Hamedreza Hajghassem - Master student of Civil Engineering (Hydraulic Water and Structures), Faculty of Engineering, Kharazmi University of Tehran
Majid Tadayon - Master student of Civil Engineering (Geotechnics), Faculty of Civil Engineering, K.N. Toosi University of Technology, Tehran
Mohammadjavad Mohammadi - Master student of Civil Engineering (Hydraulic Water and Structures), Faculty of Civil Engineering, University of Tehran
Vahid Dashghale - Master student of Civil Engineering (Hydraulic Water and Structures), Faculty of Engineering, Kharazmi University of Tehran
Iman Musavi - Bachelor student of Civil Engineering, Faculty of Engineering, Kharazmi University of Tehran
Saeed Baay - Bachelor student of Civil Engineering, Faculty of Engineering, Gonbad Kavous University, Gonbad

One of the most important factors in the destruction of bridges is the phenomenon of scouring at the piers of the bridge, which has led to a lot of damage so far. For this purpose, it is necessary to predict and estimate the depth of scour. On the other hand, due to the complexity of the flow around the bridge pier, it is very difficult to obtain a general empirical relationship that can provide an accurate estimate of scour depth; In this article, first a review of scouring types, scouring formation mechanism and effective factors in this phenomenon has been done and then the common methods of estimating scouring depth including laboratory methods and other methods, mainly in two categories of classification and Have been evaluated. The relative advantages and disadvantages of these methods have been studied in general.

Bridge piers scouring, estimating the scouring depth, laboratory model, scouring control, bridge piers