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Lidar-derived digital elevation models often contain a vertical bias due to vegetation. In areas with tidal influence the amount of bias can be ecologically significant, for example, by decreasing the expected inundation frequency. We generated a corrected digital elevation model (DEM) for wetlands throughout Collier county using a modification of the Lidar Elevation Adjustment with NDVI (LEAN) technique (Buffington et al. 2016). GPS survey data (15,223 points), NAIP-derived Normalized Difference Vegetation Index (2010), a 10 m lidar DEM from 2007, and a 10 m canopy surface model were used to generate a model of predicted bias across marsh, mangrove, and cypress habitats. The predicted bias was then subtracted from...
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Hurricane Harvey made landfall near Rockport, Texas on August 25 as a category 4 hurricane with wind gusts exceeding 150 miles per hour. As Harvey moved inland the forward motion of the storm slowed down and produced tremendous rainfall amounts to southeastern Texas and southwestern Louisiana. Historic flooding occurred in Texas and Louisiana as a result of the widespread, heavy rainfall over an 8-day period in Louisiana in August and September 2017. Following the storm event, U.S. Geological Survey (USGS) hydrographers recovered and documented 2,123 high-water marks in Texas, noting location and height of the water above land surface. Many of these high-water marks were used to create flood-inundation maps for...
    map background search result map search result map USGS 1:31680-scale Quadrangle for Cypress, TX 1918 USGS 1:31680-scale Quadrangle for Cypress, TX 1918 USGS 1:24000-scale Quadrangle for Cypress, IL 1966 USGS 1:24000-scale Quadrangle for Cypress, FL 1994 USGS 1:24000-scale Quadrangle for Cypress, FL 1952 USGS 1:24000-scale Quadrangle for Cypress, FL 1982 USGS 1:31680-scale Quadrangle for Cypress, LA 1937 USGS 1:24000-scale Quadrangle for Cypress, TX 1915 USGS 1:24000-scale Quadrangle for Cypress, TX 1970 USGS 1:24000-scale Quadrangle for Cypress, TX 1970 USGS 1:24000-scale Quadrangle for Cypress, TX 1970 USGS 1:24000-scale Quadrangle for Cypress, TX 1995 USGS 1:24000-scale Quadrangle for Cypress, TX 1915 USGS 1:24000-scale Quadrangle for Cypress, TX 1915 San Jacinto River LEAN-Corrected Collier County DEM for wetlands USGS 1:31680-scale Quadrangle for Cypress, TX 1918 USGS 1:31680-scale Quadrangle for Cypress, TX 1918 USGS 1:24000-scale Quadrangle for Cypress, IL 1966 USGS 1:24000-scale Quadrangle for Cypress, FL 1994 USGS 1:24000-scale Quadrangle for Cypress, FL 1952 USGS 1:24000-scale Quadrangle for Cypress, FL 1982 USGS 1:31680-scale Quadrangle for Cypress, LA 1937 USGS 1:24000-scale Quadrangle for Cypress, TX 1915 USGS 1:24000-scale Quadrangle for Cypress, TX 1970 USGS 1:24000-scale Quadrangle for Cypress, TX 1970 USGS 1:24000-scale Quadrangle for Cypress, TX 1970 USGS 1:24000-scale Quadrangle for Cypress, TX 1995 USGS 1:24000-scale Quadrangle for Cypress, TX 1915 USGS 1:24000-scale Quadrangle for Cypress, TX 1915 San Jacinto River LEAN-Corrected Collier County DEM for wetlands