In 2005, Hurricane Katrina made landfall near the Louisiana-Mississippi state border, causing massive devastation and forcing 400,000 people to evacuate (Chuang et al. These results enhance understanding of cost-effectiveness of federal elevation mitigation investments, benefits of elevating homes above the minimum requirements, and most effective elevated heights for homes. This elevation generates a BCR of 1.5 and 1.7 over a 30-year mortgage and a 70-year building lifetime, respectively, if the benefit is allocated proportionately. The analysis reveals that elevating existing homes by either 3 feet above the ground or to the base flood elevation (BFE 100-year flood elevation), whichever is higher, reduces the median AAL by 98%. Then, we determine optimal first-floor height (FFH) by foundation type and 100-year flood depth. We compute benefit–cost ratio (BCR) and net benefit–cost ratio (NBCR) of the elevation mitigation investment across multiple time horizons, considering several funding scenarios. We use multiple return period flood depths from FEMA RiskMAP non-regulatory flood depth and calculate flood risk reduction as the difference between pre- and post-elevation AAL. This research evaluates the cost-effectiveness of the Road Home Program elevation mitigation assistance for a case study of homes in Jefferson Parish, Louisiana, using benefit–cost analysis (BCA) based on average annual loss (AAL) prediction. © 2020 FloodMap.After Hurricanes Katrina and Rita in 2005, the State of Louisiana received federal Community Development Block Grant Disaster Recovery (CDBG-DR) assistance, administered by the Louisiana Office of Community Development (OCD) as the Road Home Program, to provide homeowners with the required matching funds for elevating damaged homes under the Federal Emergency Management Agency (FEMA) Hazard Mitigation Grant Program (HMGP).
#JEFFERSON PARISH FLOOD MAP FREE#
Notes:Before using this Flood Map application, please note that for various technical or non technical reasons the application is not guaranteed free of bugs or inaccuracies. Negative elevation means depth below sea level.ĭata Sources: Mazpzen, TNM, SRTM, GMTED, ETOPO1 The elevation layered on the map is in meters and is from sea level. By setting negative elevation, Bathymetry study is also possible.We also think that it can help in planning irrigation system and water management.It can help to perform elevation analysis of an area for any purpose like city/town planning, new construction etc.Global Warmin and Sea Levele Rise are the effects of Climate Change.Effect of sea level rise or sea level change can be seen on the map.It can also provide floodplain map and floodline map for streams and rivers.New Iberia, US Flood Map can help to locate places at higher levels to escape from floods or in flood rescue/flood relief operation.New Iberia, US Flood Map may help to provide flood alert/flood warning if flood water level at certain point is rising.New Iberia, US Flood Map may be useful to some extent for flood risk assessment or in flood management, flood control etc.
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