| 三峡水库干流倒灌对支流库湾营养盐分布的影响 |
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| 引用本文： | 胡念三,刘德富,纪道斌,杨正健.三峡水库干流倒灌对支流库湾营养盐分布的影响[J].环境科学与技术,2012(10):6-11. |
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| 作者姓名： | 胡念三 刘德富 纪道斌 杨正健 |
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| 作者单位： | 三峡大学土木与建筑学院;三峡库区生态环境教育部工程研究中心;三峡大学水利与环境学院;武汉大学水利水电学院 |
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| 基金项目： | 国家自然科学基金面上项目(51179095),国家自然科学基金杰出青年基金(50925932);国家水体污染控制与治理科技重大专项(2009ZX07104-001,2008ZX07104-004,2008ZX07104-003-03) |
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| 摘 要： | 三峡水库蓄水后,库区普遍存在干流水体倒灌支流的现象。为探明干流倒灌对支流库湾水动力学特性及其营养盐分布的影响规律,于2010年对库区4条典型支流库湾水流速度、水深、总氮(TN)、总磷(TP)等进行了监测。监测结果表明,干支流以异重流形式进行水体交换;大宁河、磨刀溪、小江3条支流库湾水体TN、TP浓度均低于干流水体;香溪河库湾水体TN浓度同样低于干流水体,但库湾上游水体TP浓度高于干流水体;受干流倒灌影响,支流库湾水体主要营养盐空间分布不均,营养盐浓度高的干流水体倒灌进入库湾,对其影响范围内的支流水体的营养盐起到补给作用。
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| 关 键 词： | 三峡水库 支流库湾 倒灌 营养盐 |
Effect of Backward Flow from Mainstream on Nutrients Distribution of Tributaries in Three Gorges Reservoir |
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| HU Nian-san,LIU De-fu,JI Dao-bin,YANG Zheng-jian.Effect of Backward Flow from Mainstream on Nutrients Distribution of Tributaries in Three Gorges Reservoir[J].Environmental Science and Technology,2012(10):6-11. |
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| Authors: | HU Nian-san LIU De-fu JI Dao-bin YANG Zheng-jian |
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| Institution: | 1.School of Civil Engineering and Architecture,Three Gorges University; 2.Engineering Research Centre of Eco-environment in Three Gorges Reservoir Region of Ministry of Education,Three Gorges University; 3.School of Hydraulic and Environmental Engineering,Three Gorges University,Yichang 443002,China; 4.School of Water Resource and Hydroelectric Engineering,Wuhan University,Wuhan 430072,China) |
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| Abstract: | Phenomenon that water of the mainstream flowing backward into tributaries is universal after water storage in Three Gorges Reservoir.In order to find out the influence of backward flow from the mainstream on the hydrodynamic characteristics and nutrient distribution of tributaries,field monitoring for velocity,water depth,and total nitrogen(TN) and total phosphorus(TP) of four typical tributaries in storeroom area were taken in 2010.Results of the monitoring showed that the mainstream exchanges water with tributaries in form of density current.In the tributaries Daninghe,Modaoxi and Xiaojiang,the concentrations of TN and TP are lower than that of the mainstream.The same happens on the concentration of TN in Xiangxi Bay,however with which upstream the concentration of TP is higher than that of the mainstream.The space distribution of the main nutrients in tributaries is uneven under the influence of backward flow from the mainstream.Tributaries get nutrient supply in the area where water with nutrients in higher concentration from the mainstream flow into. |
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| Keywords: | Three Gorges Reservoir tributary backward flow nutrient |
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