Case Study

Green-Grey Infrastructure In Concepción, Philippines


Case Study Summary In Bagongon island, the Green-Gray Community of Practice has focused on three key objectives:

  • Rebuild coastal sediment by replanting mangroves;
  • Halt the ongoing beach erosion, and;
  • Reduce the effects of extreme weather events on residents living in the Bagongon cove.
Key Topics
  • Coastal resilience
  • Community engagement
  • Supporting livelihoods
  • Capacity building
  • Nature-based solution
  • Biodiversity
  • Green-grey infrastructure
Project Owner Bagongon Fisherfolk Association
Project Start/Completion 2015 – 2021
Location Bagongon, Concepción, Iloilo, Philippines
Community Impacted Rural, Coastal
Vulnerable Groups Impacted Coastal communities, fishing communities
Climate Hazards Mitigated Flooding
Case Study Provided by Conservation International

In Bagongon island, the Green-Gray Community of Practice has focused on three key objectives:

  • Rebuild coastal sediment by replanting mangroves;
  • Halt the ongoing beach erosion, and;
  • Reduce the effects of extreme weather events on residents living in the Bagongon

About the Project

Because of mangrove deforestation, an approximately 200m width of coastline in Bagongon eroded. Most of the population (489 households) is densely concentrated in a cove, where the storm surge and wind wave potential are high. The green-grey project includes mangrove planting within sediments accumulated behind sediment-trapping fences and new rock breakwaters for wave attenuation. The goal of the sediment-trapping fences and wave attenuation structures is to promote beach growth where mangrove seedlings can be planted. The wave attenuation structures at Bagongon were placed on the ‘surf side’ of the sediment trapping fences to reduce the effects of wind waves and storm surge on the communities until the mangrove rehabilitation occurred. Construction materials were locally sourced and included bamboo poles, bamboo mats, coconut coir mats, twine, sand, and rock. Once the restored mangrove ecosystem is established, the sediment trap and wave attenuation structure materials can be reused in other locations to support similar beach growth and mangrove rehabilitation efforts. Off- shore, marine protected areas conserve coral reef ecosystems, that provide additional risk reduction benefits. The community was engaged throughout the design development process and members of the Fisherfolk Association were hired to construct the project features.

Achieved Outcomes

So far, a total of 110,363 seedlings of native species have been planted covering an area of 11 hectares of mangrove rehabilitation and establishing a 769.7 hectare community-based marine protected area (CB- MPA), which included capacity building and training. The mangrove and coral reef restoration aids with flood regulation and protection from storm surge.

The community has been directly engaged in the restoration and implementation of the project. As part of the effort to incentivise community participation, two livelihood projects were included: the production of coconut-based products and the production of virgin coconut oil (VCO) as liniment and ointment. This supports the community which is heavily reliant on fishing to diversify their income, and increases resilience during typhoons, monsoons and other extreme weather events that affect fishing.

The project also supported the community in establishing a Barangay Emergency Response Center and emergency response plans.

The project goal was to increase the resilience and security of small island communities and ecosystems to climate change and disaster risk by:

  • Increasing environmental and community capacity to avoid and/or withstand impacts of extreme events like typhoons
  • Reducing fatalities and damage to livelihoods and structures during extreme climate-related events and disasters
  • Reducing dependence on relief and development programmes from the government, NGOs, humanitarian groups and official development assistance from other countries
  • Restoring important natural resources and elements of the unique biodiversity of the Philippines to bolster food security
  • Diversifying livelihood activities to bolster profitability and sustainability of the long-term economic development of partner communities (e.g. increased income, better access to social services such as health and education, improved wellbeing)
  • Integrating green-grey engineering concepts and related-strategies into planning, implementation and evaluation processes from the local to national level, leading to relevant policies, national priorities, and gaining broad-scale support from the national government agencies (e.g. faster processing of requests, financial and technical assistance) in the process
  • Scaling up green-grey approaches across the Philippines and other countries made possible as the project provides effective examples of a demonstrable and replicable strategy for climate change resilience, integrating green approaches with traditional engineering to increase resilience in a highly vulnerable key biodiversity area in a developing country where there are very limited

We did not have an appropriate system [Emergency Response Plan] like this before, as we were not actively engaged as a community, but we were able to achieve this now through the participation of our members and community (…) Now we believe we are more prepared to face the challenges of Climate change.
Vivian Amasan, Community Leader, Bagongon Fisherfolks Association

Number of vulnerable people made more resilience by this project


Find out more

Read more case studies...

Filter by