【摘要】：依據(jù)南水北調(diào)中線干渠資料,開展了正常輸水情況下串聯(lián)明渠內(nèi)可溶污染物濃度分布規(guī)律數(shù)值模擬研究。采用數(shù)值模擬、數(shù)學(xué)歸納和統(tǒng)計(jì)分析方法,提出表征污染物輸移擴(kuò)散特征的峰值輸移距離、污染帶長(zhǎng)度和峰值濃度的快速預(yù)測(cè)公式;通過示范工程驗(yàn)證了快速預(yù)測(cè)公式的可行性。結(jié)果表明:1串聯(lián)明渠內(nèi),峰值輸移距離隨渠道流速減小而減小,并且污染帶長(zhǎng)度增加值隨明渠內(nèi)流速減小而減小,但是峰值濃度隨明渠流速減小而增加;2快速預(yù)測(cè)公式計(jì)算結(jié)果與現(xiàn)場(chǎng)試驗(yàn)實(shí)測(cè)結(jié)果的誤差均不到15%,證明了快速預(yù)測(cè)公式的合理性和可行性。這些研究結(jié)果為南水北調(diào)中線工程突發(fā)可溶性水污染事件應(yīng)急預(yù)警方案的制定提供了科學(xué)依據(jù)。
[Abstract]:Based on the data of the central route of South-to-North Water transfer Project, a numerical simulation study was carried out on the distribution of soluble pollutants in a series open channel under normal water conveyance. By means of numerical simulation, mathematical induction and statistical analysis, the fast prediction formulas of peak transport distance, length of pollution zone and peak concentration are proposed to characterize the characteristics of pollutant transport and diffusion. The feasibility of the fast prediction formula is verified by demonstration project. The results show that: 1 in the series open channel, the peak transport distance decreases with the decrease of the channel velocity, and the increase of the length of the pollution zone decreases with the decrease of the flow velocity in the open channel. However, the peak concentration increases with the decrease of the open channel velocity, and the error between the calculation results of the fast prediction formula and the field test results is less than 15, which proves the rationality and feasibility of the fast prediction formula. These results provide a scientific basis for the formulation of the emergency and early warning scheme for the sudden and soluble water pollution events in the middle route of South-to-North Water transfer Project.
【作者單位】： 天津大學(xué)水利工程仿真與安全國(guó)家重點(diǎn)實(shí)驗(yàn)室;北京市勘察設(shè)計(jì)研究院有限公司;
【基金】：國(guó)家科技重大專項(xiàng)基金資助項(xiàng)目(2012ZX07205005) 天津市應(yīng)用基礎(chǔ)與前沿技術(shù)研究計(jì)劃自然科學(xué)基金重點(diǎn)項(xiàng)目(13JCZDJC36200)~~
【分類號(hào)】：X52

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