InfoDrainage 2021.1 Help Documentation infodrainage2021v1

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Safety Factor - Reduces the infiltration rate during the analysis to account for silting up or poor maintenance. This is required for the UK.

This option may not be available for your region. For more information, refer to the Regionalisation topic.

Consider Longitudinal Delay - Determines if a time of travel needs to be considered across the structure. This may not be required as they are laid flat and can be considered as filling instantaneously. If the travel time is to be considered a roughness method and value should be selected.