Spatio-temporal patterns and accessibility of green spaces in Kumasi, Ghana

Abstract

Urban green spaces (UGS) are a central part of cities and offer multiple ecological and social benefits necessary for a higher quality of life of inhabitants. However, rapid unguided urban growth together with planning policies on rezoning can lead to transformation of UGS to commercial, residential, and other uses. These processes of land use change result in inequities in the distribution of UGS in the city. Yet, data and metrics that capture changes in the geography of UGS is scarce within African cities. This paper addresses this need by examining the spatio-temporal geography of UGS at the neighborhood-scale in Kumasi, the next biggest city in Ghana. Five (5) UGS distribution indicators were computed from remote sensing data for 2013 and 2020 and compared across neighborhoods. Further, a GIS network analysis method was deployed to analyse access to parks in Kumasi. The results showed that between 2013 and 2020, green spaces in Kumasi became fragmented and disconnected despite a slight increase in quantity. The level of UGS fragmentation was found to significantly vary among the neighborhoods. Fragmentation and depletion in UGS were profound at the outskirts of Kumasi while majority of the population cannot access the nearest park under 30-min’ walk. These findings contribute to a complete and holistic understanding of the distribution and accessibility of UGS at the neighborhood level in cities and disparities in UGS exposure in the Global South. The findings provide important insights for urban policies while the data and methods serve as blueprints for local authorities, particularly in Ghana to track their progress towards achieving Sustainable Development Goal 11, target 7.