EFFECTIVENESS OF STORMWATER PONDS AS WATER QUALITY MANAGEMENT SYSTEM ELEMENTS Case Study: Situ KAMPUS-UI System, Depok, West Java, Indonesia

Low Impact Development and Better Site Design (LID/BSD) terms include a series of techniques – known as Best Management Practices (BMPs), that reduce impervious cover, conserve natural areas, and use pervious areas to more effectively treat stormwater runoff, and promote " the treatment train approach " to runoff management. The goal of LID/BSD is to reduce runoff volume and mitigate site impacts of a development site. As one out of many structural BMPs, stormwater ponds are typically installed as an " end-of-pipe " BMP at the downstream end of treatment train. The size and outflow regulation requirements of stormwater ponds can be reduced using additional upstream BMPs. Removal mechanism of pollutant is primarily through settling. The research objective is to determine the level of Situ KAMPUS-UI System effectiveness as a series of ponds to reduce COD (Chemical Oxygen Demand) concentration. COD is one out of many water quality parameters that indicates the presence of domestic wastewater. The results proved that Situ KAMPUS-UI system which is installed as an " end-of-pipe " BMP at the downstream end of the treatment train, without any additional upstream BMPs is ineffective.