本文選題：寧夏黃河　切入點(diǎn)：干流　出處：《泥沙研究》2016年04期

【摘要】：分別采用沙量平衡法和斷面法計(jì)算寧夏黃河干流和干支流交匯處的沖淤量,以劉家峽、青銅峽水庫運(yùn)行前(1951-1968年)、劉家峽、青銅峽水庫運(yùn)行后(1969-1985年)、龍劉聯(lián)合運(yùn)用(1986-2005年)和近期(2006-2011年)四個(gè)階段對(duì)干流的沖淤變化進(jìn)行了研究,對(duì)干支流交匯處1993-2015年歷次實(shí)測大斷面資料進(jìn)行套繪,分析了1993-2015年干支流交匯處的斷面特征變化以及干、支流不同水沙組合對(duì)干流和干支流交匯處沖淤的影響。分析結(jié)果表明:寧夏黃河干流年均來沙系數(shù)越大,干流河床淤積越嚴(yán)重,但支流來沙量的增大對(duì)干流河床沖淤的影響不大;干支流交匯處年均全斷面沖淤量與干流年均來沙系數(shù)無明顯相關(guān)關(guān)系;支流年均來沙系數(shù)越大,干支流交匯處斷面反而沖刷越嚴(yán)重。
[Abstract]:The sediment balance method and cross-section method were used to calculate the scour and deposition volume at the junction of the main and tributaries of the Yellow River in Ningxia. Before the operation of the Liujiaxia and Qingtongxia reservoirs, the amount of scour and siltation was calculated in the Liujiaxia and Qingtongxia reservoirs from 1951 to 1968, respectively.After operation of Qingtongxia Reservoir (1969-1985), Long-Liu combined use (1986-2005) and recent "2006-2011"), the change of scour and siltation of the main stream was studied, and the major cross-section data of the junction of the trunk and tributaries from 1993 to 2015 were set up.The change of cross section characteristics of the main tributaries from 1993 to 2015 and the influence of different combination of water and sediment on the erosion and deposition of the main stream and the main tributaries are analyzed.The results show that the greater the annual sediment coefficient of the main stream of the Yellow River in Ningxia, the more serious the deposition of the main stream bed, but the increase of the amount of sediment coming from the tributaries has little effect on the erosion and deposition of the river bed of the main stream.There is no obvious correlation between the average annual scour and siltation amount of the whole section of the main tributaries and the average annual sediment coefficient of the main stream, but the greater the average annual sediment coefficient of the tributaries, the more serious the erosion of the cross sections of the tributaries.
【作者單位】： 天津大學(xué)水利工程仿真與安全國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金創(chuàng)新研究群體科學(xué)基金資助項(xiàng)目(51321065)
【分類號(hào)】：TV147

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3 陳s，

本文編號(hào)：1729895