三峡水库水质演变趋势及保护对策

分析三峡库区干、支流水质现状及其在蓄水前、135m蓄水后和156m蓄水后3个阶段的演变趋势,研究水库蓄水对库区水质的影响。结果表明,库区干流现状水质总体较好且蓄水前后保持基本稳定;库区支流蓄水后水质有所下降,现状水质总体较差;部分支流的局部区段在蓄水后发生了水华。结合库区实际情况,针对性地提出了三峡水库的水质保护对策。

Trend of water quality in Three Gorges Reservoir and protection measures

The current status of water quality in the Three Gorges Reservoir and its evolving trend in three stages,before water storage,after 135 m of water storage,and after 156 m of water storage,were summarized,and the impacts of water storage on the water quality of the Three Gorges Reservoir were analyzed.The results show that the water quality in the main stream was good overall and remained stable before and after water storage;the water quality in tributaries was worse after water storage and is now quite bad overall;and algal blooms have occurred in certain sections of some tributaries after water storage.Suggestions for protection measures were proposed.