One of the important factors in the destruction of water related structures, such as bridges, is the phenomenon known as local scouring. During this process, part of the river bed particles are washed around the bridge piers and abutments, and they leave holes that cause bridges to overturn. Thus, it is necessary to study and design economical and efficient scour-reduction deceives. Most of ways in order to control and reduce Local scour are done and used for single pier, while most of bridges are in group piers. The two major countermeasure techniques employed for reduction local scour at bridge piers can be Keywords: scouring, group piers, cable, velocity profiles, quadrant analysis
