Conceptual modelling for improving quality of surface water abstraction in Jakarta, Indonesia

The problems associated with the unsatisfactory state of water supply and quality within the Citarum/Ciliwung catchment that feeds directly to the city of Jakarta are reported. The various complex mechanisms of waterways along with the dispersion pathways of pollutant discharges are discussed. The principal elements of a conceptual model for the watershed are introduced, which covers the upstream of the intake at Buaran Water Treatment Plant that feeds the eastern part of Jakarta. The proposed conceptual model should, in the long run, provide a valuable tool for testing the appropriateness of adopting different management strategies for cost-effective solutions.