| 摘要: |
| 本文利用高频变化的实际气象数据, 在考虑波浪作用的前提下利用FVCOM (Finite-volume Coastal Ocean Model)模式模拟了太湖底泥再悬浮的情况。模拟结果表明, FVCOM模式在考虑波浪作用下对太湖悬浮物浓度的模拟结果与卫星反演结果吻合较好。在模拟时刻, 湖心区和西南湖区是悬浮物浓度的大值区, 其原因在于: 湖心区虽然底泥较少, 但其流场的分布总是有利于周围悬浮物向湖心区输送; 而西南湖区本身有底泥的分布, 在上升运动和流场的配合下, 一方面有悬浮物向该区域输送, 另一方面该区域有沉积物悬浮。模拟时刻切应力和悬浮物浓度的空间配置是不一致的, 说明了底部切应力并不是影响悬浮物浓度的唯一因子, 还与湖流的输移和底泥的分布有关。 |
| 关键词: FVCOM (Finite-volume Coastal Ocean Model)模式 波浪 悬浮物浓度 |
| DOI：10.11693/hyhz201306002 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目, 41371222 号; 江苏省2011年度普通高校研究生科研创新计划项目, CXZZ11_0605 号。 |
附件 |
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| MODEL SIMULATION OF SUSPENDED SOLIDS IN TAIHU LAKE UNDER REAL METEOROLOGICAL CONDITION |
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QIU Hui1, ZHAO Qiao-Hua2, ZHU Wei-Jun3
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1.College of Atmospheric Science, Nanjing University of Information Science and Technology. Bareau of Hydro logy, Changjiang Water Resources Commission;2.College of Remote Sensing, Nanjing University of Information Science and Technology;3.College of Atmospheric Science, Nanjing University of Information Science and Technology
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| Abstract: |
| To understand the sediment resuspension in Taihu Lake, we simulated the case with the real meterological data in the FVCOM model in wave condition. Results agree well with the satellite retrieval. Two areas of high-concentration sediment were found in the central and southwestern parts of the lake, due to sediment transport by centripetal flow field, and due to the combination of upwelling and lateral sediment transportation, respectively. However, inconsistency between the distribution of shear stress and suspended-matter concentration indicates that shear stress is not the decisive factor, but the combination with current and sediment distribution, for being cofactors. |
| Key words: FVCOM model wave sediment concentration |
