Next: Editing substance data Up: Setting up a scenario Previous: Creating a new scenario

### Needed inputs

Having now created a new scenario you may use the settings and data loaded from the data bases (by selecting substance and catchment) or modify them.

As mentioned above, GREAT-ER provides several complexity modes for the various models. Obviously, the amount of required data increases with the complexity mode of a model. The GREAT-ER user interface accentuates this by colouring parameter values within the dialogs: Parameters coloured green are definitely not used in the current model mode selection. Values coloured black might be used.

Please see below for a detailed description of the model complexity modes and the required parameters.

By default all submodels (sewer, waste water treatment and river) are set to complexity mode one. The parameters needed at this complexity level are mentioned in the sections below.