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《Journal of Marine Sciences》 2008-04
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The solution and application of 2D water flow and soil model on mobile bed at central city part of Fenghuajiang River

JIN De-gang,ZOU Chang-guo,YANG Cheng-gang(Ningbo Water Resources and Hydropower Planning and Design Institute,Ningbo 315192,China)  
With the development of the socio-economy and improvement of the flood control system and people's consciousness of environmental issues,the function of the river,as an important part of a city's infrastructure,is changing from previous flood propagation,storm drainage and shipping to a comprehensive system composed of flood control,traffic,ecology and tourism,which plays an important role in the sustainable development and enhancement of the competitiveness of the city.The water structure and sediment movement in the channel is one of the significant topics of study in the sustainable development of the city.Faster urbanization brings about lots of challenges for the channel improvement.Firstly,a large amount of river work has significant effect on the whole river including scouring and silting,flood propagation,storm drainage,and the stability of the river regime.Secondly,pollutant discharge has impact on the water quality,and sewage discharge index,discharge area and dilution and self-purification by the river flow itself under this index should be considered in the city planning. Thirdly,the salt water intrusion resulted from seawater downdraught caused by excessive pumping upstream would threaten the ecological environment and the residents' drinking water downstream near the estuarine area.So a good understanding of the flow condition of the river is very essential.With the central city part of the Fenghuajiang River as an example,a complete set of 2D mathematical model is built up for analyzing the evolution of the river regime and variation of scouring and silting of the tidal channel and predicting the possible change of the channel resulted from the completion of river engineering projects and their effects on drafting and discharging projects,embankment security,flood control and present or planned flood control standard and water projects,and to provide consults for the water conservancy authorities to evaluate water projects.
【Fund】: 浙江省水利厅科技研究项目(RC0517)
【CateGory Index】: TV143
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