SOL40: Forty Years of Simulations under Climate and Land Use Change

Nowadays, a major issue is land-use change by urban development that alters the catchment response to meteorological events. Urban basins have less storage capacity and more rapid runoff, so rivers rise quickly during storms higher peak discharge rates than rural catchments. An exemplary case of this situation city Milan (northern Italy) its whole territory extends towards north collecting meteoric precipitation through Seveso, Olona Lambro (SOL) rivers. To assess impact anthropogenic on scale hydrology, reanalysis 40 years simulations was carried out with Curve Number (CN) map based current land use compared using CN maps past use. A coupled hydro-meteorological system built combined physically rainfall-runoff hydrological model FEST-WB, developed Politecnico di Milano, ERA5-Land hourly dataset for period 1981 2020, provided ECMWF under framework Copernicus Climate Change Service Programme. The study (named SOL40) analyses year trends in main (air temperature, precipitation) variables (runoff) over SOL area tried quantify separate from climate change.