Low priority on waste management has impacted the complex environmental issue, where this study found out up to 24.3% of waste generation in Jakarta and Bandung is emitted to the waterway due to the high intensity of human activity in the urban area. In this study, we investigated the viable integration between material flow analysis and leakage hotspot modelling to improve the management strategy of the plastic pollution in the water system and open environment. Using the multi-criteria assessment through the plastic leakage from its management, a material flow analysis has developed on the city scale. Comprehensively identifying using potent identification and hydrological characterization, plastic waste from Jakarta city has occasionally estimated 2603 ton discarded to Ciliwung River while the plastics from Bandung Area has contributed to 1547 ton, addressing Cikapundung River as the main tributary of Citarum mainstream in annual basis.
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