TUFLOW Message 3026

TUFLOW Message
ERROR 3026: kappa must be >= 0.

Alternate Message
NA

Message Type
ERROR

Description
Materials may use use either fixed mannings, depth-varying mannings, or log-law roughness formulations for bed resistance. When utilising log-law roughness, a value for kappa of less than zero is not permitted. kappa is typically in the range 0.38 to 0.42 (recommend 0.4).

Suggestions
Ensure that all materials that utilise log-law roughness have positive values for kappa.

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