Abstract
The south to the north project (WDP) on the saltwater intrusion in the Changjiang Estuary is studied by the improved three-dimensional (3D) numerical model. The net unit width flux in the Changjiang Estuary as well as the sectional salt flux is calculated in the North Branch (NB), the South Branch (SB), the North Channel (NC), the South Channel (SC), the North Passage (NP) and the South Passage (SP), respectively. The net seaward water flux in the SB is reduced, and the net water flux spilling over from the NB to the SB is enhanced after the eastern WDP. Under the mean river discharge condition in the dry season, the net salt flux spilling over from the NB to the SB is increased by 2.09 t/s and 0.52 t/s during the spring and neap tides, respectively, due to the eastern WDP. The saltwater intrusion in the Changjiang Estuary is enhanced by the eastern WDP. Compared with that during the spring tide, the net water diversion ratio during the neap tide in the NC is smaller, and thus the enhancement of the saltwater intrusion by the eastern WDP is smaller in the NC, and larger in the NP and the SP. The tidally averaged surface salinity at the water intakes of the Dongfengxisha Reservoir, the Chenhang Reservoir and the Qingcaosha Reservoir rises both during the spring and neap tides.
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References
Brockway R, Bowers D, Hoguane A, et al. 2006. A note on salt intrusion in funnel-shaped estuaries: application to the Incomati Estuary, Mozambique. Estuarine, Coastal and Shelf Science, 66: 1–5
Chen Bingrui, Zhu Jianrong, Fu Lihui. 2010. Formation mechanism of the freshwater zone around the Meimao Sandbank in the Changjiang Estuary. Chinese Journal of Oceanology and Limnology, 28(16): 1329–1339
Gillibrand P A, Balls P W. 1998. Modeling salt intrusion and nitrate concentrations in the Ythan Estuary. Estuarine, Coastal and Shelf Science, 47: 695–706
Gu Yuliang, Wu Shoupei, Le Qin. 2003. Impact of intruded saline water via north branch of the Yangtze River on water source areas in the estuary area. Yangtze River (in Chinese), 2003(4): 1–3
Han Naibin. 1983. Analysis of chlorinity in the South Branch of Changjiang Estuary. Journal of Nanjing Hydraulic Research Institute (in Chinese), 1: 74–81
Lerczak J A, Geyer W R. 2006. Mechanisms driving the time-dependent salt flux in a partially stratified estuary. Journal of Physical Oceanography, 36: 2296–2311
Li Lu, Zhu Jianrong, Wu Hui, et al. 2010. A numerical study on the water diversion ratio of the Changjiang Estuary in the dry season. Chinese Journal of Oceanology and Limnology, 28(3): 700–712
Liu Gaofeng, Zhu Jianrong, Wang Yuanye, et al. 2010. Tripod measured residual currents and sediment flux: impacts on the silting of the deepwater Navigation channel in the Changjiang Estuary. Estuarine, Coastal and Shelf Science, 73: 210–225
Mao Zhichang, Shen Huanting, Xiao Chengyou. 2001. Saltwater intrusion patterns in the Qingcaosha area changing river estuary. Oceanologia et Liminologia Sinica (in Chinese), 32(1): 58–66
McManus J. 2005. Salinity and suspended matter variations in the Tay Estuary. Continental Shelf Research, 25: 729–747
Milnes E, Renard P. 2004. The problem of salt recycling and seawater intrsion in coastal irrigated plains: an example from the Kiti aquifer (Southern Cyprus). Journal of Hydrology, 288: 327–343
Ocean Atlas Commission. 1992. Ocean Atlas in Bohai Sea, Huanghai Sea and East China Sea (Hydrology) (in Chinese). Beijing: China Ocean Press, 13–168
Shen Huanting, Mao Zhichang, Gu Yuliang. 2002. Impact of south-north water transfer (East Route) on saltwater intrusion in the Changjiang Estuary with consideration of its countermeasures. Resources and Environment in the Yangtze Basin (in Chinese), 11(2): 150–154
Shen Huanting, Mao Zhichang, Zhu Jianrong. 2003. Saltwater Intrusion in the Changjiang Estuary (in Chinese). Beijing: China Ocean Press, 15–74
Sierra J P, Sanchez-Arcilla A, Figueras P A, et al. 2004. Effects of discharge reductions on salt wedge dynamics of the Ebro River. River Research and Applications, 20: 61–77
Song Yonggang, Zhu Jianrong, Wu Hui. 2010. Spatial and temporal variations and mechanism of the tidal level and tidal range in the North Branch of the Changjiang Estuary. Journal of East China Normal University: Natural Science (in Chinese), 6: 10–19.
