the implicit scheme for HEC-RAS 4.1

[Anonymous]

Hello Everyone
i want to know how to change the coefficient θ (theta), as it’s mentionned in the reference, by default θ = 1, so it’s a full implicit scheme, and it could be a box scheme if it’s θ = 0.5 .. and i didn’t know how to reduce θ !!
it’s for HEC-RAS 1D version 4.1
Regards.

[PaoloP]

On Unsteady Flow Analysis shell —> Options menu —> Calculation Options and Tolerances …

[Anonymous]

i fount it, thank you so much for your help

[Author]

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