This Paper Studies Scour Features And Velocity Field Using Experimental and numerical models at rectangular piers under influence of contraction upstream abutments. A bridge model of two vents of 8cm width each is built to conduct experiments extra-piles are proposed upstream rectangular abutments .Different relative extensions of piles are tested in addition a new abutment of are a relative width ranges within 0.0 to 1.25 was proposed instead of pies the flume’s dimensions are 40cm width 20cm depth and 40cm length. Some design rules are deduced to reduce scour upstream rectangular piers. Cases of locating piles upstream abutments are simulated numerically using SToRM solver in irIc software. The numerical results indicate that piles of a relative extension to vent width = 4.812 produce the minimal flow velocity near rectangular piers . Also, the main conclusions are: 1- The additional piles of Lr = 4.812 produces the minima Scr upstream bridge in contrast, Lr = 3.937 gives extreme values of Scr. Median value of Scr upstream bridge increased by about 50% in comparison with the base case. Scr upstream rectangular pier increased for 1.312 <Lr<4.812 . 2- The additional abutment of wr = 1.25 gives extreme values of Scr upstream rectangular pier. It increased median Scr by 95% . 3- Simple predicting equations for Scr water developed RSQ of developed equations are 89.6 % and 91.6 % respectively. 4- The results using SToRM solver in IRIC yielded that piles of Lr = 4.812 produces the minimal flow velocity at rectangular piers. The area of the high velocity was increased for Lr = 3.62, while it was at the minimal value near the abutments and pier for Lr = 4.812 .