长江河口北港北汊河势演变及趋势分析
发布时间：2019-04-24 19:23
【摘要】：在分析长江口北港北汊河段实测水文资料及1977-2013年海图基础上,研究近30多年来该河段河势演变趋势及其影响因素。结果表明:(1)历史上,北港北汊河段经历了团结沙与北港北沙的交替更迭;(2)北港北汊是一个典型的复式河槽,其上段1995-2006年以冲刷为主,2006-2013年以淤积为主;中段1995-2013年均以冲刷为主;下段变化不大。(3)洪水导致了北港北汊复式河槽格局的形成,而北槽深水航道北导堤和横沙东滩促淤圈围工程限制了北港落潮水流通过横沙东滩串沟进入北槽,进而导致北港北汊分流增加,是北港北汊发展的重要因素。
[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.
【作者单位】： 华东师范大学河口海岸学国家重点实验室;上海河口海岸科学研究中心;上海市地质调查研究院;
【基金】：国家自然科学基金(41476075)
【分类号】：P333
本文编号：2464716
[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.
【作者单位】： 华东师范大学河口海岸学国家重点实验室;上海河口海岸科学研究中心;上海市地质调查研究院;
【基金】：国家自然科学基金(41476075)
【分类号】：P333
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1 徐文晓;长江河口北港北汊河势演变及动力沉积特征分析[D];华东师范大学;2016年
，本文编号：2464716
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