中文摘要：

以武陵山区域的黔江区城区3个湖库型饮用水源地（洞塘水库、小南海水库、城北水库）为对象,通过对其水质进行为期1年的观测分析,并分析季节变化规律,采用水质卫生学综合评价和多元统计分析方法进行研究分析。结果表明,3个饮用水源地水质均呈弱碱性,水质指标中pH、DO、BOD5、TN、Cl^-较为稳定,饮用水水质基本满足美国环保署、欧盟等标准限值要求。不同水库各监测指标间相关性存在显著差异,Cl^-、SO4^2-对氮磷化合物、BOD5、CODMn等产生显著或极显著影响,是影响水体富营养化的重要指标。聚类分析表明,3个水库各元素间聚合性存在差异性。聚类距离大小比较表明,Cl^-、SO4^2-是影响洞塘水库水质的最重要指标,小南海水库、城北水质受含氮类化合物影响最大,Cl^-、SO4^2-的影响也较为显著。

英文摘要：

Systematic analysis combined with the data from the one-year monitoring was conducted on the seasonal variation rule of water quality of typical lake reservoirs（ Dongtang reservoir,Xiaonanhai reservoir,and Chengbei reservoir） in Qianjiang District,Wuling mountain area,Chongqing. Comprehensive hygiene evaluation and multivariate statistical analysis were also implemented in the research and analysis. The results showed inconspicuous variations of pH,DO,BOD5,TN and Cl^- with season in three lake reservoirs,which displayed weak alkalinity from the p H analysis. The water qualities of three lake reservoirs basically reached the drinking water standards stipulated by relevant provisions from USEPA, EU and other institutions. Moreover, the correlation analysis presented significant differences among the correlation of the monitoring indicators of different reservoirs,in particular,Cl^-,SO4^2-displayed significant or very significant influence on the nitrogen-containing compounds,BOD5 and CODMn,and thus became the important indicators influencing the water quality of three lake reservoirs. The cluster analysis also presented significant differences among the indicator polymerism of three lake reservoirs. Otherwise,the comparison among the cluster distances of all eleven monitoring indicators indicated that the indicators Cl^- and SO4^2- were the foremost influence factors for the water quality of Dongtang reservoir,and also the second foremost influence factors for the water quality of the other two reservoirs. Meanwhile,the foremost influence factors for the water quality of Xiaonanhai reservoir and Chengbei reservoir are the nitrogen-containing compounds.