Experimental Study on The Arrangement Effect of Cylindrical Obstacles on Saline Density Current body

Density currents occur when fluid of onedensity propagates into a fluid of different density. These currents are the main caude forsediment transport in dam reservoirs and estuaries. Thenegative effects of density currents can be minimized using obstacles. Theobstacles can totally or partially block density currents and thussedimentation will occur far from the dams.In this paper, the effect of cylindrical obstacles and their arrangement ondensity current body is experimentally studied. Obstacles with constantdiameter and height were glued on the bed in staggered form. The staggered formwere constant during all the experiments, but transverse longitudinal distancesbetween obstacles were variable. It caused two beds with different arrangementof obstacles. The results indicated that rate of mixing in bed with obstaclesis greater than bed without obstacles. So velocity and height of headin bed with obstacles decrease about 40 present