The USTREAMSIM service is available for public use at the Infrastrutura Nacional de Computação Distribuída (INCD). This service allows for an integrated 1D / 2D modeling using the combined use of the Basement and SWMM (Storm Water Management Model) models for modeling runoff and drainage systems. Basement is a freeware simulation tool for hydro- and morphodynamic modelling. It’s a 2D tool for numerical modeling of environmental flow and natural hazard events. SWMM is a 1D tool that helps predict runoff quantity and quality from drainage systems.