Plunge pool not created

[engrsalah]

Salam
Respected dears,
a high flow is coming from the top (28 m head) as seen in the figure attached. but still the flow is below the critical line in the downstream portion. while practically this not possible (as there will be a hydraulic jump will produce). is there any justification for this?

 

[OSUCEFE]

I'm a novice HEC-RAS user, but I would suggest double-checking the downstream boundary condition. It seems you would need a boundary condition that accurately reflects the level of the plunge pool.

 

[gbam]

First off, I apologize for the late response. It appears to me, that the stilling basin is not long enough. I suggest you review FHWA' HEC-14 for design.

https://www.fhwa.dot.gov/engineering/hydraulics/pubs/06086/hec14.pdf

 

[engrsalah]

gbam thanks for reply . now i checked actually the depth was not sufficient