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《Journal of Hydroelectric Engineering》 2012-04
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Environmental water demand of Qiantang estuary considering tide fluctuations

YOU Aiju,LI Ruohua,HAN Zengcui,ZHU Junzheng(Zhejiang Institute of Hydraulics and Estuary,Hangzhou 310020)  
Water quality deterioration is now becoming a widespread problem of most estuaries as an increasing amount of waste water is discharged while the control of total maximum load is lagging.Water quality of Qiantang estuary is significantly influenced by tidal fluctuations,particularly,by strong fortnightly tides.This paper puts forward three criteria of water quality evaluation for tidal estuaries and presents a simulation of environmental water demand 310m3/s of the study reach with a 2D water quality model.A further study on water quality control measures shows that by discharging 30% more in spring tide and 30% less in neap,the peak concentration is much depressed,the period of supply-demand balance is extended,and therefore the demand can be reduced by 10%.
【Fund】: 国家水体污染控制与治理科技重大专项(2009ZX07424-001);; 水利部公益性行业科研专项经费项目(200801072);; 浙江省自然科学基金项目(Y5080219);; 浙江省公益技术研究社会发展项目(2010C33077)
【CateGory Index】: X52
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