中文摘要：

应用主成份分析原理，按照主成份提取的信息超过原始信息84％的原则，对武汉市东湖的主体湖区（郭郑湖和塘林湖）的0cm-7cm的沉积物30个代表性样品12种元素进行分析，确定其沉积物的重金属的污染源的主要类型,结果表明，郭郑湖第一污染源（占56％）为湖区周围的工业燃煤尘埃，其次（占16％）为交通尾气、生活污水和雨水片流，再次（占12％）为电镀、印刷等行业的工业污水,塘林湖第一污染源（占65％）为湖区周围的生产性煤燃烧的粉尘，其次（17％）为生活污水、医院污水和周围土壤的淋溶作用，再次（占9％）为废旧电池、报章杂志和农用物资等,采用均方根综合污染指数法评价分析东湖主体湖区的沉积物的污染程度为轻度污染，其中郭郑湖的污染程度高于塘林湖。

英文摘要：

In order to determine the main types of pollution origins of the heavy metals of sediments of Lake Donghu, Wuhan, based on principle of principal components and the rule of picked-up information which is over 84% of original ones, we have analyzed twelve elements of thirty representative samples of 0 - 7 cm sediments of Lake Guozheng and Lake Tanglin, which are the main sub lake of Lake Donghu, Wuhan city. The results indicate that for Guozheng Lake sediments, the first pollution origin （56%） is industry coal dust around the lake, the second origins （16%） are tail gas, domestic sewage and rain flow, and the third parts（12% ） are industry sewage with electroplate and press etc. For Lake Tanglin, the first pollution origin （65%） is atmosphere dust which is from industry coal combustion, the second origins （17%） are sewage with household, hospital and soil etc, and the third parts （9%） are disused battery, newspapers and farming materials etc. Employing the comprehensive pollution indexes of heavy metals, which were calculated by root mean square on the background values, to evaluate the pollution degree of sediments of main sublakes of Lake Donghu, it is found that both of them belong to light contamination and the pollution degree of Lake Guozheng is higher than that of Lake Tanglin.