洞庭湖湖区水质时空演化(1983-2004年)  

Temporal-spatial evolution of water quality in Lake Dongting,China

作　　者：申锐莉[1] 鲍征宇[1] 周旻[2] 乔胜英[1] 谢淑云[1] 

机构地区：[1]中国地质大学(武汉)地球科学学院地球化学研究所,武汉430074 [2]湖北省地质调查院,武汉430030

出　　处：《湖泊科学》2007年第6期677-682,共6页Journal of Lake Sciences

基　　金：湖南省洞庭湖区生态地球化学调查项目(200314200021)资助.

摘　　要：根据洞庭湖湖区的1983-2004年的水质监测数据,参照GB3838-2002中Ⅲ类水质标准,运用内梅罗水污染指数法进行水质评价,分析了洞庭湖湖区22年来的水质时空变化.结果表明:洞庭湖湖区水质污染在时间上呈有升有降的波动变化.洞庭湖湖区丰水期和洪水期的水质较差,但是从2002年以后,丰水期的水质逐渐好于平水期.污染空间变化表现为入湖河道的污染程度高于湖体,湖体污染呈西洞庭湖的污染较为严重,南洞庭湖其次,东洞庭湖的水质仍较好的格局.According to Basic Analytical Methods of Environmental Quality Standards for surface water, GB3838- 2002, we used the 1983 -2004 monitoring data to evaluate and characterize water quality condition and to analyze water quality temporal-spatial evolution trend of Lake Dongting, based on the application of comprehensive index methods such as Nemerow Index. The results showed that Water quality changed in Lake Dongting which fluctuated between up and down temporally. In 1983 - 1985, water quality was clean in Lake Dongting. From then on, water quality had been polluted seriously in 1988 and graduated in light pollution after 1991, and then ran down in 1999 and dropped to light pollution in 2001 again, as well as had begun to aggravate in 2004. The main pollutant was to- tal phosphorus （TP） in Lake Dongting. Water quality was worse in the flood water season than in the other water seasons, but after 2002, water quality in the flood water season had been better than in the normal water season. The water pollution could be more serious in the entering riverways than in the lake bodies of Lake Dongting spatially. Water quality in Lake West Dongting was worst, in Lake South Dongting was worse, and in Lake East Dongting was not polluted badly.

关 键 词：洞庭湖 水质 内梅罗指数 演化 

分 类 号：X824[环境科学与工程—环境工程]