STUDY ON THE CHANGE OF RIVER-BED CONFIGURATION CAUSED BY A PERMEABLE GROIN OF STONE GABIONS

Abstract

This paper shows the experimental results on the river-bed configuration caused by a single permeable groin made of stone gabions. The local scour around the permeable groin is proved to be very small, whereas the bed-configuration of the downstream region far from the groin largely changes forming sand waves. The characteristics of the bed configuration downstream of a single permeable groin are experimentally revealed to be influenced by the permeability and the scale of the groin of stone gabions as well as the flow conditions such as submerged or emerged flow over the groin.