中文摘要：

南四湖是山东省最主要的水源地，是南水北调东线工程重要的输水通道和调蓄湖泊，其水环境状况对湖泊流域乃至整个南水北调东线工程调水水质都有很大影响。对南四湖表层沉积物中重金属和持久性有机污染物的含量、分布及来源，湖泊及入湖河流水质和富营养化水平，湿地景观格局变化等方面的研究成果进行系统论述，并提出了今后的研究方向，为南四湖水环境的管理和保护提供借鉴。

英文摘要：

Nansi Lake is both the main water source of Shandong Province ,and an important transmission water channel and storage lake of Eastern Route of South-to-North Water Diversion Project of China .The water environ-ment situation of Nansi Lake has significant impacts on the water quality of the whole lake basin and the Eastern Route of South-to-North Water Diversion Project .In this paper ,the contents ,distribution and sources of heavy metals and persistent organic pollutants in surface sediments of Nansi Lake ,the water quality and eutrophication level of the lake and tributaries ,as well as the changes of landscape pattern in Nansi Lake wetland had been system-atically discussed .Based on the results of research process ,the focuses and directions for further research on Nansi Lake were put forward ,in order to provide references for water environment management and protection of Nansi Lake .