Last , combining the three diversity indexes and the five chemical indexes , the major constitution component analysis and the clustering analysis were applied to make the evaluation of the water quality . at the same time , the nutrition type and the black and foetid rate were evaluated 最后，结合三项多样性指数和五项化学指标，运用主成分分析和聚类分析评价内河的水质，并对内河进行营养型和黑臭率评价。
2.
The fuzhou ' s inner river belongs to the rich nutrition type . the water quality changes little comparing with the investigating results ten years ago but the black and foetid rate has been improved . eventually , we analyzed the polluting factor of the inner water and provided some useful suggestions for the management 实验结果与十年前内河水质调查的结果进行比较，得出福州内河水质没有明显的转变，但黑臭率有所改善，最后分析了内河污染的成因，并提出治理的意见和建议。
