Use of brink depth in discharge measurement

TİĞREK Ş., Firat C. E., Ger A. M.

JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING, vol.134, no.1, pp.89-95, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 134 Issue: 1
  • Publication Date: 2008
  • Doi Number: 10.1061/(asce)0733-9437(2008)134:1(89)
  • Journal Name: JOURNAL OF IRRIGATION AND DRAINAGE ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.89-95
  • Keywords: discharge measurement, open channel flow, subcritical flow, Supercritical flow, weirs, RECTANGULAR FREE OVERFALL, FLOW MEASUREMENT, CHANNELS
  • Middle East Technical University Affiliated: Yes

Abstract

The behavior of free surface flow at a rectangular free overfall is studied experimentally to obtain a relation between the brink depth and the flow rate. A series of experiments were conducted in a tilting flume with wide range of flow rates covering subcritical, critical, supercritical regimes, and two different roughnesses in order to develop a relationship between the discharge and the brink depth. An equation is proposed to determine the flow rate using the brink depth for a channel of known roughness and bed slope.