HEC-RAS CHECK

[brianchapman]

This is what I do to do a simple check of CFS through a channel, please let me know if this is wrong. (after
existing ground cross sections are imported and cfs set).

1) I set manning's n for left, center, and right bank.
2) I set upstream and downstream to critical.
3) I place an encroachment distance.
4) I compute.
5) I fix errors.
6) I do the final compute.

Am I placing enough information into HEC-RAS or should
I add more? Thanks anyone.

 

[RWF7437]

Not sure if this answers your question but wouldn't it be easier to simply set the downstream "known" water surface at normal depth?

 

[brianchapman]

Don't know...why would it be easier?

 

[RWF7437]

Because you would only set one water surface elevation, not two. Also, normal depth is the depth the water surface will tend toward in an infinitely long, uniform channel.

Seems logical to me but what do others think ?

Russ