Geospatial indicator analysis as a tool for managing urban blue-green infrastructure in cities

Abstract Sustainable urban management in the context of climate change requires effective tools to identify areas with reduced environmental resilience and implement blue-green infrastructure (BGI). This study focuses on developing an indicator-based spatial analysis method that enables precise identification of areas requiring adaptive measures and the selection of optimal nature-based solutions. The method relies on the use of indicators related to land sealing, urban heat island occurrence, accessibility to green spaces, biologically active areas, and the Normalized Difference Vegetation Index to classify risks and determine intervention priorities necessary for effective blue-green infrastructure management in cities. The research was conducted using Olsztyn, a Polish city, as a case study. The analysis results indicate significant spatial differences in vulnerability to the negative effects of climate change, highlighting the need to tailor BGI strategies to local conditions. The developed method not only supports adaptive management but also facilitates effective spatial planning that accounts for both ecosystem and social needs. The application of indicators in BGI management enables more informed decision making regarding urban development, increasing cities' resilience to climate change while improving residents' quality of life. The study results emphasize the necessity of further developing analytical tools and integrating social participation in the planning process, which can contribute to the more effective implementation of adaptation strategies and the management of blue-green infrastructure in cities.