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Line 1: {{TUFLOW_Message \|tuflow_message=ERROR 3025: - Roughness height must be >= 0. <br> \|alt_msg=~~None~~NA<br> \|type=[[ERROR]] \|message_desc=Materials may use either fixed mannings, depth-varying mannings, or log-law roughness formulations for bed resistance. ~~\|message_desc=The roughness height "Ks" required for specifying the bed resistance with the theoretically derived log law for shallow flows must be greater than or equal to 0.0.~~ To utilise fixed mannings or depth-varying mannings, the log-law roughness must be set to zero (default). ~~\|suggestions=~~ To utilise log-law roughness, the roughness height must be greater than zero. A roughness height of less than zero is not permitted. \|suggestions=Ensure that all materials that utilise log-law roughness have positive roughness heights. \|prelink=[[TUFLOW_Message_3024\|Message 3024]]

TUFLOW Message 3025: Difference between revisions