Multi-Model Flood Mapping for Continental-Scale Forecasting Frameworks

During the first two years of the project, FHS completed extensive tool development, documentation, and testing across river-scale and basin-scale applications. This included building and validating workflows that connect ensemble streamflow forecasts to multiple flood inundation models, comparing model accuracy and computational performance against observed flood events, and producing basin-wide flood maps for the Yellowstone River Basin using both historical and forecast conditions. The project demonstrates how multi-model flood mapping can quantify uncertainty, improve situational awareness, and support both military and civil decision-making for flood response, mobility analysis, and hazard assessment. Ongoing work extends these methods to additional large basins and international test cases, with results documented through open-source code, technical reports, and peer-reviewed publications.