World Bank Voices
Syndicate content

Mangroves

The miracle of mangroves for coastal protection in numbers

Michael W. Beck's picture
Also available in: Español | العربية | Français
© Ursula Meissner/The Nature Conservancy
© Ursula Meissner/The Nature Conservancy

The North Atlantic hurricane season officially opens June 1, and there are predictions that storms this year could be worse than average again. That would be bad since last year was the costliest year on record for coastal storms. Communities and countries across the Caribbean and SE USA were particularly hard hit. The need for resilient solutions to reduce these risks is paramount.

There has been growing though largely anecdotal evidence that mangroves and other coastal habitats can play important roles in defending coastlines. Nonetheless it has been difficult to convince most governments and businesses (e.g., insurance, hotels) to invest in these natural defenses in the absence of rigorous valuations of these benefits.

So in 2016 The Nature Conservancy teamed with the World Bank and scientists from the public, private and academic sectors to identify how to rigorously value the flood protection benefits from coastal habitats. In short, we recommended that we value this ecosystem service by adopting tools and from the engineering, risk and insurance sectors and following an Expected Damage Function (EDF) approach. This approach assesses the difference in flooding and flood damages with and without coastal habitats such as mangroves across the entire storm frequency distribution (e.g., 1-in-10, -25 and -100 year storms).