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

【摘要】：水庫異重流倒灌是造成支流淤積的重要原因,影響支流庫容可持續(xù)利用。已有的異重流倒灌流量公式在推導(dǎo)過程中均假設(shè)支流底坡為0,所計算的倒灌流量往往大于實測值。本文通過在倒灌異重流的動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4條支流的異重流測驗數(shù)據(jù)對公式進行了驗證。驗證結(jié)果表明相對于不考慮底坡的倒灌流量公式,本文提出的公式計算精度更高。
[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)國家重點實驗室;黃河勘測規(guī)劃設(shè)計有限公司;黃河水利科學(xué)研究院;
【基金】：國家自然科學(xué)基金資助項目(51379156,51309110) 水利部公益性行業(yè)科研專項經(jīng)費資助項目(201401023) 黃河水利科學(xué)研究院中央級公益性科研院所科研業(yè)務(wù)費專項(HKY-JBYW-2014-01)
【分類號】：TV145.2
【正文快照】： 當(dāng)庫區(qū)干流水體的含沙量大于支流時,干流水體會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)重時形成攔門沙坎導(dǎo)致支流庫容損失[1,2]。官廳水庫的支流媯水河,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：1485425