This dataset contains high-resolution flood inundation maps of past storm events to support planners and the impacted community. These maps are generated with approximate GIS-based methods and should not be considered definitive. This project was originally shared on https://www.designsafe-ci.org/.
The contents of this data package include three (3) 3x3-meter resolution GeoTIFF rasters of riverine flood inundation for three storm events in Southeast Texas: Ike, Harvey, and Imelda. Rasters are saved in BigTIFF format and range from 3-9 GB in size.
Details on riverine flood inundation mapping method:
Associated GitHub repo: https://github.com/markwang0/HAND_SETX/ This project contains three 3x3-meter resolution GeoTIFFs of riverine flood inundation for Hurricane Ike, Hurricane Harvey and Tropical Storm Imelda. Riverine (fluvial) flood inundation was generated with the Height Above Nearest Drainage (HAND) method and flowrates from the National Water Model (NWM). Maximum flowrates from the NWM during each storm event were converted to flood stage with synthetic rating curves, and the flood stage was converted to spatial inundation. The rasters cover the Southeast Texas Counties of Newton, Jasper, Hardin, Orange and Jefferson. Units are meters of inundation above surface elevation. The spatial reference is EPSG:5070. Please note that only riverine (fluvial) flooding is shown on each raster. Pluvial flooding and storm surge are neglected.
Liu, Yan, David Maidment, Andy Carter, Paola Passalacqua, and Tim Whiteaker. "Height Above Nearest Drainage (HAND) at Three-Meter Resolution for the State of Texas." United States: N. p., 2023. Web. doi:10.13139/ORNLNCCS/2204010. https://cfim.ornl.gov/data/
Zheng, X., Maidment, D. R., Tarboton, D. G., Liu, Y. Y., and Passalacqua, P. (2018). GeoFlood: Large-scale flood inundation mapping based on high-resolution terrain analysis. Water Resources Research, 54:10,013–10,033. https://doi.org/10.1029/2018WR023457
