Urban densification has attracted much attention in recent times, particularly in addressing certain urban problems such as urban sprawl and promoting compact development, though problems of unplanned densification are yet to be addressed in the literature. This paper examines space and time dynamics of urban densification, where patterns and changes in the residential densification of Bida urban area in Nigeria are assessed. The study relied on point features representing buildings for the years 2008, 2013, and 2018 digitized using ArcGIS 10.6. The data were analysed using Point Density spatial method to develop the spatiotemporal models which were further reclassified into three categories: low, medium, and high densities, respectively. The paper has found out that residential densities increase along the urban-rural gradient with clear evidence for unplanned urban densification as a result of the organic growth. Therefore, there is the need for planned densification in urban development which can curb the increasing residential density that reduces green and open spaces.
Adverse interrelationships between man and his environment has been the main cause of disequilibrium, which usually result in negative effects to man himself, his environment and his survival as epitomized by the current global climate change phenomenon. This study applied the concept of Health Impact Assessment (HIA), an evolution of Environmental Impact Assessment (EIA) to predict the health impact of the proposed community-based solid waste management facility in Ilorin metropolis; which is a part of the Millennium Development Goals' (MDG) Health and Environmental Sustainability Projects (Goals 4-7). Through systematic sampling methods data was collected from four administrative wards in the metropolis for this work. Using The Nigerian Institute of Town Planners' (NITP) guidelines on impact assessment, the study was able to discover that there are many benefits derivable from the proposed project, however, there can be negative impacts too even if the Environmental Management Plan and project operational guidelines are strictly adhered to. This gives the need for overall assessment of such projects as against the practice of benefit analysis usually embarked upon by proponents of such investments. The study further suggested different participatory approaches in establishing the sustainability of projects.
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