Urban Building Intensity and Daily Accessibility of Green Space: A Specific Assessment for Megacities

Urban green space (UGS) is widely recognized as a core component of sustainable urban development in megacities. The study of the synergistic relationship between high-intensity urban development and daily accessibility of UGS, however, remains insufficient. This paper therefore critically assesses the inherent correlation between building intensity and the UGS daily accessibility in a typical megacity context. The analysis is twofold: What is the inherent correlation between building intensity and the daily accessibility of UGS in megacities? And, if such a correlation exists, how can daily accessibility be improved by integrating building intensity into the UGS planning process? Using a case study in Beijing, methods of multi-source data integration, GIS spatial analysis, and statistical correlation models are used to address the issues. Results indicate that building intensity exhibits a statistically positive spatial association with the Daily Accessibility Index (DAI). Mere expansion of the total UGS area does not necessarily lead to improved daily accessibility for residents. The findings include a clarified dual-effect mechanism of high-intensity development on UGS services, as well as evidence-based planning strategies for sustainable UGS layout in dense megacities.