Flow through Culverts. Flow through Culverts. A short passage way for flow under a highway, railroad or other embankment is referred to as a culvert. Culvert shape may be circular, rectangular, arch or elliptical.
= Culvert width, coefficient accounts for contraction on the sides. For square edge sides, ; and for slightly rounded sides .
accounts for contraction at the sides and the top. For square edge entrance, ; and for rounded edges .
is total losses
is elevation of the water level