The self-regulation process and its mechanism of channels-bed changes in the Changjiang (Yangtze) Estuary in China

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• 作者：Xiaohe Zhang ; Jiufa Li ; Wenwu Zhu ; Heqin Cheng ; Wei Chen
• 关键词：Changjiang Estuary ; bathymetric changes ; self ; regulation ; human activities ; tidal current ; sediment transport
• 刊名：Acta Oceanologica Sinica
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：34
• 期：7
• 页码：123-130
• 全文大小：2,098 KB
• 参考文献：Changjiang Water Resources Commission. Changjiang Sediment Bulletin. Beijing: China Water Power Press, 2005
  Chen Jiyu, Yun Caixing, Xu Haigen, et al. 1979. The developmental model of the Chang Jiang River Estuary during last 2000 years. Haiyang Xuebao (in Chinese), 1(1): 103-11
  Dai Zhijun, Du Zinzhou, Chu Ao, et al. 2011. Sediment characteristics in the North Branch of the Yangtze Estuary based on radioisotope tracers. Environmental Earth Sciences, 62(8): 1629-634, doi: 10.1007/S12665-010-0647-7View Article
  Dai Zhijun, Liu J T, Fu Gui, et al. 2013. A thirteen-year record of bathymetric changes in the North Passage, Changjiang (Yangtze) estuary. Geomophology, 187: 101-07View Article
  Feng Lingxuan, Li Jiufa, Dai Zhijun, et al. 2009. Analysis of river channel stability and the characteristics of suspended sediment and water in the North Branch of the Changjiang River Estuary in recent years. Journal of Marine Sciences (in Chinese), 27(3): 40-7
  Feng Lingxuan, Li Jiufa, Liu Xincheng, et al. 2012. Morphological evolution of diffluence pass of South Passage and North Passage in Yangtze Estuary and its response to diversion works. Journal of Sediment Research (in Chinese), (6): 39-5
  He Yufang, Cheng Heqin, Chen Jiyu. 2011. Morphological evolution of mouth bars of the Yangtze Estuarine waterways in the last 100 years. Acta Geographica Sinica (in Chinese), 66(3): 305-12
  Jiang Chenjuan, de Swart H E, Li Jiufa, et al. 2013. Mechanisms of along-channel sediment transport in the North Passage of the Yangtze estuary and their response to large-scale interventions. Ocean Dynamics, 63(2-): 283-05View Article
  Jiang Chenjuan, Li Jiufa, de Swart H E. 2012. Effects of navigational works on morphological changes in the bar area of the Yangtze Estuary. Geomorphology, 139-40: 205-19View Article
  Jiang Chenjuan, Li Jiufa, Wu Hualin, et al. 2013. Effects of the deep waterway project on the characteristics of hydrodynamics and sediment dynamics in the North Passage of the Changjiang Estuary. Haiyang Xuebao (in Chinese), 35(4): 129-41
  Lane A. 2004. Bathymetric evolution of the Mersey Estuary, UK, 1906-997: causes and effects. Estuarine, Coastal and Shelf Science, 59(2): 249-63View Article
  Li Maotian, Cheng Heqin, Zhou Fengnian, et al. 2011. The effect of sand digging to bedfrom stability of the Nangang Channel in the Changjiang River mouth. Hydrographic Surveying and Charting (in Chinese), 31(1): 50-3
  Li Jiufa, Li Zhanhai, Yao Hongyi, et al. 2013. Study on the Sediment Properties and Resuspension in the South Branch in the Changjiang Estuary (in Chinese). Beijing: China Ocean Press, 1196-200
  Li Jiufa, Zhang Chen. 1998. Sediment resuspension and implications for turbidity maximum in the Changjiang Estuary. Marine Geology, 148(3-): 117-24View Article
  Liu jie, Le Jiahai, Hu Zhifeng, et al. 2003. The influence on the north passage bar after executing the first phase regulation project of the Yangtze Estuary. The Ocean Engineering (in Chinese), 21(2): 58-4
  Pan Lingzhi, Ding Pingxing, Ge Jianzhong, et al. 2011. Analysis of influence of deep waterway project on morphological change in North passage of Changjiang estuary. Journal of Sediment Research (in Chinese), (5): 51-9
  Qian Ning, Zhang Ren, Li Jiufa, et al. 1981. A preliminary study on the mechanism of selfregulation of sediment transport capacity in the lower Huang He (the Yellow River). Acta Geographica Sinica (in Chinese), 36(2): 143-56
  Roelvink J A. 2006. Coastal morphodynamic evolution techniques. Coastal Engineering, 53(2-): 277-87View Article
  Shen Huanting, Pan Dingan. 2011. Turbidity Maximum in the Changjiang Estuary (in Chinese). Beijing: China Ocean Press
  Song Zekun, Cheng Heqin, Hu Hao, et al. 2012. Numerical simulation analysis of influence of reclamation of north branch in the Yangtze River estuary on hydrodynamic characteristics. Yangtze River (in Chinese), 43(15): 59-3
  Syvitski J P M, V?r?smarty C J, Kettner A J, et al. 2005. Impact of humans on the flux of terrestrial sediment to the global coastal ocean. Science, 308(5720): 376-80View Article
  Tambroni N, Pittaluga M B, Seminara G. 2005. Laboratory observations of the morphodynamic evolution of tidal channels and tidal inlets. Journal of Geophysical Research, 110(F4): doi: 10.1029/2004JF000243
  Walling D E. 2006. Human impact on land-ocean sediment transfer by the world’s rivers. Geomorphology, 79(3-): 192-16View Article
  Wang Yonghong, Dong Ping, Oguchic T, et al. 2013. Long-term (1842-006) morphological change and equilibrium state of the Changjiang (Yangtze) Estuary, China. Continental Shelf Research, 56: 71-1View Article
  Yang Shilun, Shi Zhong, Zhao Huayun, et al. 2004. Effects of human activities on the Yangtze River suspended sediment flux into the estuary in the last century. Hydrology and Earth System Sciences, 8(6): 1210-216View Article
  Zhou Xiaoyan, Zheng Jinhai, Doong D J, et al. 2013. Sea level rise
• 作者单位：Xiaohe Zhang (1)
  Jiufa Li (1)
  Wenwu Zhu (1)
  Heqin Cheng (1)
  Wei Chen (2)
  
