This paper studies scour features and velocity field using experimental and numerical models atrectangular piers under influence of contraction upstream abutments. A bridge model of two ventsof 8cm width each is built to conduct experiments. Extra-piles are proposed upstream rectangularabutments. Different relative extensions of piles are tested. In addition, a new abutment of a relativewidth ranges within 0.0 to 1.25was proposed instead of piles. The flume’s dimensions are 40cmwidth, 20 cm deepness and 400cm length. Some design rules are deduced to reduce scour upstreamrectangular piers. Cases of locating piles upstream abutments are simulated numerically usingSToRM solver in iRIC software. The numerical results indicate that, piles of a relative extension tovent width = 4.812 produce the minimal flow velocity near rectangular piers.