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Select Model

The Model Selection allows you to select the complexity modes for the three submodels: sewer, WWTP and river. The text field on the right provides some hints on the selected mode. If you change complexity modes, it is usually necessary to go back to earlier data dialogs to enter additional parameters. E.g. if you need in-sewer removal to be considered, you have to go back to the substance data dialog to enter a removal rate for sewers. Please note that in-sewer removal is the only higher model in which only one parameter has to be entered. All other submodels require a somewhat larger data set.

The "impose default complexity mode" check button should usually be checked. After reference to the technical description of the model input tables real GIS experts have the option to specify different complexity modes for selected geographic objects. These options are not covered by this manual because they are not part of the easy-to-use mode.

As mentioned earlier, GREAT-ER uses the Monte-Carlo method to set a stochastic approach on top of a deterministic model. The number of Monte-Carlo shots performed during a simulation also has to be entered within the Model Selection dialog.

Please refer to the model documentation for more information on the model's complexity levels.

Next: Edit Model Parameters Up: Model Previous: Model