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为研究南四湖形成以来的污染变化过程，对微山湖、独山湖两湖底泥剖面的同位素测年、沉积速率进行了测定并作了有机地球化学指标和重金属指标的测试分析．研究结果表明，自湖泊形成以来２０００余年的污染变化，可分为４个阶段，历史上污染变化受到黄河泛滥、开挖运河等事件的影响，近２０年受现代工业污染影响显著．
In order to study the process of pollution change after the formation of Nansi Lake, the isotope dating and sedimentation rate of the sediments of Weishan Lake and Dushan Lake were measured and the organic geochemical and heavy metal indexes were tested. The results show that the pollution change since the lake was formed over 2000 years can be divided into four stages. The pollution change in history has been affected by the flooding of the Yellow River and the excavation of the canal. In the recent 20 years, the impact of modern industrial pollution was significant.