阿尔塔什水利枢纽泥沙淤积模型试验研究.pdfVIP

Abstract Altash Reservoir is the water conservancy hub project for controlling the The lower reaches of the Yarkant River Mountain. On the premise of guarantee to the tarim river ecological water supply, giving priority to flood control, irrigation, giving consideration to power generation. Reservoir storage quantity of suspended sediment averaged over many years is 29.93 million ton, storage quantity of bedload sediment averaged over many years is 3.85 million ton, annual sediment runoff is 86.06, the reservoir sediment problem is very serious. Combining with alta reservoir, the physical model test was established, The horizontal and vertical scales of the model are 1:500 and 1:100 respectively. The model suspended sediment gradation is designed in accordance with similarity of settling velocity, and checked with similarity of lift up velocity; The model bed-load sediment gradation is designed in accordance with similarity of pick up velocity. In view of the two kinds of operation regulation, the reservoir sediment deposition evolution process, amount of sedimentation and sediment concentration of the generating set machine are studied, analysis summarized impact of operation regulation on sediment of the reservoir. Through the comparison and analysis, the reservoir for the future of the operation and management of sediment dispatching operation schemes are proposed. As to the operation regulation 2 among the two kinds of operation regulations, it maintained a low water level in 100 years, and the sand deposited in the front of the dam with a delta form, there was no sediment deposition at the end of the reservoir and the amont of the deposition was relatively small