藻类动力学模型和三维水流模型结合及其应用
文献类型：学位论文
| 作者 | 张成成 |
| 学位类别 | 硕士 |
| 答辩日期 | 2014-05 |
| 授予单位 | 中国科学院研究生院 |
| 授予地点 | 北京 |
| 导师 | 陈求稳 |
| 关键词 | 太湖 SALMO SELFE 三维水生态模型 富营养化 Lake Taihu SALMO SELFE eco-hydrodynamic model eutrophication |
| 其他题名 | Integration and Application of Algae Dynamic Model and Three-Dimensional Hydrodynamic Model |
| 学位专业 | 环境工程 |
| 中文摘要 | 湖泊富营养化治理的根本是污染控制和生态修复，但湖泊生态系统的恢复是一个漫长的过程。在此期间，开发并应用数值模型，对太湖水质和藻类时空动态进行模拟，分析蓝藻水华控制方案，对于加强湖泊水环境管理和提升藻类水华应急能力具有重要意义。 本研究以太湖为对象，将湖泊生态模型SALMO与水动力模型SELFE结合，建立了太湖三维水生态模型，模拟了太湖 2009~2011年不同风场条件下的太湖流场特征，以及磷酸盐、硝酸盐、溶解氧、浮游动物生物量和三类浮游植物功能群(硅藻、绿藻和蓝藻)生物量的时空动态变化，并通过情景分析研究了藻类生物量与环境因子之间的响应关系，以期为太湖富营养化治理和水华管理提供依据。 本研究得到的主要结论如下： 1.开发的三维水生态模型可以较好地模拟太湖不同风场条件下的流场特征。东南风、西北风和东北风等 3种主导风场条件下的太湖流场模拟结果与文献中结果基本一致。 2.开发的三维水生态模型能够用于太湖营养盐、溶解氧、浮游动物和藻类时空动态的模拟。尽管不同站点的模拟效果存在差异，浮游生物峰值模拟结果尚不理想，但是各站点模拟结果与实测结果变化趋势吻合。参数率定不足、参数空间一致性，以及模型部分过程缺失，可能是造成模拟结果不理想的原因。 3.控制内源磷(P)是减轻太湖富营养化、防治水华的有效手段。情景模拟表明控制内源氮(N)对藻类生物量影响很小，控制内源 P可以大幅度减少藻类生物量，生物操控的综合控藻效果并不显著，而全球变暖则对藻类生长有促进作用。 |
| 英文摘要 | The treatment of eutrophication for Lake Taihu relies on pollution control and ecological restoration, but the restoring process of the lake ecosystem tends to take a long time. In the meantime, development and application of a numerical model in order to study the spatial and temporal variation of water quality and algae, as well as to analyze algal bloom control schemes, will have great significance in strengthening lake management and improving emergency response capacity of algal blooms. Lake Taihu was taken as the study object, and a three dimensional eco-hydrodynamic model was established by coupling the lake ecosystem model SALMO with the hydrodynamic model SELFE. The model was then applied to simulate the water level changes in Lake Taihu from 2009 to 2011, the flow field characteristics under different wind conditions, and the spatial-temporal changes of phosphate, nitrate, dissolved oxygen, zooplankton biomass, and algae biomass of three functional groups (diatoms, green algae and blue-green algae), before being used to analyze the interactive relationships between algae growth and environmental factors with scenario analyses to provide basis for the treatment of eutrophication and the management of algal blooms in Lake Taihu. Several conclusions from the study were reached as follows. 1. The model developed in this study could well simulate the water level changes for three years and the flow circulations under different wind conditions in Lake Taihu. The modeled flow fields under prevailing winds blown from south-east, north-east and north-west, were in agreement with results of a previous study from literature. 2. The model could be conducted to simulate the lake’s nutrients, dissolved oxygen, zooplankton and algae dynamics. Although the simulation results at various sites were either good or bad, and the plankton peaks could not be effectively followed, the trends of water quality parameters for each site were generally in agreement with the observations. Insufficiency of parameter calibration, spatial consistency of parameter setting, along with absence of some ecological processes,were likely to be the main causes of bad model performance. 3. Controlling the internal phosphate release appeared to be an effective way to attenuate the degree of eutrophication and to restrain algal blooms. The scenario analyses showed that, decreasing the internal nitrate release had almost no impact on algae biomass, reducing the internal phosphate could bring a significant drop of algae biomass, the comprehensive depressing effect from bio-manipulation was not remarkable, and global warming would promote the growth of phytoplankton. |
| 公开日期 | 2015-07-08 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/15733]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | 张成成. 藻类动力学模型和三维水流模型结合及其应用[D]. 北京. 中国科学院研究生院. 2014. |
入库方式： OAI收割
来源：生态环境研究中心
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