The Proximity of Urban Green Spaces as Urban Health Strategy to Promote Active, Inclusive and Salutogenic Cities

Urban Green Spaces (UGS) have several positive effects on Public Health, environmental quality, and cities’ resilience to climate change; UGS are crucial in urban regeneration actions and urban health purposes. Moreover, to better define the UGS’ health impacts, it is important to define and guarantee UGS’ proximity, accessibility, and quality. Aim of the research is a quali-quantitative assessment of the UGS in Italian metropolitan cities, taking Milan, Turin, Florence, and Bologna as preliminary case studies. One of the 1st phases was to draw up dynamic and descriptive GIS-based maps of the relationships between density of population and of urban fabric, UGS’ availability, and their accessibility. Only the areas with a size greater than 15,000 square meters were considered; three buffer zones of proximity were defined: 250, 500, and 750 m. By combining the UGS’ availability with the population’s density, it was possible to quantify the citizens included in the three buffer zones. From the 1st analysis, it is observed that about 90% of the population is served by a quality green area within a buffer area of 750 m; 78% by the buffer zone of 500 m; 49% by the buffer zone of 250 m. Both the elaborated maps and graphs obtained show how population is not equally served by close and accessible UGS. Their geo-localization it’s a preliminary quantitative step (process started in Italy with the introduction of regulations like green areas’ census, mapping, maintenance legislation, and strategic plans), but it’s even more crucial to evaluate the UGS’ quality in terms of accessibility, safety and security features, provision of services and paths.