ABSTRACT
Discharge characteristics must be determined by field measurement or by model tests for the complete weir. The general weir formula (Eq. (9 .8 )) is applicable, with L as the actual crest length; the weir coefficient C has a lower value than that for the equivalent transverse weir. At times of extreme flood, with an exceptionally high head on the weir, the
enhanced discharge normally associated with crest lengthening, is much less pronounced. This is particularly the case with the weir type (h).
