Empowering a sustainable urban future: The key role of coordinated settlement development for optimising energy efficiency and socio-economic welfare

The nexus between urbanisation and energy transition represents a critical juncture in the pursuit of sustainable development. As cities continue to grow and expand, their energy needs rise, driving consumption and emissions. Simultaneously, efforts to transition towards renewable energy sources and improve energy efficiency are underway to mitigate climate change and reduce dependence on fossil fuels. However, urbanisation poses a challenge to these efforts, as sprawling cities require more energy for transport, infrastructure and buildings. Reconciling the need for urban development with sustainable energy practices requires integrated spatial planning approaches that consider the spatial layout of residential areas, land use patterns and transport systems. To address this nexus, our study explores the complex interplay between energy efficiency and urban development, alongside communities' quality of life, which is crucial for urban sustainability. We have developed a settlement network model that integrates socio-economic factors and the spatial distribution of energy consumption. Using a U-NSGA 3 algorithm, we have attempted to optimise future settlement network to simultaneously improve the two goals of energy efficiency and socio-economic factors. By optimising settlement networks, we shed light on the relationship between energy efficiency and communities' quality of life arising from different urban development patterns, offering insights for strategic spatial planning and technological advances. Using insights from a Swiss case study, we delineate modified strategies encompassing coordinated development, densification and the use of electric vehicles and building insulation. The results offer practical solutions for policymakers and spatial planners dedicated to fostering sustainable urban development. The overall conclusion underscores the critical significance of a coordinated approach to urban development in attaining overarching sustainability objectives.