Height Above Nearest Drainage (HAND) derived Flood Inundation Maps of Southeast Texas

This purpose of this project is to share 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 flood inundation for three (3) different storm events in Southeast Texas (Ike, Harvey & Imelda). These rasters are saved in BigTIFF format and range from 3-9 GB in size. They can be accessed with any geographic information system (GIS). Riverine flood inundation simulation: Please see the associated GitHub repo: https://github.com/markwang0/HAND_SETX/ This project contains three (3) 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. The units are meters of inundation above the surface. The projected coordinate reference system EPSG:5070 is used. Please note that only riverine (fluvial) flooding is shown on each raster. Pluvial flooding and storm surge are neglected.