Authors

• Mahshid Ghanbari – Colorado State University
• Mazdak Arabi – Colorado State University
• Jayantha Obeysekera – Florida International University
• William Sweet – NOAA

Purpose

 Flood frequency amplification would exacerbate inundation impacts over time and cause a considerable increase in the risk to properties. These data provide future minor and major flood frequency under 3 for 68 tide stations across coastal U.S. under 3 sea level rise scenarios, which can be used for planning and design of effective coastal flooding mitigations.

Description

 A nonstationary Mixture Normal-GPD probability distribution was used to estimate future frequency of minor and major coastal flooding frequency over a range of SLR levels. The model parameters were estimated for 68 tidal monitoring stations along the coastal continental U.S. (CONUS) using the hourly observed water level data, which are available from the National Oceanic and Atmospheric Association (http://tidesandcurrents.noaa.gov/). A maximum daily water level that exceeds the minor and major flooding threshold was considered as minor and major flooding event respectively.

Attributes

Future return period of major coastal flooding [Year]
Expected annual frequency of minor coastal flooding [Day]