A coastal village in the Philippines has demonstrated how nature based solutions can help tackle recurring floods, using locally available materials such as bamboo poles, discarded oyster shells and coconut husks instead of relying entirely on concrete structures. The innovative project in Pamarawan village, located in the City of Malolos in Bulacan province, has brought significant relief to residents who struggled with repeated flooding during monsoons and typhoons.
For years, strong waves and storm surges from North Manila Bay regularly flooded the low lying fishing village particularly during the southwest monsoon season. Even an existing concrete breakwater, standing 3–4 metres high, failed to prevent seawater from entering residential areas.
Bamboo Structures and Oyster Shells Create a Natural Coastal Barrier
The nature based coastal protection project uses interconnected bamboo structures spread across approximately 14 hectares of coastal waters. These bamboo cribs help reduce incoming wave energy while trapping mud and sand, gradually building up the seabed.
Discarded oyster shells placed inside coconut husk nets, known as cocomesh, further strengthen the coastal barrier and support the restoration of oyster reefs. The accumulated sediment is expected to create suitable conditions for planting mangroves, which can provide an additional natural defence against strong waves and storm surges.
The pilot project was approved in 2023, launched in 2024 and developed with technical support from Dutch engineering firm Haskoning. With an estimated investment of 130 million Philippine pesos (around $2 million), it is considered the country’s first nature based coastal protection initiative of its kind.
Residents Report Nearly Two Years Without Flooding
The project has already brought encouraging results for the village. Local officials reported that Pamarawan had remained free from flooding for almost two years, despite heavy rainfall and strong monsoon conditions.
In August 2026 several neighbouring communities in Bulacan experienced severe flooding that reportedly killed 15 people and forced the provincial government to declare a state of calamity. However, Pamarawan largely escaped the devastation.
Residents also observed that sediment had accumulated to approximately 0.3 metres in certain areas, bringing the project closer to its goal of supporting mangrove plantation. Once established, mangroves could act as natural barriers against waves while providing habitats for marine species.
Project Supports Marine Life and Local Livelihoods
Beyond flood protection, the initiative is also bringing environmental benefits. Residents have noticed an increase in marine life, including shrimps crabs and oysters, around the bamboo structures. The structures have also helped prevent floating waste from reaching the village shoreline.
Around 80–90% of the construction workforce was reportedly recruited locally, creating employment opportunities for residents. Fishermen affected by the project were also given priority for construction related jobs.
However, the initiative initially faced opposition from some community members. More than 50 residents reportedly lost income after their traditional fish traps and oyster farms were affected by the construction. Local officials acknowledged these concerns and said employment opportunities were provided to some affected fishermen.
Philippines Considers Expanding Nature Based Flood Protection
The success of the Pamarawan initiative has attracted attention from government officials, who see potential for similar projects in other flood prone coastal communities.
The Philippines has traditionally depended on concrete seawalls, dikes and drainage systems to control flooding. However, concerns over construction quality, rising costs and the limitations of conventional infrastructure have encouraged authorities to explore more sustainable alternatives.
In September 2026, the Department of Public Works and Highways praised the Pamarawan project and indicated that its approach could be adapted in other vulnerable areas across Bulacan and neighbouring Pampanga province.
The Philippines has also taken steps to strengthen its national approach to nature based solutions placing ecosystem restoration at the centre of climate resilience and disaster risk reduction efforts.
Experts, however, caution that the Pamarawan model cannot simply be copied everywhere. Each coastline has different environmental, geographical and social conditions meaning flood protection projects must be designed according to local needs.
The initiative highlights how combining engineering with natural ecosystems can offer communities a more sustainable way to tackle flooding while protecting biodiversity and supporting local livelihoods.