Applies To
	Product(s):	Bentley CivilStorm, Bentley SewerGEMS
	Version(s):	08.09.XX.XX , 08.11.XX.XX, 10.XX.XX.XX
	Area:	Layout and Data Input
	Original Author:	Jesse Dringoli, Bentley Technical Support Group

Problem

In CivilStorm or SewerGEMS, what is the difference between a suppressed or contracted weir?

Solution

A contracted weir has its crest and side so far removed, respectively,
from the bottom and sides of the weir box or approach channel in which
it is set, that full contraction, or reduced area of flow, is developed.

If the weir conforms to the sides of the approach channel above the
crest and the channel sides extend downstream beyond the crest, thereby
preventing lateral expansion of the nape, the end contractions are suppressed.