Effect of the Geometric Characteristics of Baffled and Bed Slopes of Drop on Hydraulic Flow Conditions in Baffled Apron Drop

Document Type : Research Paper



In this research study the effect of different widths of baffles, different distances of baffles rows and bed slopes on structure's energy dissipation was investigated using the physical models of baffled apron drops with 3 different widths (7.5, 11.25 and 15cm), and 3 different row spaces (15, 22.5 and 30cm), and three bed slopes of drop (21.8, 25.6 and 35 degrees). In total a number of 120 experiments were carried out with different combinations of baffles size and spaces, bed slope and different discharges (15, 20, 25 and 30lit/s). The measured energy losses show that increasing of baffle width and row space increases the energy loss. Also the bed slopes of 25.6° and 35° have the maximum and the minimum energy losses, respectively. According to these experiments the model with the largest width and row space on the 25.6° bed slope has the maximum energy dissipation, when compares with the other considered models. 


  • Receive Date: 10 December 2012
  • Revise Date: 07 January 2015
  • Accept Date: 11 May 2013
  • Publish Date: 23 September 2014