Laboratory Study of the Effect of the Branching Angle and the Branching Channel Slope on Flow(Arabic)

Abstract

In this paper the hydraulic characteristics of branching flow in open channel has been studied, a main channel was used with a branching channel connected with three angles (30, 60, 90) with four bed slopes (0.001, 0.0015, 0.002, 0.0025) and at each slope five values of discharge were pass in the main channel (13, 14, 15, 16 and 17.25) l/s. For each discharge five depths of water were allowed in the branching channel in each experiment. The results of the experiments indicated that the discharge ratio increases with increases bed slope of the branching channel. It was also found that the highest discharge ratio is obtained in the angle 60 then the angle 90 and then angle 30. The results also showed that the relationship between the discharge ratio and Froude number is linear and direct proportional to the Froude number in the upstream main channel and in the