中文摘要：

分析了南四湖的污染现状，通过数值模拟的方法模拟、分析了现状排污情景下各入湖排污口污染负荷对上级湖的污染贡献。预测分析了南水北调一期条件下，以现状排污、现状控污和规划控污3种情景为例的枣庄市污染治理对湖区水质的影响。研究结果表明：南四湖周围各河中对上级湖出口处水环境质量的影响程度由大到小排序靠前的光府河、不牢河／郑集河、洙新赵河、新万福河和泗河应当是区域水污染治理的重点河流。随着人湖排污口污染物控制的愈加严格，排污对南四湖湖区内水环境质量的影响也越来越小，因此为了保证湖区水质，必须大力加强污染源的治理和控制。

英文摘要：

The contribution of pollutant load around Nansihu Lake to upper lake outlet water quality was simulated by mathematical models during South-North Water Transfer First-Stage Project. Based on three pollutant load cases in Zaozhuang city near Nansihu Lake,the effect of pollution control was compared. The results showed that the Guangfu River, Bulao River, Zhengji River, Zhuxinzhao River, Xinwanfu River and Sihe River are the key rivers to pollution control around the Nansihu Lake, which are the major pollution sources around the lake. The pollution would obviously release by strict pollution control. Thus, strict measures for pollution control should been carried out for the Nansihu Lake water quality.