A barrage is proposed to be constructed across river Sabarmati, 60 km downstream of Daroi dam to create reservoir within the bank for recharging and meeting water demand of nearby areas. For analyzing the flow pattern and assessing the hydraulic parameters of Hipura barrage on Sabarmati river near Hirpura village of Mehsana District of Gujarat, a 3D physical model with geometrically similar scale 1:80 for river reach 3 km (1 km upstream and 2 km downstream) and for assessing the adequate energy dissipating arrangement a sectional model with scale 1:40 are used. These experimental observations on physical models are carried out at GERI and have been used to calibrate HEC-RAS based model for Manning’s roughness (n). The calibrated parameters of model are used to compute the hydraulic parameters in HEC-RAS model in the steady state condition of flow in the river reach for 25, 50, 75 and 100% of design discharge 16785 ??3/s (5.9 lakh cusec). From the observed values of velocities on the left bank, the protection work for about 500 m is suggested on upstream side as well as downstream side on both the banks. Present study describes the flow analysis using 30 cross sections and topographical details of river reach under study in existing conditions of river without the barrage and with barrage in position. The results of the prediction run indicated that the FRL 99.00 m can be maintained by opening 19 vertical lift gates up to 25% discharge. If the discharge exceeds 25%, all flood gates should be kept open in free flow condition.