Concept and Implementation of River Corridor to Ensure Environmental Sustainability of Citarum River, Indonesia

The river corridor is literally a spatial passage that runs along the riverbanks. The corridor’s width varies significantly depending on its intended function, land-use designation, and the associated ecological and socio-economic benefits. In this study, the river corridor is defined in terms of its role in sustaining the river ecosystem, particularly as a water source and in preserving the integrity of its hydrological substance. The primary objective of this study is to examine both the conceptual framework and the practical implementation of river corridors in promoting environmental sustainability, using the Citarum River in Indonesia as a case study. The research area covers the entire stretch of the Citarum River, from its upstream origin (km 0) to the Citarum River, Indonesia. Key parameters analyzed include river morphology, land use patterns, geospatial technology applications in land-use monitoring, anthropogenic activities, and the physical condition of the river from the thalweg (deepest channel) extending 1 km laterally on both the left and right banks. Data were collected through an integrative approach combining literature review, field observation, photographic documentation, and in-depth interviews with local residents living along the river corridor over the past two years. The study identifies both conceptual insights and implementation cases of the river corridor framework within the study period. These findings lead to the formulation of evidence-based recommendations rooted in nature-based solutions aimed at ensuring the sustainable management and restoration of river ecosystems.