List of Articles Sediment management

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  1 - Laboratory evaluation of the effect of permeable vanes distance using six-pillar concrete elements on the bend migration
  Ebrahim Najjaran Amir Abbas Kamanbedast Mahmood Shafai Bejestan Alireza Masjedi Hooshang Hasonizadeh
  Permeable vanes are structures that move the erosion of the outer bank of the river by diverting the erosive flow from the outer arch of the river to its center. In this study, the pattern of erosion and sedimentation around the hydraulic structure in the installation c More

  Permeable vanes are structures that move the erosion of the outer bank of the river by diverting the erosive flow from the outer arch of the river to its center. In this study, the pattern of erosion and sedimentation around the hydraulic structure in the installation conditions of different distances from each other has been studied. Six-pillar concrete elements are materials that form a permeable structure overlapping and are applicable without drying the riverbed. These blocks need to be examined for how the structure works. With this concept, in the present study, the performance of this structures were performed in a laboratory channel with a width of 60 cm and a 180 degree flume under different hydraulic conditions (Fr = 0.227, 0.244, 0.261, 0.278). The required data were measured at different distances (5L, 6L, 7L, 8L) with an effective length equal to 20% of the width of the flume (L=12cm). Control experiment was performed in similar conditions to other scenarios without groins construction. Comparison of the results of the control and main experiments showed that the construction of permeable rectangular groin with a distance of 5L had the best efficiency in reducing the maximum depth of scour at the outer bank compared to the control experiments equal to 70.1% and 57.9% in Froud numbers of 0.227 and 0.261, respectively. Manuscript profile
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  2 - Investigation of Numerical Modeling to Modify The Geometric Structure of Submerged Plates in The Management of Diversion Sediment to the Lateral Catchment Using CCHE 2D Software
  AMIN JOOBAND MOHAMMAD HOSSEIN PURMOHAMMADI
  Due to the expansion of the use of water resources, the use of water transfer structures is increasing day by day. Due to the sedimentation of sediments and their movement in water transfer structures, they are damaged. Therefore, scientists decided to use different met More

  Due to the expansion of the use of water resources, the use of water transfer structures is increasing day by day. Due to the sedimentation of sediments and their movement in water transfer structures, they are damaged. Therefore, scientists decided to use different methods to control sediments. One of these methods is the use of submerged plates. These plates act in a way that directs the sediments along the direction of the flow and reduces the sediment entering the reservoirs. In this study, we try to investigate the use of modified plate shapes by numerical modeling with CCHE 2D software in a laboratory model and its effect on the management of diversion sediment to the lateral catchment. In this study, we used 5 different shapes, one of which is a simple rectangular plate as a control that other plates have been compared with this plate without using submerged plates. Sediment to the lateral reservoir is effective. The present study investigated the simulation of a laboratory flume with a 60 degree reservoir and an average sediment particle size of 1.59 mm with four landings of 0.45, 0.55, 0.6 and 0.66. Manuscript profile