Scouring is wearing away of riverbed material that supports piers or abutments. The piles or pier foundation get exposed down to significant depths due to large scale scouring. This may destabilize the foundation of the bridge causing bridge failure. Scouring thus compromises the safety of the bridge. It has been the cause of failure of several bridges around the world. It is thus, critical for the stakeholders to detect the occurrence of stream/riverbed scour at bridge piers and monitor the scour depth variation.