Impact of Spur Dikes and Submerged Vanes on diverted discharge and maximum scour depth at mouth of intake

摘要

Intake of river is done for different purposes such as irrigation, urban water supply, industry, electricity, etc. Sideintakes are used for ongoing river to the flat lands. One of the issues that faced by designers of water structures is thedesign of sediment control facilities in the place of drainage and irrigation networks inlet. In this research, the effect ofConjugate Usage from Spur dike and Submerged Vanes, and affect of Spur dike length and its locating and angle on theamount of discharge and maximum depth of scour hole in intake month on three different deviation discharges has beenstudied experimentally. Experiments were performed in a flume with 14m length and 150cm width, and a side intakewith 75 degree angle to the main flume, with 60cm width. The effect of three deviation discharge 15%, 20%, and 26%and in each three discharge effect of two locating and three lengths and two angle of abutment were studied. In eachexperiment, information of water depth in main flume, water depth in intake channel and maximum depth of scour holein the inlet of intake were plotted and analyzed. The results show that position, length and angle of Spur Dike have asignificant impact on diverted discharge and maximum scour depth. Overall, using from spur dike with angle of 75degree and with length of 18% of flume width, and locating at 1.2 width of intake upstream of the intake has the mosteffect on increasing the water discharge in intake and decreasing the maximum of scour depth on inlet of the intake