Bed elevation at upstream side of bridge (ft/m)

Input the bed elevation at the upstream side of the bridge for overbank and channel. This is used to calculate the bridge opening height, from the bed elevation to the low chord elevation, at the upstream side of the bridge. Please refer to FHWA Manual HEC-18, Fifth Edition, Section 6.10 for a discussion of the procedure for estimating pressure flow.

image007 (34K)