Experimental Study on Gabion Stepped Spillway

  • Mahmood Shafai-Bejestan
  • Gh. Kazemi-Nasaban
Part of the Geoplanet: Earth and Planetary Sciences book series (GEPS, volume 1)


Use of rocks and gabions in hydraulic works, especially in the area of river engineering, has been increased during recent decades. Gabion stepped spillway is a type of hydraulic structure which is designed for river bed protection. Most of the flow kinetic energy is dissipated when flow cascades from one step to another. Therefore, in most cases, the stilling basin is not considered at the downstream end of spillway, and because of this a scour hole may develop. The main objective of this study is to conduct a series of experimental tests to investigate the mechanism of scour hole downstream of the stepped spillway. A total of 19 tests were conducted. The results of this study reveal that the scour hole dimensions in simple stepped spillway are larger than the pooled stepped spillway. Three equations have been presented for prediction of maximum scour hole depth. Design procedure is presented for gabion stepped spillway.


Incipient Motion River Engineering Rock Fill Flow Cascade Energy Dissipation Structure 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.College of Science and Water EngineeringShahid-Chamran UniversityAhwazIran

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