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Probabilistic 100-year floodplain maps for data-scarce regions

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Created: Mar 31, 2018 at 10:46 p.m.
Last updated: Apr 08, 2018 at 10:22 p.m.
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The 100-year floodplain maps generated by Flood Emergency Management Agency (FEMA) are not available for many watersheds in the United States (Data-scare regions). A collection of probabilistic 100-year floodplain maps for 17 watersheds (HUC12) in these data-scare regions is presented here. These maps are the results of a new geomorphic model which uses open source data, such as DEM, climate and temperature rasters (Jafarzadegan et al., 2018). The floodplain maps are raster files in TIFF format with spatial resolution of 30 meters. The geographic and projected coordinate system used for these maps are GCS North American 1983 and NAD 1983 UTM respectively. The value of each cell ranges between 0-1 which presents the probability of getting inundated by a 100-year flood event. The maps are available from the following HUC units: 150602030605, 110200020704, 140500050108, 031102010505, 051401040706, 030501060305, 140600080205, 020802040501, 170200160505, 140401040110, 101401021103, 170602080412, 170900050604, 180400080803, 101302010107, 101302010108, 170200160408.

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Related Resources

This resource is referenced by Jafarzadegan, K., Merwade, V., Saksena, S., 2018. A Geomorphic Approach to 100-Year Floodplain Mapping for the Conterminous United States. J. Hydrol.
The content of this resource is derived from USGS 30m horizontal resolution National Elevation Dataset (NED), USGS’s National Hydrography Dataset (NHD), FEMA Flood Insurance Rate Maps (FIRMs), National Land Cover Database (NLCD) 2011, WorldClim-Global Climate Data

How to Cite

Jafarzadegan, K., V. Merwade (2018). Probabilistic 100-year floodplain maps for data-scarce regions, HydroShare,

This resource is shared under the Creative Commons Attribution CC BY.


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