Author(s): M. S. Sabegh; M. Habibi
Linked Author(s):
Keywords: Intake; Groin; Submerged Vanes; Diversion Channel; Physical Modeling; Flood; And Sediment Movement
Abstract: One important difficulty in a lateral intake is the reduction of water entered into the diversion channel during the flood period. Here, in order to increase the flood diversion efficiency, two kinds of experiments have been done in a hydraulic laboratory flume. One of them is application of groins in the apposite bank of intake and the other one is applying submerged vanes near intake and across upstream riverbed. In these experiments, discharges were 50lit/s, 60 lit/s, 70 lit/s and the dimensions of flume were 30m (length) and 1.5m (width), bed slope was 0.005 and the angle of diverted channel was 60o. The results show that: 1) When groins were used; by increasing the discharge in the main channel the lateral discharge would increase, also the sediments inclusion into the intake would decrease due to the scour formation in front of the intake. 2) When submerged vanes were applied; by increasing in discharge, the sediments that could enter the intake were decreased because of the vanes effect on making a longitudinal groove in front of the intake. It is also noticeable that when the longitudinal and transversal distances between vanes are equal to 4H (four times of vanes height), the water diversion efficiency is the best.
Year: 2003