【摘要】 支流库湾水体富营养化是三峡水库蓄水带来的主要水环境影响特征之一。根据对不同历史蓄水期间三峡库区各支流库湾的水质变化特征及富营养化状态分析表明:三峡水库从试验性蓄水阶段进入常态调度运行后,支流库湾的水动力条件被进一步削弱,入河污染物扩散能力大幅度降低,库湾水质逐渐变差,各支流库湾普遍表现为中、富营养级水平,年内整体表现为春季高于秋季。从三峡库区支流库湾水体富营养化演变特征来看,库湾水动力条件由河流态改变为湖库态是其发生水体富营养化的主驱动力因素,陆域营养盐输入是库湾水体富营养化演变的物质基础更多还原

【Abstract】 The eutrophication of tributary is one of the main water environmental problems caused by thewater storage of the Three Gorges Reservoir. According to the changes of water quality and the eutrophica-tion status of the tributaries of the Three Gorges Reservoir during the different historical impoundments,itis shown that the hydrodynamic conditions of the tributary are further weakened after the Three Gorges Res-ervoir enters the normal operation from the experimental storage stage. The ability to disperse pollutants in-to the river decreases significantly,and the water quality of the reservoir bay gradually becomes worse. Thetributaries show moderate and eutrophication levels. The overall performance during the year is higher inspring than in autumn. From the characteristics of eutrophication evolution of the tributaries in the ThreeGorges Reservoir area,the change of the hydrodynamic conditions of the reservoir bay from the river stateto the lake reservoir state is the main driving force for its eutrophication. The nutrient input is the materialbasis.更多还原