Architecture
A. Shamsai; M. Ferasat kish
Abstract
In this study, the numerical modeling of sediment washing in Sefidrood dam reservoir and its effect on reservoir volume recovery in the short and long term have been studied. For this purpose, the GSTARS 3 numerical model has been used to study the different phases of flashing. This model is prepared ...
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In this study, the numerical modeling of sediment washing in Sefidrood dam reservoir and its effect on reservoir volume recovery in the short and long term have been studied. For this purpose, the GSTARS 3 numerical model has been used to study the different phases of flashing. This model is prepared for free and pressurized sedimentation and each of them is analyzed separately. Studies on Sefidrood Dam show that due to the fact that the reservoir water level at the beginning of the flashing operation is one of the influential parameters in the efficiency of sediment washing efficiency, lowering the reservoir water level from normal (271 m) to the power plant (210) M) Reduces the water consumption from 897 cubic meters to 19 cubic meters for washing each ton of sediment. On the other hand, studies show that flashing does not affect coarse-grained sediments in this reservoir and cannot be used as the only solution to prevent reservoir depletion, and additional sedimentation operations such as dredging, use of siphons or In addition to annual sedimentation in the Sefidrud Dam reservoir, it is inevitable that heavy currents will flow through the reservoir.Send
Architecture
S.A. Mir Bagheri; S. Boudaghpour; S.A. Hashemi Monfared
Abstract
Erosion and sedimentation phenomena have many destructive effects on the environment and human life. One of their most important effects is to reduce the volume of dam reservoirs. When the tank can no longer perform the intended service, its useful life is over. So far, several models have been proposed ...
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Erosion and sedimentation phenomena have many destructive effects on the environment and human life. One of their most important effects is to reduce the volume of dam reservoirs. When the tank can no longer perform the intended service, its useful life is over. So far, several models have been proposed to simulate the entry of sediment into the tank, most of which are based on laboratory observations. In this article, Ekbatan Dam has been selected as a case study. First, using the flow profile measurements in the main river, the inlet sediment connection equation to the reservoir is solved. Then, using the sediment continuity equation and four different transfer equations, the amount of precipitation effective in reducing the life of the tank is obtained. These values have been used to calculate the reduction in reservoir volume over a 50-year period, indicating that the Anglo-Hansen method was more consistent with the actual reservoir conditions than other equations. Finally, according to the final equilibrium conditions, the floor profile of the tank is obtained. The results show that after this period, a lot of sediment has accumulated at the foot of the dam and an increase of up to 15 meters has been created.Send
