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Philippines uses mangrove buffer zones to protect its coasts

Negros Occidental is the first to introduce a coastal greenbelt

Natural protection against storms, flooding and erosion

The Senate is currently considering a bill to create a national coastal greenbelt.

By Mariejo Ramos

Local leaders, instead of relying on man-made barriers, have re-established natural barriers, such as 100-metre wide strips of vegetation. These include coastal mangroves, beach forest species, and other plants that can protect against storms and erosion.

Negros Occidental started establishing its "coastal Greenbelt" in 2022. It was the first network of its kind to be established in the Philippines.

The project led to the creation and protection of over 1,000 hectares in Negros Occidental of mangroves and beach forests, as well as wetlands, which serve now to protect against typhoons and coastal erosion, and to reduce the risk of disasters.

Negros Occidental's coastal greenbelt can serve as a model to protect the thousands of kilometers of coastline in Indonesia, which is threatened by deforestation, urbanization and climate change.

Gloria Estenzo Ramos Vice President of Oceana Philippines, a group dedicated to ocean conservation, said: "Local governments are aware of the benefits that coastal greenbelts can provide in saving lives and property from destruction."

According to her organization, more than 90 local governments have passed policies or ordinances designating certain areas of their area as greenbelt zone.

Negros Occidental also contains the 89,000-hectare Negros Occidental Coastal Wetlands conservation area, which is home to several endangered species such as turtles and Dolphins. This wetland was declared of international importance by 2016

According to a study conducted by British scientists in 2012, a 100-metre mangrove strip can reduce waves' energy by as much as 66%.

Wetland experts have been pushing for similar measures nationwide, and legislators have introduced legislation to create national coastal greenbelts zones. 60% of Filipinos live in coastal areas that are vulnerable to climate catastrophes.

The Philippines House of Representatives passed a coastal-management bill unanimously in 2023, which would require coastal towns across the country to establish 100-m greenbelts similar to Negros Occidental.

The bill has yet to be approved by the Senate, as it was not deemed a priority.

THREATS TO COASTAL Ecosystems

According to Wetlands International Philippines, coastal ecosystems such as mangroves, seagrasses and corals are beneficial for both rural and urban Filipinos.

These coastal protections have been under threat for many decades.

In the 1990s, nearly half of the 450,000 hectares (or 1.2 million acres) of mangroves in Philippines were gone. Kisha Murana, Wetlands International Philippines' policy and advocacy officer, stated that mangroves were cut down because of "destructive coastal projects like reclamation".

Muana said that the bill will help the government to monitor the greenbelts and identify areas where they could be restored.

She said that there are some areas of the Philippines where mangroves do not cover the required 100 metres to block wave energy. The law could force these territories to add beach forests to make up the difference.

Julie Ann Bedrio is the provincial environmental officer for Negros Occidental. She said that proposed developments such as land reclamation projects and wind power had a greater impact on coastal areas than individual vegetation cutting.

Bedrio also said that coastal areas had suffered from a lack of enforcement of coastal laws, as well as pollution caused by marine litter. This includes plastics wrapped around mangrove stems or trunks.

Bedrio added that the establishment of a greenbelt zone network in Negros Occidental helped to encourage dialogue between local leaders, NGOs, and environmental experts, so they could monitor and, if necessary, block projects which might harm coastal environments.

First Line of Defence

Greenbelts were recognized by the International Union for Conservation of Nature (a conservation group) as an important solution to some coastal problems including wind and sea erosion as early as 2007.

The proposed policy in the Philippines would require the creation of coastal greenbelts that are based on the vulnerability to storms surges, tsunamis, and other threats. It would also create a plan for protecting coastal biodiversity.

Oceana's Ramos, who is a member of Oceana, said that she believes the bill will be passed quickly as soon as the Senate resumes its session in June. Oceana has been invited to join the technical working group which will examine the current version.

Bedrio stated that local governments are using limited funds to implement policies for coastal greenbelts. It would be helpful if they were supported by the national government with financial or technical support.

The environmental officer is still haunted by thousands of deaths caused by Yolanda or Haiyan in 2013. He hopes that coastal greenbelts become a legislative priority.

(source: Reuters)