用营养状态指数法 (TSI)对江西省红壤区余江县东塘、五湖、仙塘三个水库的水质状况进行综合评价 ,结果表明三个水体的水质状况均呈富营养态。在此基础上对三个水库的 1 0项主要水化学指标进行主成分分析 ,表明亚硝态氮和氨氮对第一主成分的贡献最大 ,COD为第二主成分的主要贡献者 ;而且三个水库的水质受水中有机物含量的影响最大 ,这一结果与当地的农业结构密切相关 The water quality status of three reservoirs in Dongtang, Wuhu and Xiantang of Yujiang County in red soil area of ​​Jiangxi Province was evaluated comprehensively by means of nutritional status index (TSI). The results showed that the water quality of the three water bodies was all in an eutrophic state. On this basis, the principal component analysis of 10 major water chemistry indicators of the three reservoirs shows that the contribution of nitrite nitrogen and ammonia nitrogen to the first principal component is the largest, COD is the major contributor to the second principal component, and the third The water quality of the reservoirs is most affected by the organic matter content in the water and this result is closely related to the local agricultural structure