Difference between revisions of "TUFLOW Message 1262"
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| Line 4: | Line 4: | ||
|type=[[WARNING]] | |type=[[WARNING]] | ||
|message_desc=Manning's n value assigned to channel is outside normal range. | |message_desc=Manning's n value assigned to channel is outside normal range. | ||
| − | |suggestions=Check Manning's n value for channel. If material values are defined in the XZ cross-section ("M" flag), the n_or_n_F attribute in the 1d_nwk is a multiplication factor and should be set to 1 (this may be adjusted as part of the calibration process). This can occur if a the multiplication value is set to a typical | + | |suggestions=Check Manning's n value for channel. If material values are defined in the XZ cross-section ("M" flag), the n_or_n_F attribute in the 1d_nwk is a multiplication factor and should be set to 1 (this may be adjusted as part of the calibration process). This can occur if a the multiplication value is set to a typical Manning's value (e.g. 0.04) and materials are defined in the XZM cross-section. In this case the Manning's n value may become 0.04 x 0.04 = 0.0016! |
|discussion_page=* [[Talk:TUFLOW Message 1262|Discuss Message 1262]] | |discussion_page=* [[Talk:TUFLOW Message 1262|Discuss Message 1262]] | ||
|link3='' | |link3='' | ||
Revision as of 09:33, 2 February 2011
TUFLOW Message
WARNING 1262 - Manning's n value of ",a," for channel ",a," is unusually low or high.
Alternate Message
NA
Message Type
WARNING
Description
Manning's n value assigned to channel is outside normal range.
Suggestions
Check Manning's n value for channel. If material values are defined in the XZ cross-section ("M" flag), the n_or_n_F attribute in the 1d_nwk is a multiplication factor and should be set to 1 (this may be adjusted as part of the calibration process). This can occur if a the multiplication value is set to a typical Manning's value (e.g. 0.04) and materials are defined in the XZM cross-section. In this case the Manning's n value may become 0.04 x 0.04 = 0.0016!
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