Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Informing Policy Choices with Regional Estimates of Flood Risk across the United States
With growing fiscal pressures at the Federal level and ongoing discussions about the role of the Federal government in flood management, there is a need to better understand how flood risk and resilience vary across the United States. This paper describes a national flood risk characterization tool (NFRCT) developed for the U.S. Army Corps of Engineers (USACE). The NFRCT relies on data from the Federal Emergency Management Agency (FEMA), the U.S. Census, the U.S. Geological Survey (USGS), the USACE, and other sources. FEMA’s mapping of 1% annual chance exceedance (ACE) flood zones is used with the USGS National Elevation Dataset to estimate a distribution of flood depths for each flood zone. Flood zones are then overlaid with census blocks to estimate population and building exposure. Exposure is assumed to be proportional to the areal overlap of census blocks and floodzones, with the population coming from census data and the building inventory coming from FEMA’s HAZUS. Finally, damages are estimated for exposed buildings using standard depth-damage functions from FEMA and USACE. Exposure and damage estimates are summed to counties and hydrologic unit code-8 watersheds for comparing risk across different areas of the United States.
Informing Policy Choices with Regional Estimates of Flood Risk across the United States
With growing fiscal pressures at the Federal level and ongoing discussions about the role of the Federal government in flood management, there is a need to better understand how flood risk and resilience vary across the United States. This paper describes a national flood risk characterization tool (NFRCT) developed for the U.S. Army Corps of Engineers (USACE). The NFRCT relies on data from the Federal Emergency Management Agency (FEMA), the U.S. Census, the U.S. Geological Survey (USGS), the USACE, and other sources. FEMA’s mapping of 1% annual chance exceedance (ACE) flood zones is used with the USGS National Elevation Dataset to estimate a distribution of flood depths for each flood zone. Flood zones are then overlaid with census blocks to estimate population and building exposure. Exposure is assumed to be proportional to the areal overlap of census blocks and floodzones, with the population coming from census data and the building inventory coming from FEMA’s HAZUS. Finally, damages are estimated for exposed buildings using standard depth-damage functions from FEMA and USACE. Exposure and damage estimates are summed to counties and hydrologic unit code-8 watersheds for comparing risk across different areas of the United States.
Informing Policy Choices with Regional Estimates of Flood Risk across the United States
Lorie, Mark (Autor:in) / Stedge, Jerry (Autor:in) / Firlie, Brad (Autor:in) / Zheng, Pearl (Autor:in) / Jensen, Jeff (Autor:in)
World Environmental and Water Resources Congress 2018 ; 2018 ; Minneapolis, Minnesota
31.05.2018
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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