本文關(guān)鍵詞： 阿爾塔什水庫(kù) 泥沙 淤積形態(tài) 淤積量 過(guò)機(jī)含沙量 物理模型試驗(yàn)　出處：《天津大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)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(kù)多年平均入庫(kù)懸移質(zhì)輸沙量為2993萬(wàn)t，多年平均入庫(kù)推移質(zhì)輸沙量為385萬(wàn)t，庫(kù)沙比為86.06，屬于泥沙問(wèn)題比較嚴(yán)重的水庫(kù)。 本文結(jié)合阿爾塔什水庫(kù)，采用物理模型試驗(yàn)，水平比尺L500，垂向比尺H100。懸移質(zhì)泥沙按照沉降相似準(zhǔn)則設(shè)計(jì)模型沙級(jí)配，同時(shí)進(jìn)行揚(yáng)動(dòng)流速相似的校核；推移質(zhì)泥沙按照起動(dòng)流速相似準(zhǔn)則設(shè)計(jì)模型沙級(jí)配。 針對(duì)兩種水庫(kù)泥沙調(diào)度運(yùn)行方式，研究了水庫(kù)泥沙淤積演變過(guò)程、各特征庫(kù)容的淤積量、發(fā)電機(jī)組的過(guò)機(jī)含沙量等，，分析總結(jié)了不同運(yùn)行方式對(duì)水庫(kù)泥沙淤積的影響。通過(guò)對(duì)比分析，為水庫(kù)的泥沙調(diào)度運(yùn)行方案提出建議。兩種運(yùn)行方式中，運(yùn)行方式二，水庫(kù)運(yùn)行100年，汛期保持低水位運(yùn)行，淤積三角洲推進(jìn)至壩前，庫(kù)尾泥沙基本無(wú)淤積，淤積總量相對(duì)較小，興利庫(kù)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(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TV145;TV149.2

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