| 摘要: |
| 通过海洋动力学和赤潮生物动力学相结合的方法，建立了一个赤潮发生的仿真模型。模型包括水动力、扩散和生物动力学三部分，综合考虑了潮流、营养物质等环境要素的时空变化对赤潮过程的影响，并以大鹏湾夜光藻赤潮为例进行了数值模拟。模型再现了赤潮发生前海水中营养物质浓度有一次明显的增高，而在赤潮发育盛期营养物质浓度降至低谷的现象；并反映了赤潮物质容易在海湾的角落等水交换不畅的地域聚集的情况。 |
| 关键词: 赤潮 仿真模型 大鹏湾 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，9389008号 |
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| AN ECOLOGICAL SIMULATION MODEL OF RED TIDE IN DAPENG BAY |
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Xia Zongwan1, Yu Bin1, Shi Jianhui1, Wang Shousong2
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1.South China Sea Branch, SOA, Guangzhou 510300;2.Mathematics Department,Zhongshan University, Guangzhou 510275
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| Abstract: |
| This ecological simulation model of red tide includes water and biological dynamics, and takes into consideration environmental factors such as tide, tidal current and nutrition. The model is a typical water dynamics equations coupled with diffusion and biology equations as follows: (For the equations please see the PDF file.)
where E and N is the nutrient content and red tide biomass in the sea water respectively.
Numerical simulation is carried out using the Noctiluca scientillans red tide in Dapeng Bay as an example. The model reproduces some characteristics of the Noctiluca scientillans red tide phenomenon in Dapeng Bay, in an attempt to clarify the mechanism and describe the macroscopic process of the red tide occurrence.
The model shows that the sea water nutrient content rises obviously before the red tide appears, and falls to the minimum in the period of red tide peaks. This relates to the fact that large propagation of the red tide organisms needs a great amount of nutrients.
The model also shows that the red tide organisms tend to congregate in the area (such as the comer of the bay) where the water exchange is not strong. |
| Key words: Red tide, Simulation model, Dapeng Bay |
