The hydraulic performance of the sewer network can be demonstrated with BaSYS using the integrated hydrodynamic simulation procedure. Intuitive technical data forms provide detailed views and tables for the acquisition, planning and management of master and hydraulic data. Hydraulic variants enable the design of different design variants without changing the master data. The specialist data forms and interactive graphics allow the results of the calculation to be checked in a variety of ways and in a clear manner. General default data such as channel profiles, precipitation models and catchment area characteristics are available in cross-project and individually configurable libraries.