Perpustakaan Digital ITB

Urban rivers in Indonesia are increasingly experiencing severe water-quality deterioration due to rapid urbanization, population growth, and insufficient wastewater treatment infrastructure. The Cikapundung River in Bandung, a vital tributary of the Citarum River, represents a highly polluted urban stream receiving continuous discharges of untreated domestic sewage, greywater, and industrial effluents. These pollutant inputs have resulted in elevated organic loads, reduced dissolved oxygen levels, and increased nutrient and suspended solid concentrations, posing risks to aquatic life, public health, and downstream water users. To better understand the river’s condition and support effective management solutions, this study integrates field data collection, laboratory analysis, and water-quality modeling using the QUAL2K software. The targeted parameters—BOD, COD, DO, NH?, and turbidity—are measured at upstream, midstream, and downstream segments to evaluate spatial pollution variations. QUAL2K, a one-dimensional river water-quality simulation tool, enables calibration and validation of existing environmental conditions and provides predictive capability for evaluating pollution-reduction strategies. Scenario simulations will quantify pollutant loading, identify pollution hotspots, and assess the potential outcomes of management interventions such as wastewater treatment improvements or reductions in domestic discharge. The results are expected to deliver a reliable model that supports i evidence-based decision-making for urban river restoration while contributing to the sustainable management of the Cikapundung River and its role in improving the overall ecological health of the Citarum watershed. Keywords: Cikapundung River, water quality, domestic wastewater, industrial wastewater, pollutant load, BOD, COD, DO, ammonia, turbidity, QUAL2K, urban river pollution, Bandung, environmental modeling.