10.4122/1.1000001706
Uyumaz, A.
A.
Uyumaz
Discharge control by a side weir in a triangular main channel
DTU Library, Technical University of Denmark (DTU)
2005
Conference full text
Side weir
discharge
discharge capacity
water surface
triangular channel
Istanbul Technical University, Department Of Civil Engineering
Department Of Civil Engineering
Istanbul Technical University
2005
en
10.4122/1.1000001705
application/pdf
Discharge control by a side weir in a triangular main channel By Ali Uyumaz1 1Department of Civil Engineering, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey. e-mail uyumaz@itu.edu.tr ABSTRACT Side weirs have been used extensively for water-level control in irrigation and drainage canal systems, as a means of diverting excess water into relief channels for flood protection works, and as storm overflows from urban sewage systems. A complete analytical solution of the equations governing the flow in the side weir channels is not possible. Until quite recently, approximate methods based on experiments conducted over a limited range of the many variables involved have been used. In many cases, the use of such methods caused very substantial errors in the calculated spill discharge. The flow over a side weir in a rectangular channel has been the subject of many investigations but there are no more studies about side weirs in a triangular channel reported in the literature. In this study, numerical investigations of flow over side weirs in triangular channels are reported. Numerical models are obtained from energy principles on the basis of a constant energy assumption and solved by a finite difference method. The results are presented in graphical form. The study covers both sub- and supercritical flow regimes. Derived expressions are compared with experimental results for the side weir discharge and water surface profiles for these regimes. KEYWORDS Side weir; discharge; discharge capacity; water surface; triangular channel