SWMM-CAT

SWMM-CAT (Climate Adjustment Tool) answers the question every long-lived drainage design now faces: what do climate projections do to my model inputs? It serves location-specific adjustment factors derived from downscaled CMIP climate scenarios — monthly rainfall multipliers, evaporation changes and modified extreme-event distributions — formatted for direct use in SWMM's climate adjustment panel.

It is deliberately simple: not a downscaling framework, but a defensible, citable bridge between the climate literature and a working SWMM model. For screening how near-term and end-of-century scenarios shift flooding and overflow performance, it is the lowest-friction option going.