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《Journal of Lake Science》 1997-04
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NUMERICAL STUDY ON THE DISTRIBUTION OF TP IN TAIHU LAKE AND THE IMPACT FROM LAKE CURRENT

Ma Shengwei;Cai Qiming(Yunnan Institute of Environmental Science, Kunming 650034)(Nanjing Institute of Geography & Limnnology, Chinese Academy of Sciences,Kanjing 210008)  
A new upwinding finite element numerical model, which is two-dimensional and suitable for calculating concentrations of total phosphorus (TP) in shallow lakes considering major controlling factors of a dvection, dispersion, deposition and releasing from bottom, is derived. Moreover it is used in the research on the characteristics and effecting factors of TP distribution in Taihu Lake. Main results are:(1) The model presented is reasonable, valid and cost-effective;(2) Lake current produces certain impact on TP distribution in Taihu Lake. In general.the flow patterns dominated by anticlockwise circulation with a higher speed (velocity) are more beneficial to TP transportation and dispersion process;(3) The ability of diluting purification of the open water in Taihu Lake is much stronger than that of Melliang Bay;(4) Major factors affecting TP concentration are different from region to region in Taihu Lake briefly. in the waterfield to the west of the line of Daojiao Hill-Dalei Hill-Xingtang.the major controlling factors are hydraulic transportation and dispersion, and to the east of the line of Manshan Island-West Hill-Zheshan Hill it is the releasing from the bottom sediment.
【Fund】: 国家自然科学基金!49171017
【CateGory Index】: P593
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