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太湖沉积物空间分布的动力学机制分析
引用本文:赵巧华.太湖沉积物空间分布的动力学机制分析[J].水利学报,2008,39(Z2).
作者姓名:赵巧华
作者单位:南京信息工程大学
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
摘    要:基于太湖站十年的风速风向资料,根据风向统计频率权重,利用非结构有限元的FVCOM模式,计算了太湖湖流的辐合区及垂直速度的空间分布。结果表明:太湖流场的主要辐合区集中在北部湾区、西部沿岸、东太湖湾区的北部及平台山以南的区域,东部沿岸相对较为分散;该分布与中下层的垂直速度分布基本一致;流场辐合区及下沉区的分布与太湖沉积物分布非常吻合,说明风场驱动下的流场辐合及下沉是决定太湖沉积物空间分布的关键因子之一。本研究有助于了解太湖沉积物对营养盐及水下光场空间分布的影响机理。

关 键 词:辐合    下沉区    沉积物    流场
收稿时间:5/21/2009 9:49:42 PM
修稿时间:2009/12/7 0:00:00

Analysis of dynamic mechanism on the sediment distribution in lake Taihu
Zhao Qiaohua.Analysis of dynamic mechanism on the sediment distribution in lake Taihu[J].Journal of Hydraulic Engineering,2008,39(Z2).
Authors:Zhao Qiaohua
Affiliation:Nanjing university of information science & technology
Abstract:Based on the data of wind speed , wind direction and frequency weight of wind direction for ten years in Taihu station, the spatial distribution of convergence of lake current and subsidence velocity were calculated by FVCOM mode, the results showed region of lake current in lake Taihu distributed in bays in north, western coastwise, the north of bays in east of lake Taihu and the south region of mountain Pingtai-shan. The distribution of convergence in east coastwise is relative disperse; It was consistent with the distribution of subsidence region . The distribution of convergence and subsidence region agreed with that of sediment in lake Taihu, so it is one of key factors affected the distribution of sediment that convergence and subsidence region of lake current driven by wind fields. The result is helpful to research on the mechanism which the effect of sediment on the spatial distribution of nutrient and underwater light climate in lake Taihu.
Keywords:convergence  subsidence region  sediment  flow field
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