Stormwater Control Proprietary Device Polygon

For more information about this layer please see the GIS Data Catalog. Proprietary Device Polygon Component Types--- Hydrodynamic Separator: Hydrodynamic Separators are stormwater management devices that use cyclonic separation to control water pollution.--- Media Filter: Filtration system that uses a variety of media types to filter contaminants.--- Alternative Infiltration Systems: Other infiltration systems that are similar to vaults, tanks and trenches, but do not meet the standards of these features.如需了解该图层的更多信息，请参阅地理信息系统（GIS）数据目录。 专有设备多边形组件类型： --- 水力旋流器（Hydrodynamic Separator）：水力旋流器是采用旋流分离技术管控水污染的雨水管理设施。 --- 介质过滤器（Media Filter）：采用多种介质类型过滤污染物的过滤系统。 --- 替代渗透系统（Alternative Infiltration Systems）：与地下储槽、储罐及沟渠类似，但未达到此类设施标准的其他渗透系统。