Turrell W R, Brown J, Simpson J H. 1996. Salt intrusion and secondary flow in a shallow, well-mixed estuary. Estuarine, Coastal and Shelf Science, 42: 153–169
Wu Hui, Zhu Jianrong. 2007. Analysis of the transport mechanism of the saltwater spilling over from the North Branch in the Changjiang Estuary in China. Acta Oceanologica Sinica (in Chinese), 29(1): 17–25
Wu Hui, Zhu Jianrong. 2010. Advection scheme with 3rd high-order spatial interpolation at the middle temporal level and its application to saltwater intrusion in the Changjiang Estuary. Ocean Modeling, 33: 31–51
Wu Hui, Zhu Jianrong, Chen Bingrui, et al. 2006. Quantitative relationship of runoff and tide to saltwater spilling over from the North Branch in the Changjiang Estuary: a numerical study. Estuarine, Coastal and Shelf Science, 69: 125–132
Wu Hui, Zhu Jianrong, Choi, B H. 2010. Links between saltwater intrusion and subtidal circulation in the Changjiang Estuary: a model-guided study. Continental Shelf Research, 30: 1891–1905
Xiang Yinyu, Zhu Jianrong, Wu Hui. 2009. The impact of the shelf circulations on the saltwater intrusion in the Changjiang Estuary in winter. Progress in Natural Science (in Chinese), 19(2): 192–202
Xiao Chengyou, Zhu Jianrong, Shen Huanting. 2000. Study of numerical modeling about saltwater flow backward in the Changjiang Estuary North Branch. Acta Oceanologica Sinica (in Chinese), 22(5): 124–132
Xu Jianyi, Yuan Jianzhong. 1994. Study on the mechanism of saltwater intrusion in the South Branch in the Changjiang Estuary. Hydrography (in Chinese), 83(5): 1–6
Zhu Jianrong. 2003. Ocean Numerical Calculation Method and Numerical Model (in Chinese). Beijing: China Ocean Press, 72–126
Zhu Jianrong, Fu Lihui, Wu Hui. 2008. Impact of wind stress and Coriolis Force on the freshwater zone near Meimaosha in the Changjiang Estuary. Journal of East China Normal University:Natural Science (in Chinese), 6: 1–8, 39
Zhu Jianrong, Wu Hui, Li Lu, et al. 2010. Saltwater intrusion in the Changjiang Estuary in the extremely drought hydrological year 2006. Journal of East China Normal University: Natural Science (in Chinese), 4: 1–6, 25
Zhu Jianrong, Zhu Shouxian. 2003. Improvement of the ECOM with application to the Changjiang River Estuary, Hangzhou Bay and adjacent waters. Oceanologia et Liminologia Sinica (in Chinese), 34(4): 364–374
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Foundation item: The National Basic Science Research Program of Global Change Research of China under contract No. 2010CB951201; the Funds for Creative Research Groups of China under contract No. 41021064; the National Natural Science Foundation of China under contract No. 40976056.
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Xu, K., Zhu, J. & Gu, Y. Impact of the eastern water diversion from the south to the north project on the saltwater intrusion in the Changjiang Estuary in China. Acta Oceanol. Sin. 31, 47–58 (2012). https://doi.org/10.1007/s13131-012-0205-0
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DOI: https://doi.org/10.1007/s13131-012-0205-0