| 风场对藻类在太湖中迁移影响的动力学研究 |
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| 引用本文： | 朱永春,蔡启铭.风场对藻类在太湖中迁移影响的动力学研究[J].湖泊科学,1997,9(2):152-158. |
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| 作者姓名： | 朱永春 蔡启铭 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所!南京210008 |
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| 基金项目： | 国家自然科学基金!39500027 |
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| 摘 要： | 在Ｗｅｂｓｔｅｒ等人工作的基础上，以三维湖流为背景，考虑了波浪及藻类自身浮力的影响，建立了一个太湖梅梁湾三维藻类迁多模型，以研究在不同几场作用下藻类在湖泊中的迁移过程。模拟结果表明，不同风场对于藻类在湖泊中的水平及垂直分布影响很大，并且存在着一临界风速，其范围在２－３ｍ／ｓ之间，当几速小于临床风速时，水面可以拟看作水动力学光滑，没有波浪产生，在水表面藻类顺着风向迅速的向迎风岸的边漂移，形成藻类大量
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| 关 键 词： | 藻类迁移 水华暴发 波浪作用 太湖 动力学 风场 |
| 收稿时间： | 3/6/1996 12:00:00 AM |
| 修稿时间： | 7/2/1996 12:00:00 AM |
The Dynamic Research of The influence of Wind Field on The Migration of Algae in Taihu Lake |
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| Zhu Yongchun and Cai Qiming.The Dynamic Research of The influence of Wind Field on The Migration of Algae in Taihu Lake[J].Journal of Lake Science,1997,9(2):152-158. |
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| Authors: | Zhu Yongchun and Cai Qiming |
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| Institution: | Ninjing institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008 and Ninjing institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008 |
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| Abstract: | A three-dimensional model in which the effects of buoyance and wave are considered is developed to demonstrate how the tendency of algae to move, coupled with wind-induced circulation, leads to horizontal and vertical heterogeneity in algae concentration in Taihu Lake. Results show that the distribution of algae will be different depending on whether the windspeed is higher or lower than the critical windspeed. If the windspeed is lower than the critical one,algae may migrate toward the downwind end of the lake and accumulate there. The floating algae are expected to remain on the surface. But above the critical windspeed, water surface becomes rough and waves take place. In that case, interactions between wind-generated turbulence. mean currents and waves cause algae to leave away from the water surface, so surface accumulation of algae do not occur again. In summer, the algae of Taihu Lake migrate with southeast wind toward the northwest region of the lake and then form blooming there for low windspeed; but when the windspeed above the critical value, the wind-generated waves may impress the accumulation of algae and make algae distribute more uniformly in the lake. This result is verified by the observed data of Taihu Lake. |
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| Keywords: | the migration of algae wind-generated waves critical windspeed Taihu Lake |
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