WSDOT - Stormwater Vault - BMPs

This is a view of the StormwaterVault featureclass created with the following query: WHERE LifeCycleCurrentStatus= 'Active' AND (WSDOTownership in ('Yes', 'Unknown') OR WSDOTownership IS NULL) This feature class contains WSDOT’s stormwater vaults.Stormwater vaults include various best management practices with underground storage facilities that treat stormwater for water quality and quantity control. These processes occur by detaining runoff, allowing pollutants to settle out in underground storage units, and then releasing reduced flows at established rate standards.The majority of the data collected so far are within the Phase I and Phase II 2009 NPDES Municipal Stormwater Permit Areas.

本数据集为基于以下查询语句生成的雨水储存舱要素类（StormwaterVault Feature Class）视图：筛选条件为生命周期当前状态为‘活跃’，且华盛顿州运输局（WSDOT）所有权取值为‘是’‘未知’，或该字段为空值。该要素类收录了WSDOT管辖的雨水储存舱设施。雨水储存舱包含各类配备地下储存设施的最佳管理措施（Best Management Practices，BMP），用于开展雨水的水质与水量管控。其运作流程为：暂存径流，使污染物在地下储存单元中沉降析出，随后按照既定的流量标准释放经调控后的水流。截至目前，所采集的绝大多数数据均位于2009年版国家污染物排放消除系统（NPDES）城市雨水许可范围的第一阶段与第二阶段管控区域内。