| 太湖底泥沉积物释放规律研究 |
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| 引用本文： | 胡开明,逄勇,余辉,王华.太湖底泥沉积物释放规律研究[J].环境科学与技术,2011(Z2):7-12. |
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| 作者姓名： | 胡开明 逄勇 余辉 王华 |
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| 作者单位： | 河海大学环境学院;河海大学浅水湖泊综合治理与资源开发教育部重点实验室;中国环境科学研究院湖泊生态环境创新基地 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2008ZX07101-001-02,2008ZX07101-002,2008ZX07101-006;2009ZX07528-005-03-02);国家自然科学基金联合资助(51009049) |
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| 摘 要： | 为探索浅水湖泊水动力扰动作用对底泥再悬浮影响的规律,通过矩形水槽试验模拟了太湖不同流速下的沉积物释放,并结合太湖悬浮物模型进行推算,获得了底泥沉积物再悬浮通量与风速之间的定量关系。结果表明:太湖底泥在3种起动标准下对应的起动流速分别为15、30和40 cm/s;底泥沉积物再悬浮通量与风速呈现线性正相关关系,再悬浮通量随风速增大而增大,且相关性较好。该方法为太湖内源释放量估算及富营养化治理提供参考依据。
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| 关 键 词： | 底泥释放 矩形水槽 起动流速 太湖 |
Study on the Law of Sediment Release in Lake Taihu |
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| HU Kai-ming,PANG Yong,YU Hui,WANG Hua.Study on the Law of Sediment Release in Lake Taihu[J].Environmental Science and Technology,2011(Z2):7-12. |
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| Authors: | HU Kai-ming PANG Yong YU Hui WANG Hua |
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| Institution: | 1(1.College of Environment,Hohai University,Nanjing 210098,China; 2.Key Laboratory for Integrated Regulation and Resources Exploitation on Shallow Lakes,Ministry of Education,Hohai University,Nanjing 210098,China; 3.Research Center of Lake Environment,Chinese Academy of Environmental Science,Beijing 100012,China) |
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| Abstract: | Sediment release under different flow velocities of Lake Taihu was simulating in a rectangle flume to study sediment resuspension under hydrodynamic conditions in shallow lakes.A suspended solid model on wind-driven current in Lake Taihu was established.Based on the model,the quantitative correlations between resuspended flux of sediment and wind speed were achieved.It was showed that the starting velocities of sediment in Lake Taihu at three different incipient standards(individual movement,ounce movement,universal movement) gained from the experiments were 15,30 and 40 cm/s respectively.The resuspended fluxs of sediment were increased with the increasing of wind speed,and they demonstrated good linear relationship.The conclusion can benefit the coming research on release amount estimation of internal load and eutrophication control measures in Lake Taihu. |
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| Keywords: | sediment release rectangle flume starting velocity Lake Taihu |
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