WSDOT - Stormwater Artificial Path - Office

This is a view of the ArtificialPath featureclass created with the following query: LifeCycleCurrentStatus= 'Active' AND (WSDOTownership in ('Yes', 'Unknown') OR WSDOTownership IS NULL) AND (SWLocationVerified IS NULL OR SWLocationVerified = 'No') This feature class contains WSDOT’s stormwater artificial paths. An artificial path is used to represent flow through a dispersion area, roadside slope polygon, or stormwater pond polygon when there is no other conveyance feature from the inlet to outlet structure. It is also used for areas where stormwater flow is briefly dispersed to sheet flow from the end of a conveyance and then concentrated again by another downstream conveyance prior to discharge. These paths are important for maintaining connectivity of the stormwater system GIS model. The majority of the data collected so far are within the Phase I and Phase II 2009 NPDES Municipal Stormwater Permit Areas.

本数据集为基于如下查询语句创建的ArtificialPath要素类（FeatureClass）视图：筛选条件为 LifeCycleCurrentStatus 等于「活跃（Active）」，且（WSDOTownership 取值为「是（Yes）」「未知（Unknown）」或为空值），且（SWLocationVerified 为空值或取值为「否（No）」）。该要素类包含华盛顿州运输部（WSDOT）的雨水人工路径。当进水口至出水口结构之间无其他输水设施时，人工路径用于表征流经扩散区、路边边坡面要素或雨水塘面要素的水流；其亦可应用于雨水水流从输水设施末端短暂扩散为片流后，在排放前由下游另一处输水设施再次汇聚的区域。此类路径对于维持雨水系统地理信息系统（GIS）模型的连通性至关重要。截至目前，所采集的绝大多数数据均处于2009年国家污染物排放消除系统（National Pollutant Discharge Elimination System, NPDES）市政雨水许可区域的第一阶段与第二阶段范围内。