Determination of Sequent Depth Ratio of a B-Jump on the Smooth Bed

Document Type : Research Paper



     B-jump is defined as the jump having the toe section located on a positively sloping upstream channel and the roller end on a downstream horizontal channel.predicting the occurrence of such jump and determination of the sequent depth can help the engineer to better design the stilling basin’s wall. This is because the component of water weight within the jump can not be neglected and it is too difficult to calculate accurately. Therefore the sequent depth ratio relation can not be developed by using the momentum equation then experimental based formula should be used. In this paper first a literature reveiw is conducted then by applying the П-theorm and defining new variable of , k , which is the upstream and downstream jump water surface elevation difference, a non dimensional relation was developed, which is not dependet on slope. To verify such relation an extensive experimental tests was conducted. By using the SPSS software an experesion was developed which show the new formula can be applied for all range of chute slope. Comparison of previous relations with our relation show that the new relation can predict the sequent depth more accurate.


  • Receive Date: 22 December 2012
  • Revise Date: 10 January 2015
  • Accept Date: 07 July 2013
  • Publish Date: 23 October 2014