Valuing the Flood Risk Reduction Benefits of Florida’s Mangroves

Last modified: 
November 5, 2019 - 11:30am
Type: Report
Year of publication: 2019
Date published: 10/2019
Authors: Siddharth Narayan, Christopher Thomas, Joss Matthewman, Christine Shepard, Laura Geselbracht, Kechi Nzerem, Michael Beck
Publishing institution: UC Santa Cruz and the Nature Conservancy

In a nutshell,

  • We used an insurance industry catastrophe model from RMS to quantify the flood reduction benefits of mangroves across Florida
  • Annually, across multiple storms, mangroves reduce flood damages by 25.5% to properties behind them in Collier County
  • During Hurricane Irma, over 626,000 people living behind mangrove forests saw reduced flooding in census tracts across Florida
  • During Hurricane Irma, mangroves averted $1.5 billion in surge-related flood damages to properties; which represents a 25% savings in counties with mangroves
  • Every hectare of mangroves with properties behind them provided, on average, $7,500 in risk reduction benefits during Hurricane Irma
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