The cost of seawalls runs into billions and their repair is required constantly. Mangroves in comparison do the same task free of cost. Mangroves flood protection, These salt tolerant coastal trees absorb the force of storms and floods.
How do mangroves help protect coasts?
Studies have revealed that mangroves can reduce wave energy up to around 66% in the 100 meters zone of mangroves. They protect inland from storm surge and hold sediments in place against the eroding coastline.
Figures and statistics
- $65 billion: Avoided losses every year according to one global study
- 15 million: Number of people protected from flooding every year
- Asia: In countries like Vietnam, India and Bangladesh, more people are protected than elsewhere
- Underdeveloped countries: For example; Belize, Suriname, and Mozambique have the benefit of mangrove flood protection which is more than 15 percent of GDP of these countries.
- Severe storms: During a once in 100 years storm mangroves prevent loss of $270 billion and protect 37 million people.
Reasons to Protect Them – mangroves flood protection
Seawalls require constant restoration. According to the authors of the study, mangroves must be viewed as national assets and financed like other forms of coastal protection. Preservation alongside coral reefs increases the level of protection. In India, mangroves like the Sundarbans offer protection to inhabitants in densely populated coastal areas when cyclones strike.
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