The observation: territories subject to climate risks and ecosystems threatened
In the context of increasing risks due to climate change, scarcity of water resources and the great fragility of ecosystems, the observation and restoration of natural environments can enable societies to adapt more effectively.
Climate change will deeply affect hydrological cycles and water resources and disrupt ecosystems. By 2030, global water requirements are expected to be 40% higher than available reserves and about 25% of species may disappear by 2050 due to climate change.
Protection against natural hazards has historically relied on the construction of civil engineering works that have an impact on ecosystems, whereas about 40% of the world economy depends on their proper functioning and may even increase the risks (dams for downstream flooding, for example, or dikes sized to protect against a current event but which become dangerous when an exceptional raising of event occurs). In addition, these solutions sometimes offer insufficient protection and flexibility, especially in view of the raising of sea level or the increasing extreme events frequency. They also require regular additional investments for maintenance and / or resizing.
 Water for a sustainable world’ The United Nations World Water Development Report (WWDR) (2015).
 Thomas et al., Extinction risk from climate change, 2004, Nature.
 Programme des Nations Unies pour l’Environnement.
 From 30 cm to 1m (or 2m for some experts) in the world, n°367 avril 2017, Alternatives économiques, pp.54-56.
An integrated approach with nature-based solutions
Nature-based solutions are attracting an increasing interest in building a more harmonious future between man and nature in the context of climate change. These solutions e.g. ecological engineering, green infrastructure, or measures that promote the natural retention of water … are also multifunctional. Indeed, they can simultaneously increase the resilience of the territories to climate risks (droughts, floods, erosions, marine submersion …), play a role in biodiversity and meet other societal challenges such as protecting drinking water resources, food sovereignty, and health.
Often unrecognized and underestimated, these solutions are part of a global approach of the management of these risks and thus improve the adaptability of our societies to climate change.
This workshop, which, without considering a single solution, highlights combined projects responding to the needs and constraints of different territories, capitalizes on feedback to discuss and demonstrate the effectiveness of nature-based solutions implemented in response to the climate challenge. This event aims to mobilize public and private actors and to help them to have a better understanding of these alternative and complementary conventional solutions.