TUFLOW Message 1070

TUFLOW Message
ERROR 1070 - Cross-section with effective area must have a relative resistance of 1 in primary sub-section.

Alternate Message
NA

Message Type
ERROR

Description
If using effective area, a relative resistance factor of 1.0 must occur at some point in the profile to indicate the primary sub-channel. If this is not included, grossly incorrect channel velocities can occur.

Suggestions
Update the cross-sections to indicate a primary sub-channel:

• In the 1D cross-section table link (1d_xs) layer, ensure at least one cross-section has the "Flag" attribute set to "R".
• Update the corresponding source table to contain a relative resistance factor of 1.0.

Refer to the TUFLOW Manual for more information on cross-sections.

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