Hi everyone,
I am working on a project that requires me to model weirs with height and width that vary with time. Usually the height of weirs is 0 (no weir at all), 2 or 3 ft. The width of weirs can be zero, partial or full width of a channel. I searched the Internet, it seems this topic has not been covered yet. Does anybody have experience in modeling this type of weirs?
Try using a series of overflow gates. In the flow editor, you can set them to any height individually to effectively simulate what you are talking about.