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<p>With Delhi’s rapidly mounting population and rampant unplanned urban development, the neglect of Blue–Green Infrastructure (BGI) has exacerbated critical urban challenges such as waterlogging, depletion of groundwater resources, and the intensification of the urban heat island effect. These issues are not unique to Delhi but are shared by many cities in the Global South facing similar pressures. Despite BGI being acknowledged in the Master Plan of Delhi-2041, there remains a significant gap in applying spatially informed, multi-criteria methods to guide its strategic implementation.</p><p>This study proposes a GIS-based Blue–Green Infrastructure Suitability Model (BGISM) for Delhi, aimed at facilitating data-driven site selection for BGI planning. Adopting a Multi-Criteria Analysis (MCA) framework integrated with the Analytical Hierarchy Process (AHP), the model evaluates various spatial and environmental parameters including land use/land cover, existing green and blue assets, slope, soil infiltration capacity, groundwater levels, and rainfall distribution. These criteria were weighted based on insights from previous studies through AHP and overlaid using ArcGIS Weighted Overlay Analysis to produce a composite BGI suitability map.</p><p>The resulting map identifies a range of high-suitability zones across Delhi for targeted BGI interventions, offering a strategic planning tool for urban resilience, ecological restoration, and climate adaptation. From an environmental urban planning perspective, the BGISM model provides a replicable and scalable methodology that bridges science and policy, enhancing the city’s capacity to design inclusive, multifunctional, and sustainable urban spaces. The study underscores the critical role of spatial decision support systems in advancing integrated urban water management and resilient land use planning.</p>

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Suitability analysis for Blue Green Infrastructure in urban area: Delhi

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Kajal Goyal,
  • Rabidyuti Biswas

摘要

With Delhi’s rapidly mounting population and rampant unplanned urban development, the neglect of Blue–Green Infrastructure (BGI) has exacerbated critical urban challenges such as waterlogging, depletion of groundwater resources, and the intensification of the urban heat island effect. These issues are not unique to Delhi but are shared by many cities in the Global South facing similar pressures. Despite BGI being acknowledged in the Master Plan of Delhi-2041, there remains a significant gap in applying spatially informed, multi-criteria methods to guide its strategic implementation.

This study proposes a GIS-based Blue–Green Infrastructure Suitability Model (BGISM) for Delhi, aimed at facilitating data-driven site selection for BGI planning. Adopting a Multi-Criteria Analysis (MCA) framework integrated with the Analytical Hierarchy Process (AHP), the model evaluates various spatial and environmental parameters including land use/land cover, existing green and blue assets, slope, soil infiltration capacity, groundwater levels, and rainfall distribution. These criteria were weighted based on insights from previous studies through AHP and overlaid using ArcGIS Weighted Overlay Analysis to produce a composite BGI suitability map.

The resulting map identifies a range of high-suitability zones across Delhi for targeted BGI interventions, offering a strategic planning tool for urban resilience, ecological restoration, and climate adaptation. From an environmental urban planning perspective, the BGISM model provides a replicable and scalable methodology that bridges science and policy, enhancing the city’s capacity to design inclusive, multifunctional, and sustainable urban spaces. The study underscores the critical role of spatial decision support systems in advancing integrated urban water management and resilient land use planning.