本文關鍵詞： 阿爾塔什水庫 泥沙 淤積形態(tài) 淤積量 過機含沙量 物理模型試驗　出處：《天津大學》2014年碩士論文　論文類型：學位論文

【摘要】：阿爾塔什水利樞紐工程是葉爾羌河干流山區(qū)下游河段的控制性水利樞紐工程，在保障向塔里木河干流生態(tài)供水的前提下，以防洪、灌溉為主，兼顧發(fā)電等綜合利用。水庫多年平均入庫懸移質輸沙量為2993萬t，多年平均入庫推移質輸沙量為385萬t，庫沙比為86.06，屬于泥沙問題比較嚴重的水庫。 本文結合阿爾塔什水庫，采用物理模型試驗，水平比尺L500，垂向比尺H100。懸移質泥沙按照沉降相似準則設計模型沙級配，同時進行揚動流速相似的校核；推移質泥沙按照起動流速相似準則設計模型沙級配。 針對兩種水庫泥沙調度運行方式，研究了水庫泥沙淤積演變過程、各特征庫容的淤積量、發(fā)電機組的過機含沙量等，，分析總結了不同運行方式對水庫泥沙淤積的影響。通過對比分析，為水庫的泥沙調度運行方案提出建議。兩種運行方式中，運行方式二，水庫運行100年，汛期保持低水位運行，淤積三角洲推進至壩前，庫尾泥沙基本無淤積，淤積總量相對較小，興利庫容較大，為本文的推薦方案。
[Abstract]:The Altash Water Conservancy Project is a controlling water conservancy project in the lower reaches of the mountainous area of the Yerqiang River. On the premise of ensuring ecological water supply to the main stream of the Tarim River, the main project is flood control and irrigation. The average amount of suspended sediment into reservoir is 29.93 million t, the average load of bed load is 3.85 million t and the ratio of reservoir to sand is 86.06, which belongs to the reservoir with serious sediment problem. Combined with the Altash reservoir, the physical model test, horizontal scale L500, vertical scale H100. the suspended sediment design model sand gradation according to the settlement similarity criterion, at the same time carry on the examination of the similar lifting velocity; The model sand gradation is designed according to the incipient velocity similarity criterion. In view of two kinds of reservoir sediment operation modes, the evolution process of reservoir silt accumulation, the silting capacity of each special reservoir, the sediment content of generator sets and so on are studied. The influence of different operation modes on reservoir sediment deposition is analyzed and summarized. Through comparative analysis, some suggestions are put forward for reservoir sediment operation scheme. Among the two operation modes, the second is reservoir operation for 100 years, and the other is to keep low water level in flood season. The silt delta is pushed to the front of the dam, the silt in the tail of the reservoir is basically no silt, the total amount of siltation is relatively small, and the reservoir capacity is large, which is the recommended scheme in this paper.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TV145;TV149.2

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本文編號：1545511