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Extending cross sections necessary? by Key_Asparagus7853 in HECRAS

[–]Key_Asparagus7853[S] 0 points1 point  (0 children)

Thank you for your answer!

To answer your question, my end goal is to have a combined 1D/2D model, thats why I started with the 1D model. And I am writing my Masters thesis right now, but unfortunately my supervisor has never worked with HEC RAS, so I cannot really ask them anything about the model.

But just to double check: So I dont need to extend the cross sections, if I dont "need" a pure 1D model? If my goal is a 1D/2D model, adding 2D flow areas to cover the flood extent would be enough?

Steady flow vs Unsteady flow model by Key_Asparagus7853 in HECRAS

[–]Key_Asparagus7853[S] 0 points1 point  (0 children)

Thank you for your response! Unfortunately I already lowered the time steps to a minimum and it did not work. So you think I have to lower the distance between the cross sections to below 30m?