Numerical Simulation on hydrodynamic environment effects of the reclamation project of Nanhui tidal flat in Yangtze Estuary
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Reclamation project is the main method of coast exploitation, and the hydrodynamic environment effect of reclamation project is significant for project’s site selection and environmental protection. In consideration of baroclinic water, a 3-D numerical model MIKE3 is applied to simulate Yangtze Estuary’s hydrodynamic environment to predict the impacts of the reclamation project of Nanhui tidal flat. The simulated results of the model agree well with the field data of tide level, current speed, current direction, temperature, salinity and water quality, and indicate that after the reclamation project, the high tide level will be lower, while the low tide level will be higher in the South Branch in general. During spring tide in dry season, the peak velocity during ebb tide in the North Channel will be reduced by 13%, while increased by 21% in the South Channel averagely. The salinity will be increased in the North Channel, while reduced in the South Passage, besides, the reclamation project will aggravate the saltwater intrusion of the North Branch. The value of N/P will be increased by about 4% in the whole South Branch except the North Channel, which will result in a slight aggravation of the phosphorus restriction effect in Yangtze Estuary.
Key wordsYangtze Estuary 3-D numerical model hydrodynamics nutrients reclamation project
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- Huai W. X., Komatsu T., Zeng X. H. Numerical simulation of residual circulation due to bottom roughness variability under tidal flows in a semi–enclosed bay [J]. China Ocean Engineering, 2005, 19(4): 601–612.Google Scholar
- Liu Z. J., Hashim N. B., Kingery W. L. et al. Hydrodynamic Modeling of St. Louis Bay Estuary and Watershed Using EFDC and HSPF [J]. Journal of Coastal Research, 2016, 52(Fall 2008): 107–116.Google Scholar
- Passeri D. L., Hagen S. C., Medeiros S. C. et al. Impacts of historic morphology and sea level rise on tidal hydrodynamics in a microtidal estuary (Gran. Bay, Mississippi) [J]. Continental Shelf Research, 2015, 111(Part B): 150–158.Google Scholar
- Dai Z. J., Chu A., Li W. H. et al. Has Suspended Sediment Concentration Near the Mouth Bar of the Yangtze (Changjiang) Estuary Been Declining in Recent Years? [J]. Journal of Coastal Research, 2017, 29(4): 809–818.Google Scholar
- Li H. L., Chen J. F., Lu Y. et al. Seasonal variation of DO and formation mechanism of bottom water hypoxia of Changjiang River Estuary [J]. Journal of Marine Sciences, 2011, 29(3): 78–87(in Chinese).Google Scholar
- Wang K., Chen J. F., Jin H. Y. et al. The four seasons nutrients distribution in Changjiang River Estuary and its adjacent East China Sea [J]. Journal of Marine Sciences, 2011, 29(3): 18–35(in Chinese).Google Scholar
- Chai C. Study on the status and characteristics of eutrophication in th. Yangtze River Estuary [D]. Doctoral Thesis, Qingdao, China: Institute of Oceanology, Chinese Academy of Sciences, 2006(in Chinese).Google Scholar
- Fang T. Effects of irradiance, Nitrate an. Phosphate on growth of phytoplankton in Changjiang Estuary [D]. Doctoral Thesis, Shanghai, China: East China Normal University, 2008(in Chinese)Google Scholar