HEC RAS bank stations
HEC RAS bank stations
(OP)
I have a meandering stream in superflood (the 100-year storm). My colleague and I can't seem to agree about the location of some of the bank stations. I want them at the obvious steep-to-flatter slope change on the cross-section, but my colleague likes to move banks stations to make the "picture" look nice. He likes all of the red dots on the Geometric Data window to be perfectly in line, even if that is not the actual bank.
How much does it matter where the bank stations are set in HEC RAS? Assuming I use horizontal variation for the n-values, changing n where the bank actually is, and not have the break in n-value at the red dot bank stations, what else does that bank station affect in computations? Could an incorrect bank station actually make the results inaccurate?
How much does it matter where the bank stations are set in HEC RAS? Assuming I use horizontal variation for the n-values, changing n where the bank actually is, and not have the break in n-value at the red dot bank stations, what else does that bank station affect in computations? Could an incorrect bank station actually make the results inaccurate?
Talk To Other Members
RE: HEC RAS bank stations
You could do a sensitivity analysis to see how much impact it makes, but strictly speaking you are correct and your college's insistance that the geometric window look pretty is trivial. I never once even printed out my geometric window image. Also, anyone reviewing your model will notice straight away that your bank stations are in the wrong place as they show up on the cross-secion plots.
RE: HEC RAS bank stations
I will do a sensitivity analysis and report the results here.
RE: HEC RAS bank stations
Someone may know if you get extra warning messages in HEC-RAS due to an expansion or contraction due to bank stations. I think improper bank stations placement affects floodway tests with Check-RAS.