Repetitive Flood Loss Area Analysis of New Orleans
In 2005, Katrina flooded a large portion of New Orleans, which demonstrated the high flood risk within the city. Beyond hurricane-related flooding, everyday storms have shown that many local residents are victims of repetitive flood loss due to stormwater runoff. Repetitive flood loss has cost +$837 million in damage payments since 1978. A better understanding of repetitive flood loss throughout New Orleans is needed in order to assist in the development of best planning practices for the reduction of flood risk. In partnership with the City of New Orleans and the Department of Housing and Urban Development, the University of New Orleans - Center for Hazards Assessment, Response & Technology (CHART) has conducted repetitive loss area analyses (RLAA) by enumerating FEMA flooding data and gray/green infrastructure data to create ArcGIS maps overlay to analyze flood vulnerability. Additionally, CHART uses ArcGIS Photo Survey to collected mitigation data on +140,000 properties within the city. The goal of this GIS analysis is to help residents reduce their flood risk by providing a broader understanding of the flooding problems in their neighborhood, and the potential flood reduction solutions. The results of this analysis will inform mitigation planning and prioritization of mitigation projects, as well as provide education and outreach efforts focused on flood mitigation.