Discussion of 'New Theoretical Solution of the Stage-Discharge Relationship for Sharp-Crested and Broad Weirs'

摘要

The author is complimented for attempting to develop a general formulation for all types of weirs including rectangular sharp-crested and broad-crested weirs, oblique weirs, labyrinth weirs, triangular sharp-crested (Thomson) weirs, and sharp-crested weirs with parabolic profiles, using dimensional considerations and the incomplete self-similarity theory. In his formulation, as presented in Eqs. (3)-(5) of the paper under discussion, for rectangular weirs, k_scould be seen to be equal to the critical depth. Then Eq. (5) becomes simply h = by_c, where b depends on h/ p for sharp-crested weirs. For rectangular weirs of finite crest length, from the recent work of Azimi and Rajaratnam (2009), it appears that b will depend upon h/L in addition to h/p where L is the length of the weir in the direction of flow.