本文選題：龍口灣 + 數(shù)值模擬　； 參考：《大連理工大學(xué)》2016年碩士論文

【摘要】：建設(shè)大型人工島(群)是開發(fā)利用海洋空間資源、拓展我國濱海城市發(fā)展空間的重要方式,而不合理的工程建設(shè)規(guī)劃將會導(dǎo)致自然岸線破壞,海洋環(huán)境惡化等問題,因此研究對海洋動力條件和地形地貌的影響較小的大型離岸人工島(群)合理的分階段建設(shè)方案具有重要的實踐指導(dǎo)意義。本文以目前山東半島龍口灣正在興建的由龍口人工島群和招遠(yuǎn)人工島群組成的我國最大離岸人工島群為研究對象,利用MKE21軟件建立龍口灣人工島群附近海域潮流泥沙數(shù)學(xué)模型和水體交換數(shù)學(xué)模型。在模型經(jīng)過實測資料驗證的基礎(chǔ)上,模擬分析了只建成龍口人工島群工況對潮流場和泥沙沖淤變化的影響,龍口人工島群建成后、招遠(yuǎn)人工島群的4種分期建設(shè)工況對潮流場和泥沙沖淤變化的影響,以及整體人工島群水道內(nèi)水體交換情況,并從海洋動力與水質(zhì)交換角度比較分析了人工島群分期建設(shè)的優(yōu)化方案。結(jié)果表明：人工島群分期建設(shè)中,先期建設(shè)的人工島群會引起附近海域的海底地形和海洋動力環(huán)境條件發(fā)生較大的改變,因而后期人工島群相隔一定時間建成后的附近海域地形沖淤演變不同于兩部分人工島群整體建設(shè)方案。在龍口部分人工島群建成后、招遠(yuǎn)部分人工島群分階段建設(shè)過程中,綜合考慮整體島群水道內(nèi)和臨海外圍海域的流場及泥沙沖淤變化情況,分期間隔較長的方案為優(yōu)選方案。鑒于人工島群整體建設(shè)與分期建設(shè)對周邊海域水沙環(huán)境的影響不同,實際工程中可綜合海洋動力條件和水質(zhì)交換條件的改變情況科學(xué)制定分期建設(shè)方案,盡量減少對海洋環(huán)境的影響。
[Abstract]:The construction of large artificial islands (groups) is an important way to develop and utilize marine space resources and expand the development space of coastal cities in China. Unreasonable engineering construction planning will lead to the destruction of natural shoreline and the deterioration of marine environment, etc. Therefore, it is of great practical significance to study the reasonable phased construction of large offshore artificial islands (groups) with less influence on marine dynamic conditions and landforms. In this paper, the largest offshore artificial island group in China, composed of Longkou artificial island group and Zhaoyuan artificial island group, which is under construction in Longkou Bay, Shandong Peninsula, is taken as the research object. A mathematical model of tidal current and sediment and a mathematical model of water body exchange in the waters near the artificial islands in Longkou Bay were established by using MKE21 software. On the basis of the model verified by the measured data, the effect of the condition of only built Longkou artificial island group on the tidal current field and sediment scouring and silting change is simulated and analyzed. After the completion of the Longkou artificial island group, The effects of four stages of construction conditions of Zhaoyuan artificial island group on tidal current field and sediment scour and siltation, as well as the water exchange situation in the whole artificial island group waterway, From the point of view of ocean power and water quality exchange, the optimization scheme of artificial island group construction by stages is compared and analyzed. The results show that in the construction of artificial island group by stages, the pre-built artificial island group will cause great changes in the sea floor topography and marine dynamic environmental conditions in the nearby sea area. Therefore, the evolution of topography in the surrounding sea area after completion of artificial island group in the later stage is different from the whole construction plan of two parts of artificial island group. After the completion of some artificial islands in Longkou and Zhaoyuan artificial islands, the flow field and sediment scour and siltation in the waterway of the whole island group and the surrounding sea area of the whole island group are considered synthetically. The scheme with a long interval is the optimal selection scheme. In view of the different effects of the artificial island group construction and the phased construction on the surrounding sea water and sediment environment, it is possible to scientifically formulate the phased construction plan in practical engineering by synthesizing the changes of the marine dynamic conditions and the water quality exchange conditions. Minimize the impact on the marine environment.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：P756.8;P731

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