The Global Flood Protection Benefits of Mangroves

被引:270
作者
Menendez, Pelayo [1 ,2 ]
Losada, Inigo J. [1 ]
Torres-Ortega, Saul [1 ]
Narayan, Siddharth [2 ,4 ]
Beck, Michael W. [2 ,3 ]
机构
[1] Univ Cantabria, IHCantabria Inst Hidraul Ambiental, Santander 39011, Spain
[2] Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95062 USA
[3] Nature Conservancy, Santa Cruz, CA 95062 USA
[4] East Carolina Univ, Dept Coastal Studies, 850-NC 345, Wanchese, NC 27959 USA
关键词
ECOSYSTEM SERVICES; SEA-LEVEL; COASTAL PROTECTION; CLIMATE-CHANGE; REANALYSIS; VALUATION; EXPOSURE; FORESTS; FUTURE; SCALE;
D O I
10.1038/s41598-020-61136-6
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Coastal flood risks are rising rapidly. We provide high resolution estimates of the economic value of mangroves forests for flood risk reduction every 20 km worldwide. We develop a probabilistic, process-based valuation of the effects of mangroves on averting damages to people and property. We couple spatially-explicit 2-D hydrodynamic analyses with economic models, and find that mangroves provide flood protection benefits exceeding $US 65 billion per year. If mangroves were lost, 15 million more people would be flooded annually across the world. Some of the nations that receive the greatest economic benefits include the USA, China, India and Mexico. Vietnam, India and Bangladesh receive the greatest benefits in terms of people protected. Many (>45) 20-km coastal stretches particularly those near cities receive more than $US 250 million annually in flood protection benefits from mangroves. These results demonstrate the value of mangroves as natural coastal defenses at global, national and local scales, which can inform incentives for mangrove conservation and restoration in development, climate adaptation, disaster risk reduction and insurance.
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页数:11
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