Unsteady flow Model

[tidehunter]

I am very new to HEC-RAS. i am trying to run a unsteady flow model for a complex network. but model is showing error. the error massage is given as a picture below. Can any one please help me.

[tidehunter]

editional images showing total error massages

[jadams]

For unsteady modeling the more complex your model the more difficult it becomes to keep it stable. A model becomes unstable when calculation iterations yield an error greater than the allowable tolerances set in the program. The first thing I would recommend is performing a draw-down model to calculate your initial conditions. See: http://hecrasmodel.blogspot.com/2010/12/how-to-create-hotstart-file-in-hec-ras.html

[Anonymous]

Thnx for your suggestion.

[Anonymous]

I would also check your time step as it appears it is set to one hour which is probably higher than it should be.

http://hecrasmodel.blogspot.com/2013/10/stabilizing-dynamic-unsteady-hec-ras.html

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