The master plan for the Delhi, India sanitation system, to be built by 2031, will ensure that comprehensive, technically and financially viable plans are in place for the implementation of sewerage and non-sewerage works to improve the general sanitation conditions and enhance the water quality of the Yamuna River. The project also covers the entire National Capital Territory of Delhi, with a 1,500-square-kilometer area, divided broadly into two categories comprising sewered and un-sewered areas.

AECOM Technology Corp.,, Los Angeles, Calif., has provided professional, technical, and management support services for public and private sector clients in more than 130 countries around the world and is using the SewerGEMS V8i Software from Bentley Systems,, Exton, Pa., solution to create hydraulic models of the sanitation systems in Delhi. The project is part of a contract with Delhi Jal Board (DJB) to develop the master plan for Delhi’s sanitation system.

The population of Delhi has increased from 4 million people in 1971 to approximately 18 million today. The fast growing population, coupled with slow development in sewerage infrastructure, has posed a major threat to the city’s sanitation system, river water quality, and health of the people in the area. Only about 55% of the population has access to a centralized sewerage system. In response to this challenge, AECOM is working with DJB to develop a holistic, integrated and sustainable sewerage master plan.

In an integrated approach to sewered areas, AECOM is conducting performance audits on 30 existing sewage treatment plants at 17 locations, along with hydraulic modeling of existing trunk sewers. As part of the master plan, AECOM is using Sanitary SewerGEMS V8i to connect the project team. To complete the hydraulic modeling, the team proposed that a wastewater management information system be developed with an integrated enterprise GIS (geographic information system). Using SewerGEMS, the data has been consolidated into a single hydraulic model for verification and to identify problem areas.

SewerGEMS provided a number of benefits: the team was able to save up to 3.5 hours persix people for every eight working hours, which on average saves nearly 400 working hours per month. The client has access to the whole sewerage network in a centralized system that includes all essential attributes needed for asset management.