中文摘要：

对昆承湖9个采样点柱状沉积物中营养元素（TN，TP和TOC）和重金属元素（Pb，Cu，Zn，Cd和Cr）的垂向分布进行测定．结果表明，各元素含量都表现为随沉积深度而降低的趋势．相关研究表明，TOC与TN的环境行为近似，说明TN的沉积与生物有机物的沉积相伴随．重金属元素（Pb，Cu，Zn，Cd和Cr）含量均与TOC含量呈显著正相关关系，表明沉积物中重金属污染受人类活动作用影响较为明显．碳氮比分析表明，昆承湖沉积物中的有机质有着明显的双重来源．对沉积物进行环境评价发现，昆承湖沉积物有机污染较轻，仍处于较清洁状态至尚清洁范畴．地积累指数评价显示，重金属污染主要集中在沉积物表层，主要污染元素为Zn，而Cd和Cr基本属于无污染状态。

英文摘要：

The vertical distributions of nutriment elements （TN, TP and TOC） and heavy metals （Pb, Cu, Zn, Cd, Cr） in the columnar sediments of 9 sampling sites in Lake Kuncheng were determined. The results showed that the contents of all the elements lowered continuously with the increase of the sediment depth. The environmental behavior of TOC was similar to TN＇ s, which accounts for that the aggrandizement of TN is accompanied by the organic substances; there was a positive correlation between TOC and heavy metals, which indicated that the pollution of heavy metals was disturbed markedly by human beings. The organic substances in the sediments had obvious dual sources. By evaluating the sediments, it showed that organic pollution of the lake was in the state of clear and less clear, and the results of index of geo- accumulation （Igco） evaluation showed that pollution mainly focused on the surface and the dominant contaminant was Zn, and there were basically no pollution of Cd and Cr.