【摘要】：在分析長江口北港北汊河段實(shí)測水文資料及1977-2013年海圖基礎(chǔ)上,研究近30多年來該河段河勢演變趨勢及其影響因素。結(jié)果表明:(1)歷史上,北港北汊河段經(jīng)歷了團(tuán)結(jié)沙與北港北沙的交替更迭;(2)北港北汊是一個(gè)典型的復(fù)式河槽,其上段1995-2006年以沖刷為主,2006-2013年以淤積為主;中段1995-2013年均以沖刷為主;下段變化不大。(3)洪水導(dǎo)致了北港北汊復(fù)式河槽格局的形成,而北槽深水航道北導(dǎo)堤和橫沙東灘促淤圈圍工程限制了北港落潮水流通過橫沙東灘串溝進(jìn)入北槽,進(jìn)而導(dǎo)致北港北汊分流增加,是北港北汊發(fā)展的重要因素。
[Abstract]:Based on the analysis of the measured hydrologic data and charts from 1977 to 2013 in the north branch of the North Branch of the Yangtze River Estuary, the trend of river regime evolution and its influencing factors in the last 30 years have been studied. The results show that: (1) in the history, the north branch of Beigang Port experienced the alternation of the unity sediment and the north sediment of Beigang, (2) the north branch of Beigang Port is a typical compound channel, the upper part of which is dominated by scour in 1995-2006 and siltation in 2006-2013; In the middle of 1995-2013, scour was the main year; The lower section does not change much. (3) the flood resulted in the formation of the pattern of the complex channel in the north branch of the Beigang, while the north diversion dike of the deepwater channel in the north channel and the siltation-promoting circle of the eastern beach of Hengsha restricted the tidal current in the north port to enter the north channel through the cross-channel of the eastern beach of Hengsha. Therefore, it is an important factor for the development of the north branch of Beigang to increase the diversion of the north branch of Beigang.
【作者單位】： 華東師范大學(xué)河口海岸學(xué)國家重點(diǎn)實(shí)驗(yàn)室;上海河口海岸科學(xué)研究中心;上海市地質(zhì)調(diào)查研究院;
【基金】：國家自然科學(xué)基金(41476075)
【分類號(hào)】：P333

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1 徐文曉;長江河口北港北汊河勢演變及動(dòng)力沉積特征分析[D];華東師范大學(xué);2016年

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