Climate Change, Population Growth and Urbanisation: Challenges for Urban Water Management
Climate change, population growth and urbanisation present critical challenges for water management in urban areas. The intensification of extreme hydrological phenomena, such as prolonged droughts and floods, has made water security increasingly uncertain. These challenges require integrated solutions that take into account not only the technical aspects of water management but also urban planning, with the aim of mitigating the impacts of extreme events and promoting water circularity.
Indeed, the adaptation of cities to climate change in the urban water sector depends mainly on factors related to institutional collaboration and urban planning, being less influenced by the ”state of the art” of the technologies involved.
Key Challenges
From the perspective of urban water management entities, the main challenges include infrastructure sizing, identifying new water sources, managing supply and demand, and locating treatment facilities, which, in the case of wastewater treatment, can become new sources of water ”fit for purpose”. On the other hand, for the entities responsible for spatial (and building) planning, challenges arise in the allocation of economic activities, the definition of construction guidelines (such as the implementation of dual plumbing systems, water retention in green elements, and ensuring permeable soils) and the development of ”blue” and ”green” infrastructure. These latter should combine water retention and infiltration with climate regulation, while simultaneously creating leisure and recreational spaces. It is thus evident that there is a symbiotic, almost mutualistic, relationship between these two sectors, with each contributing to the adaptation of cities to climate change.
To minimise risks, increase resilience, reduce costs and generate positive externalities, it is clear that climate adaptation in urban areas requires close collaboration between management entities and those responsible for urban planning. This integration is essential to address challenges such as the need for infrastructure rehabilitation/conversion, the growing demand for water and vulnerabilities related to changing climatic conditions.
Barriers and Drivers of Collaboration
Despite its importance, collaboration between the water and planning sectors faces significant barriers, such as a lack of institutional coordination, the perception of longer decision-making times, discrepancies in timelines between sectors, and legal limitations. Conversely, the implementation of national adaptation strategies and the strengthening of legal frameworks have been identified as key drivers for promoting collaboration.
Recommended Collaborative Practices
According to recent studies, effective collaborative practices between the water and urban planning sectors should include:
- Promotion of intersectoral collaboration: Integrate and operationalise this collaboration through coherent policies and regulations;
- Harmonisation of strategic plans: Align master plans (water and land) and construction guidelines with national and municipal resilience strategies;
- Definition of accessible technical solutions: Propose practical solutions that different actors can easily implement;
- Incorporation of scientific advances: Promote partnerships with academic institutions to integrate technical developments and foster training;
- Citizen engagement: Inform and mobilise the population regarding the necessary changes for climate adaptation.
Collaborative Model for Climate Adaptation
The materialisation of these practices requires the implementation of a collaborative model that organically and continuously links the technical, institutional and social dimensions at the municipal level. This model should bring together technical and institutional solutions that promote the inclusion of all relevant stakeholders.
To achieve this, it may be appropriate to foster the creation of independent organisational structures designed as ”facilitators of change”. These structures, whether temporary or permanent, would be responsible for leading transition processes, promoting the implementation of collaborative measures, and ensuring effective interaction between institutions and communities.
Conclusion
Regardless of the main climatic trends affecting a city – whether water scarcity or excess – climate adaptation in the urban water sector depends on a close relationship between management entities and those responsible for spatial planning. This relationship is essential to identify and implement effective measures that respond to the challenges associated with urban water under any circumstances, ensuring the sustainability and resilience of cities in the face of climate change.
Vítor Vinagre
PhD in Energetic Systems and Climate Change
Asset Management Coordinator
Águas do Centro Litoral, S.A.
Portugal
vcvinagre@ua.pt
Back to Table of Contents