A REMOTE SENSING-BASED APPROACH TO COUNTER ILLEGAL ENCROACHMENT AND WATERLOGGING IN THE HINJEWADI REGION

The online version of the volume will be available in LNCS Online. This study has demonstrated that the chronic waterlogging crisis in Pune's Hinjewadi IT corridor is fundamentally a man-made planning and governance failure, not an act of nature. The multi-temporal LULC analysis provides clear quantitative evidence of this failure: between 2011 and 2025, built-up impervious surfaces expanded by 133.5% (+2,030 ha), while natural water bodies shrank by 61.4% (−510 ha). This massive increase in impervious surfaces has generated unprecedented volumes of surface runoff, while the natural drainage networks and retention ponds that historically stored and attenuated this water have been systematically reclaimed and eliminated. The proposed QGIS techno-legal overlay framework successfully georeferenced the PMRDA Development Plan onto high-resolution 2025 satellite imagery, establishing a robust and legally defensible workflow for encroachment detection. The workflow was validated against official PMRDA ground-truth data, successfully identifying and mapping illegal buildings and paved surfaces blocking natural stream channels at Bhoirwadi and Mann. This framework is transferable to other technology corridors and rapidly urbanizing peri-urban landscapes throughout India and South Asia, offering a scalable, data-driven path toward more resilient, equitable urban development.

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