ABSTRACT
The present paper illustrates the experimental assessment of scouring and deposition processes around several arrays of permeable gabion groynes with a number of attack angles to the flow. Four scaled T-head shape groynes made of stone were placed in a flume with a constant bed slope and a single steady discharge for submerged conditions. Uniform fine was used as mobile bed. Five attack angles and two separation lengths in between structures were tested. Results show that for each specific separation length, different attack angles produce the minimum scour depths and eroded volumes, largest deposited volumes in between structures, and less scouring velocities at three considered control sections. Therefore, individual attack angles were identified for specific tasks to be better accomplished by such arrays. However, it is acknowledged that more tests with different separation lengths or different sediment sizes of the bed are needed to improve the obtained conclusions.
