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In the section Method, select the desired calculation method from the first drop-down list.
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Under Buildings, select the necessary building type to set a standard-compliant discharge coefficient for the calculation.
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If applicable, enable the options for ground pipes with increased filling level.
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Check the values for Minimum Slope and adjust if necessary.
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Click the tab Rainfall Rate and set the rainfall rate for your project site.
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Close the dialog with a click on OK.
The basic settings for the calculation have been defined and will be taken into account in the next calculation.