發(fā)布時(shí)間：2018-02-02 20:42

  本文關(guān)鍵詞： 異重流 支流 倒灌流量 底坡 小浪底水庫(kù)　出處：《泥沙研究》2017年01期 　論文類型：期刊論文

【摘要】：水庫(kù)異重流倒灌是造成支流淤積的重要原因,影響支流庫(kù)容可持續(xù)利用。已有的異重流倒灌流量公式在推導(dǎo)過(guò)程中均假設(shè)支流底坡為0,所計(jì)算的倒灌流量往往大于實(shí)測(cè)值。本文通過(guò)在倒灌異重流的動(dòng)量方程中加入底坡上的壓力,推導(dǎo)了考慮底坡的異重流倒灌流量公式。公式結(jié)構(gòu)形式表明在相同的口門渾水厚度與含沙量條件下,倒灌流量隨底坡增加而減小。使用小浪底水庫(kù)4條支流的異重流測(cè)驗(yàn)數(shù)據(jù)對(duì)公式進(jìn)行了驗(yàn)證。驗(yàn)證結(jié)果表明相對(duì)于不考慮底坡的倒灌流量公式,本文提出的公式計(jì)算精度更高。
[Abstract]:Gravity flow reverse irrigation is an important reason for the deposition of tributaries, which affects the sustainable utilization of tributaries. In the derivation process, the existing formulas of gravity flow backflow flow flow assume that the bottom slope of the tributaries is 0. The calculated flow rate is usually larger than the measured value. In this paper, the pressure on the bottom slope is added to the momentum equation of the gravity current. In this paper, the formula of gravity flow reverse irrigation flow considering bottom slope is derived. The formula structure shows that under the same conditions of muddy water thickness and sediment content at the same entrance. The formula is verified by using the density current test data of four tributaries of Xiaolangdi Reservoir. The results show that the formula is relative to that without considering the bottom slope. The formula presented in this paper has higher accuracy.
【作者單位】： 武漢大學(xué)水資源與水電工程科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室;黃河勘測(cè)規(guī)劃設(shè)計(jì)有限公司;黃河水利科學(xué)研究院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51379156,51309110) 水利部公益性行業(yè)科研專項(xiàng)經(jīng)費(fèi)資助項(xiàng)目(201401023) 黃河水利科學(xué)研究院中央級(jí)公益性科研院所科研業(yè)務(wù)費(fèi)專項(xiàng)(HKY-JBYW-2014-01)
【分類號(hào)】：TV145.2
【正文快照】： 當(dāng)庫(kù)區(qū)干流水體的含沙量大于支流時(shí),干流水體會(huì)以異重流的形式倒灌入支流。異重流倒灌造成的危害有很多,如水庫(kù)內(nèi)干支流交匯處發(fā)生的倒灌,容易形成倒錐體淤積,嚴(yán)重時(shí)形成攔門沙坎導(dǎo)致支流庫(kù)容損失[1,2]。官?gòu)d水庫(kù)的支流媯水河,其攔門沙坎高程從20世紀(jì)80年代中期的469m不斷淤高，

本文編號(hào)：1485425