ECA - Riparian Corridor

Displays areas with Riparian Corridors in the City of Seattle. See Ordinance Number: 122738. A polygon feature class showing Riparian Corridors in Seattle. Used to implement and regulate the City of Seattle's Environmentally Critical Areas (ECA) policies. The riparian corridor includes the riparian watercourse and the riparian management area. The riparian watercourse is the watercourse of Type F, Np, and Ns waters defined in WAC 222-16-030 and 222-16-031 that have fish or wildlife habitat. The riparian management area is the area within 100 feet of the riparian watercourse measured horizontally landward from the ordinary high water mark of the watercourse as surveyed in the field, or from the top of the bank if the ordinary high water mark cannot be determined. For more information about the definition of riparian corridors, see Seattle Municipal Code section 25.09.012, Environmentally Critical Areas (ECA) definitions. Updated as needed.本数据集展示西雅图市境内河岸走廊（Riparian Corridors）的分布范围，相关依据为第122738号市政条例。本数据集为用于呈现西雅图市河岸走廊的多边形要素类（polygon feature class），旨在落实并规范西雅图市环境关键区域（Environmentally Critical Areas, ECA）相关政策。河岸走廊由河岸水道与河岸管理区域两部分构成：其中河岸水道指符合WAC 222-16-030与WAC 222-16-031中定义的F类、Np类及Ns类水体，且具备鱼类或野生动物栖息地功能的水道；河岸管理区域指以实地勘测确定的水道普通高水位线为基准，向陆地方向水平延伸100英尺的范围，若无法确定普通高水位线，则以河岸顶部作为基准。有关河岸走廊的详细定义，请参阅《西雅图市政法典》第25.09.012节“环境关键区域（ECA）定义”。本数据集将根据实际需求进行更新。