The Value of Coastal Wetlands for Flood Damage Reduction in the Northeastern USA

The Value of Coastal Wetlands for Flood Damage Reduction in the Northeastern USA

Siddharth Narayan, Michael W. Beck, Paul Wilson, Christopher J. Thomas, Alexandra Guerrero, Christine C. Shepard, Borja G. Reguero, Guillermo Franco, Jane Carter Ingram & Dania Trespalacios 

Abstract

As exposure to coastal hazards increases there is growing interest in nature-based solutions for risk reduction. This study uses high-resolution flood and loss models to quantify the impacts of coastal wetlands in the northeastern USA on (i) regional flood damages by Hurricane Sandy and (ii) local annual flood losses in Barnegat Bay in Ocean County, New Jersey.

Using an extensive database of property exposure, the regional study shows that wetlands avoided $625 Million in direct flood damages during Hurricane Sandy. The local study combines these models with a database of synthetic storms in Ocean County and estimates a 16% average reduction in annual flood losses by salt marshes with higher reductions at lower elevations. Together, the studies quantify the risk reduction ecosystem services of marsh wetlands.

Measuring these benefits in collaboration with the risk modelling industry is crucial for assessing risk accurately and, where appropriate, aligning conservation and risk reduction goals.

Scientific Reports, volume 7, Article number: 9463 (2017)

Source: Nature

Taxonomy

• Watershed Management
• Disaster Prevention
• Disaster Risk Reduction
• Integrated Urban Water Management
• Watershed
• Flood Management
• Wetlands
• Constructed Wetlands
• Urban Water Infrastructure
• Flood management
• Flood damage
• Watershed Management
• Wetlands