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圍墾工程對(duì)沙枉河口污染物輸運(yùn)影響分析

發(fā)布時(shí)間:2018-05-21 18:48

  本文選題:污染物輸運(yùn) + 圍墾工程; 參考:《水利水運(yùn)工程學(xué)報(bào)》2017年02期


【摘要】:河口兩側(cè)實(shí)施圍墾工程改變了河口形態(tài)和動(dòng)力環(huán)境,對(duì)河口污染物輸運(yùn)也將產(chǎn)生一定影響。以連云港市贛榆縣沙枉河口為例,采用平面二維擴(kuò)散輸運(yùn)模型對(duì)河口兩側(cè)高灘圍墾工程實(shí)施前后沙枉河口污染物輸運(yùn)的影響范圍進(jìn)行了數(shù)值計(jì)算,分析了河口兩側(cè)淺灘圍墾工程對(duì)河口污染物輸運(yùn)范圍的影響。分析結(jié)果表明,河口兩側(cè)淺灘實(shí)施圍墾工程使得河口過(guò)流通道縮窄,具有排放口向深水遷移的效應(yīng),有利于河口受污水體向動(dòng)力較強(qiáng)的深水區(qū)稀釋;但圍墾工程實(shí)施使得通道和前沿區(qū)域動(dòng)力改變,當(dāng)兩側(cè)圍墾工程前沿水流減弱時(shí),動(dòng)力變化不利于污染物輸運(yùn);相反,圍墾工程促使前沿水流增加時(shí),動(dòng)力變化則有利于污染物輸運(yùn)。
[Abstract]:Reclamation projects on both sides of the estuary have changed the estuary shape and dynamic environment, and will also have a certain impact on the transport of pollutants in the estuary. Taking Shaqu Estuary in Ganyu County of Lianyungang City as an example, a two-dimensional plane diffusion transport model is used to numerically calculate the influence range of pollutant transport in both sides of the estuary before and after the implementation of the high beach reclamation project. The influence of the reclamation project on the transport range of pollutants in the estuary is analyzed. The results show that the reclamation project on both sides of the estuary makes the channel of estuary flow narrow, and has the effect of migration from the outlet to the deep water, which is beneficial to the dilution of the estuary in the deep water area where the sewage body is more dynamic. However, the implementation of reclamation project makes the dynamic change of channel and front area. When the front flow of both sides of reclamation project weakens, the dynamic change is not conducive to the transport of pollutants; on the contrary, when reclamation project promotes the increase of forward water flow, Dynamic change is beneficial to pollutant transport.
【作者單位】: 連云港港30萬(wàn)噸級(jí)航道建設(shè)指揮部;連云港市贛榆縣水利局;江蘇省水利廳;南京水利科學(xué)研究院;
【基金】:國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFC0401505) 國(guó)家自然科學(xué)基金資助項(xiàng)目(51309157)
【分類(lèi)號(hào)】:X52

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