EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Nature-based Solutions, mangrove restoration and global coastal flood risk reductions

Timothy Tiggeloven1, Eric Mortensen1, Thomas Worthington2, Hans de Moel1, Mark Spalding2, and Philip Ward1
Timothy Tiggeloven et al.
  • 1Vrije Universiteit Amsterdam, Institute for Environmental Studies, De Boelelaan 1087, 1081 HV Amsterdam, Netherlands
  • 2University of Cambridge, Department of Zoology, CB2 3EJ, Cambridge, United Kingdom

In order to mitigate the expected increase in coastal flood risk it is critical to better understand how adaptation measures can reduce that risk, including Nature-based Solutions. We present the first global scale assessment of the (future) flood risk reduction and the benefits mangrove restoration. Unlike previous studies on Nature-based Solutions, we provide a quantitative assessment of mangrove restoration and nature contributions to people in terms of monetary flood risk reduction, people exposed to flooding, and poverty indicators. We find that mangrove restoration is an effective measure to contribute to future flood risk reduction and estimate that a large share of future flood risk may be reduced by implementing mangrove restoration. Our estimates indicate that nature-based solutions like mangrove restoration constitute promising complementary measures to other adaptation measures (e.g. structural measures). We further indicate that the benefits of mangrove restoration are unevenly distributed across the population in terms of poverty, and show that only looking into property damages and people exposed is not enough to understand the range of impacts of adaptation on population distributions. Even though this study can only be used as a first proxy analysis or indicative, it provides valuable insight into the feasibility of mangrove restoration at the global scale, and supports the need for sustainable adaptation and global assessmenst of Nature-based Solutions. Furthermore, implementing adaptation measures, such as mangrove restoration, in developing countries will contribute to the resilience of people in poverty, poverty alleviation and help tackle poverty traps.

How to cite: Tiggeloven, T., Mortensen, E., Worthington, T., de Moel, H., Spalding, M., and Ward, P.: Nature-based Solutions, mangrove restoration and global coastal flood risk reductions, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-369,, 2022.