عنوان مقاله [English]
A major problem with which most of the lateral intakes are faced, is accumulation and sediments entering the intake entrance and diversion efficiency is reduced. Sediment control is one of the most important issues in river engineering. To reduce sediment entering the intake entrance can be From the methods of controlling the Sediment entering to the intake entrance . In this study effect of the location, and angle of the spur dike and using skimming wall on the amount of delivered sediment into the lateral intake and intake ratio were testing. Effects of angle variations(30,45,60,90) of spur dike and spur dike location(b, 2b, 2.5b ,3b) on intake ratio and delivered sediment into the intake were investigated (b is the intake width ). Results show that discharge 60( lit/s), and spur dike with 60 degree angle and 2b distance from the center intake entrance in combination with the skimming wall compared to an angle of 30, 45 and 90 degrees, respectively, 27, 14 and 12 percent less sediment and 53, 45 and 16 percent superior discharge into the the intake diverts. Also by increasing the parameter the ratio of distance of spur dike, to the width of intake, Ratio of flow deviation to the intake for angle of 30°, 45°, 60° and 90°, and u ̅/u_c =1.05 for 5, 13, 2 and 23% Respectively, u ̅/u_c =1.08 for 2, 3, 3 and 2% Respectively , u ̅/u_c =1.11 for 17, 24, 2 and 10 percent Respectively increases.