Water Quality - Chapter 93 Existing Use Streams

National Hydrography Dataset NHDFlowline layer with spatial representation of existing water uses defined in Title 25 Environmental Protection, Department of Environmental Protection, Chapter 93, Water Quality Standards. The Pennsylvania Code just cited provides a definition for distinguishing between designated and existing use classification. This GIS layer displays these uses spatially on an interactive stream map. Public users can drill down to locations on the map to view and map the existing uses of the water bodies of interest. The layer can also be used in conjunction with other spatially referenced data for spatial analyses.本数据集为国家水文数据集（National Hydrography Dataset）NHDFlowline图层，可对《宾夕法尼亚州行政法规》第25篇环境保护篇、宾夕法尼亚州环境保护部第93章水质标准中定义的现有水体用途进行空间可视化表达。上述引用的法规文本提供了区分水体指定用途与现有用途分类的判定标准。此地理信息系统（Geographic Information System, GIS）图层可在交互式河流地图上对上述水体用途进行空间展示，公众用户可通过下钻地图点位，查看并绘制目标水体的现有用途分布。该图层还可与其他空间参考数据联用，用于开展各类空间分析工作。