Drainage - Chambers

Point feature class displaying drainage chambers apart of the City's drainage network. These chambers are classified as energy dissipator chamber, oil interceptor, and sump. For example, an oil interceptor traps and seperates free surface oils and grease from the stormwater runoff. Updated as an ongoing process.本数据集为点要素类（Point feature class），用于展示隶属于城市排水管网的排水井室。此类井室分为三类：消能井（energy dissipator chamber）、隔油井（oil interceptor）与集水井（sump）。例如，隔油井可截留并分离雨水径流（stormwater runoff）中的游离态浮油与油脂。本数据集将持续进行更新维护。