Investigating the Effects of Obstacles’ Arrangement on the Development of Hed Density Current

چکیده مقاله

Density currents are determined as the main factors threatening the water resources and dams’ reservoirs. As they can reduce both the volume of dam’s reservoir and the volume of flood control, they can also affect the quality of water so that they cause reduction in economic efficiency as well as efficiency of electricity production. In this research, the effects of six arrangements on the development speed of the front of density current were investigated. Because the factors such as bed slope and current’s concentration have influence on the development velocity of density current’s front, the experiments have been repetitively conducted on 0 %, 1 %, and 2 % slopes, and with two densities of 40 g/l and 80 g/l. In sum, 42 experiments have been carried out. The results show if there are obstacles in front of density currents, the speed of the front reduces consequently. The arrangement of obstacles are effective in improving the performance of obstacles. By increasing the slope of the bed of the impact of reduced barriers make maximum impact is made and obstacles up 16% and in makeup was similar convergent.

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