中文摘要：

2004～2008年在青弋江、水阳江流域石臼、固城、南漪三湖采集得到岩芯钻孔。运用核素^210Pb和^137Cs对获得沉积物进行定年，同时分析了岩芯沉积物金属元素，研究近代湖泊重金属演化历史以及人类活动的影响，并对重金属进行了评价。文章运用Al元素作为粒度的代用指标对重金属进行标准化，并获取了重金属富集系数。研究表明，石臼、固城、南漪三湖钻孔中Cu和Zn的富集系数高于Ph，但Pb，Zn，Cu和Cr富集系数都不超过2，并且Cr的富集系数较小。自20世纪80年代中期以来流域内人类活动对石臼湖湖泊沉积物造成了显著的重金属污染，在南漪湖则推迟了10年左右，而在固城湖其重金属污染相对不明显。根据沉积物质量基准进行评价，发现石臼、固城、南漪三湖虽然存在一定的Cu，Ph，Zn和Cr污染，但污染造成的生态效应还不明显。

英文摘要：

Sediment cores taken from Nanyi, Gucheng and Shijiu Lakes in the Qingyi and Shuiyang drainages in 2004-2008 were analyzed for radionuclides of ^210Pb and ^137Cs and elements of copper,lead, zinc, chromium and aluminum to understand the process of heavy metal enrichment and assess the associated environmental risk. ^210Pb and ^137Cs were applied to reconstructing the chronology for the sediment cores, and aluminum was used to normalize the enrichment of heavy metals in the sediments. The data indicate that the enrichment factor（EF） of all heavy metals in the sediments of the studied lakes is lower than 2 with chromium showing the lowest EF. Copper and zinc display higher EF values than lead. These data imply that the impact of human aetivities on the lake environment occurred in different lake regions at different times： in Shijiu Lake since the middle 1980s and in Nanyi Lake sinee the middle 1990s. Whereas Gucheng Lake might be less influenced by industrial productions. According to the guideline of lake sediment quality, heavy metals in these lakes have not showed evident effects on the aquatic biota although the pollution can be discerned.