hello all,
there's a significant difference when the steady flow analysis is done with many profiles at a time and when it is done with single profile each time. for example the discharge and head over the crest. why is that?
here's the profile plot for culverthttp://files.engineering.com/getfile.aspx?folder=d70e60dd-ebab-4062-be1e-0f418c772eb4&file=Rating_curve_for_Lateral_Structure.pdf
I have attached the Excel sheet of HEC calculations, which shows that at profile 8 the the WSEL is above 335 m for the lateral structure but for the culvert it is still below 335 m so there is no weir flow.
There is no submergence effect coz the d/s water level is well below the crest(335m)...
SMIAH,
but why is the shape of the curve different in excel and HEC?
at some point in HEC the C value seems to be less and the curve rises rapidly for less discharge, which is not the case for Excel.
Hello everyone,
I have attached a rating curve which i developed from HECRAS and Excel for a lateral structure (spillway) which drains into a culvert, the crest elevation of spillway is 333 meter and that of the roadway is 335 m.
I took a C value of 1.44 (SI) assuming the spillway as broad...
