【摘要】 用数值模拟的方法研究了太湖水体中TP分布特征及湖流对其影响．推导、建立了一包括平流、水平扩散、沉降和底泥释放的浅水湖泊中污染物（TP）浓度分布计算的二维迎风有限元数值模式，并在给定若干点源条件下计算各种稳态流场下太湖水体中的TP分布．初步揭示了其分布特征及影响因素，探讨了湖流对太湖水体中污染物（TP）输移扩散过程的影响更多还原

【Abstract】 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.更多还原