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Ecosystem-based adaptation to cope with sea-level rise and extreme climatic events

Uruguay Kiyú, San José, on Uruguayan coast of the Rio de la Plata river estuary

Ecosystem-based adaptation (EbA) strategies were implemented near Kiyú on the Uruguayan coast to mitigate the effects of sea-level rise, storm surges, strong winds and sand dune erosion.

Nature-based Intervention:

In a coastal area of Uruguay, regeneration of sand dunes and revegetation with native plants was carried out to aid in the recovery of the coastal ecosystem. To make conditions more favorable to the native sand dune grasses and shrubs, large planted Eucalyptus trees were cut down, a strategy which has been shown be beneficial to the maintenance of sand bluffs. A low-tech, low-cost sand captor fence made out of tree branches was also installed to protect the bluff and support the recovery of the dune system. The regrowth of native vegetation reportedly helped reduce erosion and increase natural drainage, building resilience to flooding in storms.

Overview of context and outcomes:

According to a study, the initiative was implemented in a participatory way, involving the local community and institutional stakeholders, and prioritized the capacity building of municipal and local government actors in EbA and Integrated Coastal Management (ICM). A Vulnerability Reduction Assessment (VRA), an important tool used by the United Nations Development Program (UNDP) for their community-based adaptation programmes, was conducted post-implementation and revealed that participants perceived themselves to have lower vulnerability and higher adaptive capacity after the implementation of the program. The study reported an increase in the resilience of the social-ecological system, encompassing both the ecosystem and human components. A systematic monitoring and evaluation strategy was also put into place as part of the program.

Case effectiveness on

Climate change

Mitigation: Not reported
Adaptation: Positive

Successful recovery of the sand dunes was reported through the study, as well as higher resilience of the ecosystem to storms.

Ecosystem health

Ecological effect: Not reported

Native vegetation was replanted instead of exotic trees, reportedly helping to regenerate the sand dune ecosystem closer to its natural state. A nursery of native plants was also established to support the sustainable continuous revegetation of the dune system.

Socioeconomic outcomes

The project played a large role in empowering local communities to have an active role in deciding coastal defense strategies and helped facilitate knowledge exchange within the target region.

Governance

The governance of this project centers around local stakeholders, including community members and local governments, as well as subnational governments, who were all reportedly actively involved in the implementation of this EbA strategy. The initiative engaged in capacity building and a socio-institutional learning process, where the EbA approach was mainstreamed into government activities and budget and adaptive governance was encouraged. The vulnerability reduction assessment provided a space for participation, feedback and future adaptation planning.

Finance

The project was funded by a combination of local and subnational governments interested in investing in habitat restoration and coastal defense.

Monitoring and evaluation

The vulnerability reduction assessment (VRA) acts at the main monitoring tool to evaluate changes in the success of the project. VRA workshops were conducted with local stakeholders in order to gather their perspectives on perceived risk and local vulnerabilities. The baseline workshop occurred in 2011, with at least two more taking place by 2018. This allows researchers to track changes in perception alongside their interventions.

Trade-offs and limitations

This project is ongoing with further interventions such as infrastructure realignment needed to achieve further success.

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Close up plant in sand
Photo © Jeremy Bishop

Intervention type

  • Restoration
Conducted at landscape scale

Ecosystem type

  • Coastal

Climate change impacts addressed

  • Coastal erosion
  • Coastal inundation
  • Storm surge

Instigators

  • Community/self driven
  • State/district/local government agency
  • Local NGO or CBO (eg. indigenous)
  • National government/agency

Societal challenges

  • Climate change adaptation
  • Disaster risk reduction

Outcomes

Resources

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Literature info

  • Peer reviewed
Case methodolgy reported