Abstarct: One of the main approaches to decrease local scour around bridge abutments is spur dike. Appropriate and optimum design of spur dike may modify hydraulic conditions, decrease scouring power and sediment transport capability of water flow and subsequently improve river banks and abutments protection. In this research, influences of geometrical and hydraulic properties of T-shaped spur dike on scouring rate and flow pattern change around bridge abutments located in floodplain and also 2-D simulation of flow hydraulics and sedimentation by using CCHE2D numerical model are studied. In first step, experiments in 18, 20, 22 and 24 (lit/sec) flow discharges without considering spur dike were performed and in next step an impermeable, solid, , non-submerged, vertical and T-form in 9, 12, 18, 24, 30, 60 and 70 (cm) distances from abutment and with 6, 7.5, 9, 10.5 and 12 (cm) web length (Lj) and 6, 7.5, 9, 10.5 and 12 (cm) flange length (Lb) were performed in interested discharges. Then flow and sediment patterns around T-form spur dike have been simulated numerically by CCHE2D model and results have been compared with results of physical model. Turbulence of mixing length model used to perform hydraulics of model. Also different roughness coefficients were introduced to model that by using trial and error method 0.0149 was selected as final value. Measured flow depth was used to compare results of model with measured data. In addition, observations show that flow after striking spur dike deviates and eddy area with severe turbulence is produced around spur dike. Hydraulic process of this flow cause development of local scour area around spur dike, sedimentation as a long sediment load and changing bed form in downstream reach of spur dike that this process cause natural consolidation of abutments. Engelund and Hansen (2000), Wu et al. (2000), SEDTERA (1995) and Ackers and White (1983) formulas of sediment transport were used to perform sediment part of model. RMSE value of model for estimating scour depth by interested formulas was equal to 2.78, 8.68, 1.98 and 1.87 (mm) respectively. The results indicate a better estimate of the transfer function Ackers and White (1983) and worse estimate the transfer function of Wu et al than other functions In general, results obtained in this research show that CCHE2D model is suitable for estimating scour depth in bed cross section in the present study