静止水体中微囊藻属迁移轨迹的数值模拟

发布时间：2018-07-10 11:37

本文选题：微囊藻属 + 迁移轨迹　；参考：《中国环境科学》2017年05期

【摘要】：通过建立水质模型与微囊藻属浮力调节模型相结合的复合模型,模拟微囊藻属在静止水体中的迁移轨迹.模拟结果表明:微囊藻属在不同水深的水体中呈现不同的迁移轨迹.当水深较浅,大量光强可以直射水底时,不同直径大小的微囊藻群体均沉降在水底;当水深较深时,不同直径大小的微囊藻群体均在水深方向周期性上浮下沉运动.群体直径大小决定微囊藻属的垂向迁移幅度,直径越大的微囊藻群体在水深方向的迁移幅度越大.消光系数决定微囊藻属的迁移中心位置,消光系数小,微囊藻属在水深较深处运动;消光系数大,微囊藻属在靠近水面处运动.
[Abstract]:The water quality model and the buoyancy regulation model of Microcystis were established to simulate the migration trajectory of Microcystis in stationary water. The simulation results show that microcystis exhibit different migration trajectories in different water depths. When the water depth is shallow and a large amount of light intensity can directly shoot at the bottom, the populations of microcystis with different diameters all settle on the water bottom, and when the water depth is deeper, the populations of microcystis of different diameters are periodically floating and sinking in the direction of water depth. The vertical migration amplitude of microcystis is determined by population diameter, and the migration range of microcystis with larger diameter is larger in the direction of water depth. The extinction coefficient determines the location of the migration center of the genus Microcystis, and the extinction coefficient is small, and the microcystis move in the deep water depth, while the microcystis move near the water surface when the extinction coefficient is large.
【作者单位】：中国水利水电科学研究院;水利部防洪抗旱减灾工程技术研究中心;西南科技大学环境与资源学院;清华大学水沙科学与水利水电工程国家重点实验室;
【基金】：国家科技支撑项目(2015BAB07B09) 国家自然科学基金资助项目(51579130,91647116) 教育部创新团队发展计划(IRT13025)
【分类号】：X173;X52

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