A simulation is to apply a rainfall to a drainage network to calculate hydrograph. A simulation run can be created by combining the rainfall (design storm) and drainage network (scenario).

To create a simulation, click the Run button located at the Simulation tab to open the Batch Run window. A default simulation has been created with the default rain group (a Chicago design storm). The simulation can be renamed and changed to use another rain group. New simulation can be added by clicking the Add button in the toolbar.

To run simulations, check the simulations in the first column and then click the Run button at the bottom. A window will appear to show the simulation run progress. The Batch Run window will be closed after the simulation run is finished.