TY - JOUR ID - 14299 TI - Investigation the effect of the height and distance of successive obstacles on the control of density current JO - Irrigation Sciences and Engineering JA - JISE LA - en SN - 2588-5952 AU - Toozandehjani, Mohamad AU - Haghiabi, Amir Hamzeh AU - Kashefipour, Mahmood AU - Turabi Podeh, Hasan AD - Phd student of water structures of Lorestan University, Khorramabad, Iran. AD - Professor Faculty of Agriculture, Water Department, University of lorestan, khoram abad, Iran AD - Professor of Department of Water Structurs Faculty of Water and Environmental Engineering, Shahid Chamran University of Ahvaz, Iran. AD - Assistant Professor, Faculty of Agriculture, Water Department, University of lorestan, khoram abad, Iran. Y1 - 2023 PY - 2023 VL - 45 IS - 4 SP - 1 EP - 14 KW - Useful life KW - Dam reservoir KW - slope KW - Sediments KW - Density DO - 10.22055/jise.2018.26213.1782 N2 - Obstacle usually blocks the current and it has been found by other researchers an obstacle with a height more than two times of body height of flow is necessary to fully block the density current. The construction of an obstacle with this elevation creates problems in terms of performance and sustainability as well as the accumulation of sediments behind it.Rottman et al. (1985) solved the analytical solution of the two-phase current in a horizontal slope with an obstacle in the steady and unsteady flow and concluded that if the height of the obstacle is twice the body height of the density current so the density current is completely blocked. Prinos (1999) conducted studies on the effect of the shape of the obstacle on the current control. In his experiments, he used two semi-circular and triangular obstacles with the same height and concluded that the shape does not have a significant effect on the control of high current. Also, in the range of densimetric Froude number, 0.7 < Frd < 0.8 if the height of the obstacle is twice the height of the body of the density current, the current will be fully restrained. As it has been stated, for a complete block of density current, based on the results of previous investigators, the height of the obstacle should be at least twice the height of the body.The purpose of this study is to use successive obstacles with lower height, with greater sustainability and lower cost, in controlling density current. For this purpose, in different conditions, in terms of slope and concentration, three rows of obstacles with different heights and also different distances were used to control sedimentary and salty density current. UR - https://jise.scu.ac.ir/article_14299.html L1 - https://jise.scu.ac.ir/article_14299_41ac7d36bd45b1203d293c640c7b6676.pdf ER -