Authors: Raegan Alex. A, Jyothi Gupta
Abstract: Aim: This paper reviews urban expansion through space and time in Chennai city (a megapolis of India) based on GIS technology etc, and investigates ways to integrate blue-green infrastructure, i.e., wetlands, riverscapes, greenscapes into the development for climate adaptation, resilient cities & sustainable growth. Research Question: What can GIS show us about Chennai’s ancient land use changes and urban expansion? What are the possibilities of climate-proofing resilience and promoting sustainable urban development with blue-green infrastructure? Methodology: Ten research papers were analyzed, and core concepts were determined as well as gaps identified. The Shapefile/GIS data was obtained and studied to observe the pattern of city growth. For identifying potential areas for BGI and urban resilience interventions, the land use/land cover changes were mapped. Results: GIS based analysis identified speedy urbanization in and around OMR and GST Road at the cost of wetlands, agricultural land, and open spaces. Map of vegetation, water bodies showed areas to reclaim for restoration. The rivers, sewers, sumps and metro lines became avenues for blue-green infrastructure projects. Zones for planning interventions were determined using highway networks and administrative boundaries. A mapping of priority areas for flooding, urban cooling and sustainable development was conducted. Conclusion and Limitation: Urbanization of Chennai has shrunk green and blue spaces, a situation that emphasizes the urgency for incorporating blue-green infrastructure to improve climate resilience. Challenges that people faced around the country included access to up-to-date ward boundaries, transforming shapefiles and high prices of datasets. Sensitve areas for restoration and management had been successfully mapped if imperfectly served by maps
DOI: http://doi.org/10.5281/zenodo.17878089
