The Punggol-Serangoon Reservoir Scheme was developed by PUB in an ongoing effort to ensure long-term and sustainable water supply for Singapore. Together with Marina Barrage, they expanded Singapore’s water-catchment area from half its total land area to two thirds by next year.
At the same time, HDB is implemented the Punggol Waterway as part of HDB’s Remaking of the Heartlands plans for the development of Punggol 21+. The waterway links the Sungei Punggol and Sungei Serangoon Reservoirs. The design of the Waterway had to take into consideration the requirements for water-based recreational activities and drinking water storage. An extensive study was carried out for predictive water quality modelling in the short, medium and long term of the system comprising of the reservoirs and waterway.
SDWA and Deltares developed an extensive modelling framework based on coupled rainfall-runoff, loading, hydrologic, hydraulic, hydrodynamic and water quality models. The framework was built using Sobek and Delft3D with several modules. An innovative aspect of the modelling framework was application of the newly developed loads model to determine the pollutants from the catchment based on land use information.