本文關(guān)鍵詞： 長江口 深水航道 橫沙東灘 促淤圈圍 滯流點(diǎn) 數(shù)學(xué)模型　出處：《同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年11期 　論文類型：期刊論文

【摘要】：滯流點(diǎn)位置的變化對河口攔門沙的形成和泥沙淤積具有極大的影響.基于MIKE3軟件建立長江口水動(dòng)力和鹽度輸運(yùn)三維數(shù)學(xué)模型,采用實(shí)測資料對模型的潮位、流速、流向和鹽度進(jìn)行驗(yàn)證.運(yùn)用驗(yàn)證好的數(shù)學(xué)模型模擬和分析長江口深水航道工程及橫沙東灘促淤圈圍工程對河口滯流點(diǎn)位置的影響,結(jié)果表明,(1)應(yīng)用改進(jìn)的近底層平均單寬通量計(jì)算公式確定滯流點(diǎn)的位置,驗(yàn)證結(jié)果良好,可以用該公式確定滯流點(diǎn)的位置;(2)深水航道工程的建設(shè)增大了水深和漲落潮流速,各汊道內(nèi)落潮流量的增加明顯高于漲潮流量的增加,且滯流點(diǎn)均向下游移動(dòng);(3)橫沙東灘促淤圈圍工程建成后,北港滯流點(diǎn)向下游移動(dòng)約5km,北槽和南槽的滯流點(diǎn)則向上游移動(dòng)約1km.
[Abstract]:The change of stagflation point position has great influence on the formation and siltation of estuarine barrier sediment. Based on MIKE3 software, a three-dimensional mathematical model of hydrodynamic and salinity transport in the Changjiang Estuary is established. The tidal level and velocity of the model were measured. The effects of Yangtze Estuary Deepwater Channel Project and Estuary silting Circle Project on the location of Estuary stagflation Point are simulated and analyzed by using the verified mathematical model and the flow direction and salinity of the Estuary are verified. 1) using the improved formula for calculating the average single wide flux near the bottom layer to determine the location of the stagflation point, the result is good, and the location of the stagnation point can be determined by the formula. (2) the construction of deep water channel increases the water depth and fluctuating tidal current velocity, and the increase of falling tide discharge in each branch is obviously higher than that of the rising tide flow, and the stagflation point moves downstream; 3) after the completion of the project, the stagnation point of Beigang moved about 5 km to the downstream, and the point of stagnation of the north channel and the south channel moved about 1 km to the upstream.
【作者單位】： 同濟(jì)大學(xué)土木工程學(xué)院;
【基金】：國家“九七三”重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2012CB957704)
【分類號(hào)】：TV148
【正文快照】： 近年來,長江口深水航道治理工程促進(jìn)了長江航運(yùn)業(yè)的發(fā)展,為長三角地區(qū)的經(jīng)濟(jì)快速發(fā)展提供了良好的條件,充分發(fā)揮了長江黃金水道的作用.隨著經(jīng)濟(jì)的快速發(fā)展,土地緊缺的問題日益突出,橫沙東灘促淤圈圍工程正在緊鑼密鼓地進(jìn)行,從而有效地緩解上海市的土地壓力,具有極大的經(jīng)濟(jì)和社，

本文編號(hào)：1483442