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EnviroAtlas - 2019 Floodplain Land Cover Proportions for the Conterminous United States

Published by U.S. EPA Office of Research and Development (ORD) - Center for Public Health and Environmental Assessment (CPHEA) | U.S. Environmental Protection Agency | Metadata Last Checked: January 27, 2026 | Last Modified: 2022-07-13T00:00:00.000+00:00
This EnviroAtlas dataset represents the percentage of land area in estimated floodplains that is classified as natural, forest, shrubland, wetland, developed, low intensity developed, medium intensity developed, high intensity developed, agriculture, pasture, cropland, and rangeland land cover for each 12-digit hydrologic unit code (HUC) in the conterminous United States. Land cover is defined using the 2019 National Land Cover Dataset (NLCD). Floodplains were defined using the EnviroAtlas FEMA_RF_Blend dataset dated 3/25/2019. This dataset was produced the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

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