及近岸海域。 本数据集包含以下内容： • 当前被划定为UWWTD富营养化敏感区域的河流 • 当前被划定为UWWTD富营养化敏感区域的湖泊 • 展示当前被划定为UWWTD富营养化敏感区域的港口与河口 归属声明：© 环境署（Environment Agency）版权及数据库权益 2015年所有。保留所有权利。