This library has a table of overland flow manning's values that are used in TR-55 sheet flow Time of concentration calculation. The library file is in the ...\USER folder and is available for all projects.
From the Network > Sewer Network Libraries menu in the Hydrology Module, select Overland Sheet Flow Surface Manning's N Library to open the library dialog. It shows the list of surface covers and the conresponding Manning's N values. New button creates a new manning's n entry, Edit button allows you to modify the highlighted entry, and Delete button removes the highlighted entry from the library. Load and SaveAs buttons allow you to load and save the library data.
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Overland Sheet Flow Surface Manning's N Library |
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Manning's N New Entry |
Overland Sheet Flow Surface Manning's N Library dialog: Fill in values.
Pulldown Menu Location: Network > Sewer Network
Libraries > Overland Sheet Flow Surface Manning's N Library
Keyboard Command: overlandnlib
Prerequisite: None
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