【摘要】 【目的】研究长江流经三峡水库前后的水质变化情况以及该变化与社会经济之间的关系。【方法】利用2006—2016年三峡库区统计数据及三峡水库出入库水质监测数据,使用综合指数法、空间变化幅度、多项式拟合等方法,分析出入库断面水质情况及两断面间水质变化情况,并进一步探究水质变化与社会经济发展的关系。【结果】研究表明:宜昌断面主要污染因子为氨氮和高锰酸盐指数,朱沱断面主要污染因子为氨氮,宜昌断面水质好于朱沱断面,主要是氨氮污染的好转;两断面水质在枯水期变化幅度最大,其次是平水期,在丰水期变化幅度最小;时间上,水库水质随着库区社会经济的发展不断好转,在未来一定时间内会保持好转趋势;空间上,社会经济发展程度高的地区水质较差,反之较好。【结论】研究结果为库区内水环境管制提供了参考依据。更多还原

【Abstract】 [Purposes]In order to understand the change of water quality after the Yangtze river flows through the Three Gorges Reservoir and the relationship between the change and social economy.[Methods]Based on the statistics of the Three Gorges reservoir area from 2006 to 2016 and the monitoring data of the water quality of the Three Gorges reservoir.Using comprehensive index method,spatial variation,polynomial fitting methods,such as loading and unloading section water quality analysis and water quality changes between the two section,and to further explore the water quality change and the relationship between social and economic development.[Findings]Results show that Yichang section main pollutants are ammonia nitrogen and potassium permanganate index,Zhutuo section main pollutants are ammonia nitrogen,Yichang section water quality is better than Zhutuo section,mainly of ammonia nitrogen pollution is better.The seasonal variation of water quality in both sections is the period of high water yield in the period of dry water.In time,the water quality of the reservoir has been improving with the development of the social economy in the reservoir area,and will keep improving in the future.In space,areas with high socio-economic development have poor water quality and vice versa.[Conclusions]The results provide a reference for water environment control in the reservoir area.更多还原