Ecosystems in an urbanising world: Challenges and opportunities for symbiosis
In 2014, 54% of the world’s population lived in cities – a proportion that is expected to rise to 70% by 2050. Urbanization pose serious challenges to ecosystem health and human well-being. Traditional approaches have proven insufficient in response to these major demographic trends. In times of uncertainty and increasing vulnerability, the development of an urban ecosystem approach is crucial. Beyond Integrated Urban Water Management (IUWM), another way to achieve sustainable urban development can be working with nature to comprehensively reshape and retrofit urban areas. Reframing urban design and governance as part of an urban ecosystem has the potential to fully harness cities' vital contribution to sustainable development, human well-being, and resilience.
Session 1 will highlight case studies and best practices on the implementation of nature-based solutions that are key to building resilient cities. This includes going from grey towards green infrastructure and strengthening resilience in the face of floods and water scarcity, improving urban livelihoods and ecosystems in the process.
Chair: Guillermo Donoso
11:10 Keynote speech on Nature-Based solutions
Yolanda Kakabadse, Advisory Council WWF Lac
11:20 Pitches on Nature-Based Solutions in localities across the world
- Christina Wikberger, City of Stockholm
- Rewad Ashour, OBAID Integrated Solutions
- Loan Diep, University College London
- Deepthi Wickramasinghe, University of Colombo
- Dave Murray, Canadian Water Resources Association
11:35 Roundtable discussion chaired by the abstract presenters
What are key factors of success in applying Nature-Based Solutions in localities across the world?
12:15 Feedback from roundtables
Moderator: Cléo Loussouarn, Greater Paris Sanitation Authority
12:25 Concluding remarks
12:30 End of session
Green cities are known to share similar characteristics, ranging from an abundance of public green space and transportation to walkable city designs and mixed use. Commonly cited benefits include reduced fossil-fuel use, improved resilience to floods, droughts and heat, improved air and water quality, and resource recovery from solid and liquid waste. At the same time, green cities may well stimulate economic growth and innovation and create jobs.
The objective of the seminar ‘Ecosystems in an urbanising world: Challenges and opportunities for symbiosis’ was to examine the potential of integrated urban and ecosystem development to maximise human well-being, environmental quality and resilience in cities. First, the seminar highlighted case studies and best practices on the implementation of nature-based solutions that are key to building green cities, for example flood protection through wetland restoration or drinking water security through aquifer recharge. Second, the seminar examined planning and governance tools to unlock these best practises, where tools ranged from multi-criteria analysis to integrate water management and land-use planning and mapping and participatory exercises to retrofit the urban fabric of slums in the global south. Third, the seminar provided a platform for distinguished professionals to reflect on the road ahead towards symbiotic urban and ecosystem development.
Key messages of the discussion included that (1) grey, green and blue infrastructure are not antagonistic but rather complementary, (2) green solutions can be associated with political prestige for decision-makers and substantial long term benefits, and (3) ecosystems are public goods and thus should be managed as assets.
The seminar concluded that although examples of successful implementation of NBS are abundant -- as evident by the wide-ranging case studies presented -- there is a ‘missing link’ between local solutions and large-scale implementation. In the process of the shift in focus from large-scale and centralised infrastructure towards nature-based solutions, urban stakeholders could also use a bit more guidance as to the type of solution that is suited to the local context.
Policy recommendation 1. Reveal the true value of NBS to help both civil society and political leaders to make a case for them. Thus a platform to share experiences, e.g. ranked against standard metrics, will help to ensure that successful NBS are replicated in comparable situations. This implies the need of continued development of indicators and tools for comparative analysis, such as those presented in this seminar, to facilitate peer-2-peer learning as a proven way to exchange best practises.
Policy recommendation 2. Acknowledge the position of urban residents at the heart of symbiotic urban and ecosystem development. In numerous case studies, urban residents unlocked the political will to invest in Nature Based Solutions. In light of the strong impact of how cities use and manage natural resource on urban quality of life, users are the drivers of lasting change. In practise this means bolstering the use of participative decision-making and co-design of nature-based solutions.