  1. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200062, China
  2. Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, 3584 CC, the Netherlands
  
• 刊物主题：Oceanography; Climatology; Ecology; Engineering Fluid Dynamics; Marine & Freshwater Sciences; Environmental Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1869-1099

文摘

Recent bathymetric changes in the Changjiang Estuary under the influence of artificial regulation engineerings and basin reservoirs have been analyzed based on the maritime charts since 1997 and recent fieldworks. The results indicate a slight erosion of the channels in the upper and middle estuary, continuing deposition and seaward move of the mouth bar crest and intensifying erosion at the nearshore seabed. It is noteworthy that the morphological evolution caused by intensive human activities dominates over the changes from nature process. First, the riverbes are eroded overall in the South Branch (SB), the South Channel (SC) and the upper and middle reaches of the North Channel (NC). The nearshore seabed outside the river mouth is being eroded slightly, which is attributed to the declining sediment supply from the Changjiang Basin due to the construction of the Three Gorges Dam upstream. The sediment above the seabed is very active and coarsened, meanwhile, sand waves are becoming more distinct. Second, a deposition occurs in the North Brach (NB), the mouth of the NC, the mouth bars of the North Passage (NP) and the South Passage (SP) and especially the main channel of the NP, where it shows a massive siltation after the deep waterway project. The reasons for the recent changes are not only the dynamic structure in estuarine mouth bars, but also the supply of sediment resuspension in a local and offshore area. Meanwhile, the severe erosion and siltation in some reaches is related to the construction of estuarine engineerings. It is indicated that the Changjiang Estuary is gradually self-adjusted and adapting to the varying natural factors and intensive human activities. The study on the mechanism of self-regulation of the recent bathymetric changes in the Changjiang Estuary has important and practical significance.