Green Infrastructure in the Space of Flows: An Urban Metabolism

Recent research demonstrates that urban metabolism studies hold ample scope for informing more sustainable urban planning and design. The assessment of the resource flows that are required to sustain the growth and maintenance of cities can allow gaining a clear picture of how cities operate to comply with environmental performance standards and to ensure that both human and ecosystem health are preserved. Green infrastructure (GI) plays a key role in enhancing both cities’ environmental performance and health. For example, GI interventions mitigate the Urban Heat Island effect (improved thermal comfort), reduce particulate matter concentration (healthier air quality), and sequestrate and store atmospheric carbon (climate change mitigation). Research on ecosystem services and the application of the concept in urban planning provides a growing evidence base that an understanding of provisioning and regulating services can facilitate more environmentally informed GI planning and design. The contribution of GI in enhancing human health and psychological wellbeing is also evidenced in recent studies valuing both material and immaterial benefits provided by urban ecosystems, including cultural ecosystem services. Therefore, the use of ecosystem service frameworks can help reveal and quantify the role of GI in fostering both urban environmental quality and the wellbeing of human populations. However, there remains little discussion of how health and wellbeing aspects can be integrated with environmental performance objectives. In this chapter, urban metabolism thinking is proposed as a way forward, providing analytical tools to inform environmentally-optimized strategies across the urban scales. Opportunities to foster integrated urban metabolism approaches that can inform more holistic GI planning are discussed. Finally, future research avenues to incorporate the multiple dimensions of human health and wellbeing into urban metabolism thinking are highlighted

In Hulsmann, S.; Jampani, Mahesh (Eds.). A nexus approach for sustainable development: integrated resources management in resilient cities and multifunctional land-use systems. Cham, Switzerland: Springer

The Nexus Approach to environmental resources management is increasingly recognized as an important vehicle to achieve sustainability as spelled out in the Sustainable Development Goals (SDGs). In particular, it was argued that the Nexus Approach is key for the sustainable use of environmental resources under conditions of global change and provides a tool to deal with challenges of global change including climate change, urbanization and population growth. Building on conceptual considerations with regard to monitoring and implementation outlined earlier, here, we explore how the Nexus Approach may provide solutions for managing resources in multifunctional land-use systems and resilient cities. In fact, the resources perspective is essential for holistic management of water, soil and waste along the urban–rural axis. Peri-urban areas provide perfect examples of multifunctional systems with manyfold opportunities to closing cycles, improve resource efficiency and mitigate trade-offs. Cases described in this book provide both positive as well as negative examples of what can be achieved by applying nexus thinking and what goes wrong if you don’t. Key messages emerging include: (i) participatory approaches are a central element for successful implementation of a nexus approach, (ii) effective mechanisms of knowledge transfer are a prerequisite of adoption and upscaling of nexus approaches and (iii) the lack of economic incentives and lack of data represent major challenges for the implementation of a nexus approach. Overall, the importance of a nexus mindset of all stakeholders involved in nexus cases and of providing an enabling environment by nexus-oriented governance, including appropriate economic instruments, was confirmed

Circular Approach in Green Planning Towards Sustainable Cities

Cities are like organisms, drawing in resources and emitting wastes. In nature, organisms are related to ecosystems characterized by a circular metabolism, so a green planning to move towards sustainable cities needs to adopt a circular approach to the way in which are managed the resources consumed (materials, food, energy, water and land) and the emissions produced (solid waste, airborne and waterborne) in cities and their related territories. Initially, the origins of the theme of circularity are illustrated, in particular, in relation to urban applications (urban metabolism) and territorial (industrial ecology) and current developments, with the analysis of a virtuous example. Thereafter, some possible strategic approaches to favour urban circularity (urban mining, building regeneration) are analysed, highlighting the importance of flow mapping and the creation of exchange platforms. Finally, some methods of assessing environmental impacts are shown to verify the effectiveness of circularity with respect to the objective of sustainability, and examples of benchmarks/targets adopted in some concrete cases experienced are presented

The role of wetlands in mitigating the effect of climate change in Nigeria

This chapter reviews the place of wetlands in climate change within the overall frame of environmental resource planning. This is against the background of the importance of wetlands as environmental resources which have been described as the kidneys of the landscape as a result of its hydrological and chemical functions and as atmospheric carbon sinks which stabilize the climate. The study reviewed mitigating and adapting measures in literatures that may be adopted in Nigeria in order to enhance the potentials of wetland resources in the country. The chapter asserts that the declining environmental resource base of the country is mainly due to anthropogenic influences because wetlands in Nigeria are largely exploited for economic gains and are basically used for subsistence living or for physical development. Statistical data from the government shows that 60 % of Nigerian population depend solely on the natural resource base and are engaged in farming, cattle rearing, and fishing. This chapter provides measures which include restoration programs, reduction of further disturbance on wetlands, and legislative and policy formulations for protecting wetlands which are considered appropriate and can contribute greatly in mitigating climate change when properly harnessed as a way forward toward climate change mitigation and adaptation