Map-First Climate-Informed Flood Assessment for Data-Scarce Basins R package floodflow version 0.1.1 A reproducible, map-oriented workflow for flood hazard assessment that chains rainfall extreme value analysis, rainfall-runoff simulation, terrain-based flow routing and water-depth estimation into a single pipeline. A stationary-versus-nonstationary test for changing rainfall extremes is built in, and any flood scenario can be produced for a present-day or a climate-adjusted design event. Defaults target settings with sparse gauge networks, using satellite or reanalysis rainfall, temperature-based potential evapotranspiration and regional pooling of short records. Heavy modelling engines are wrapped rather than reimplemented so that the core stays lightweight. Methods follow established hydrology, including the generalized extreme value distribution for rainfall maxima (Coles, 2001, <doi:10.1007/978-1-4471-3675-0>) and Manning's equation for open-channel flow. Software Depends: R (>= 4.1) Imports: stats Suggests: terra, sf, extRemes, airGR, whitebox, tmap, leaflet, leafsync, ranger, lmomRFA, shiny, testthat (>= 3.0.0), knitr, rmarkdown George Owusu <owusugeorge@ug.edu.gh> Comprehensive R Archive Network (CRAN) George Owusu [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=floodflow/LICENSE) 2026-07-29 application/tgz https://CRAN.R-project.org/package=floodflow doi:10.32614/CRAN.package.floodflow