earticle

영어

The increasing concentration of population in major metropolitan areas has led to population decline and a rise in underutilized land in surrounding cities. This demographic shift has resulted in a proliferation of vacant urban spaces, especially in shrinking cities, where a lack of management perpetuates pollution and exacerbates ecological degradation. To address these environmental challenges, this project aimed to restore the ecological functions of abandoned urban spaces through strategic design interventions. Overlay analyses of terrain, soil, and drainage were conducted to identify optimal intervention sites. Based on these analyses, a master plan was developed that integrates six types of wetland-based blue infrastructure: natural wetlands, vegetated swales, infiltration basins, plant islands, paddy field wetlands, and bio slopes. Pollution reduction for each model was quantified. Geodesign was used to systematically identify pollution sources and to design optimized solutions for maximum purification and storage efficiency. Application of the proposed model to the Han River catchment resulted in a 16-fold increase in stormwater retention during monsoons and a 4-fold increase during droughts. Pollution loads were reduced by 11% for BOD, 10% for total nitrogen, and 18% for total phosphorus. These results demonstrate that the proposed model effectively enhances ecological resilience and water quality management, while reducing unnecessary financial and time costs.