基于水生态环境质量综合指数评价徐州河流

采用水生态环境质量综合指数对徐州市11个国控河流断面水环境质量进行评价。结果表明,各断面处于轻度污染到优秀级别,徐州市河流水生态质量整体良好。Spearman相关性分析显示各分指数中,水化学指标赋值与大型底栖动物赋值显著相关,着生藻类赋值与生境指标赋值负相关。指出,水生态环境综合评价指数弥补了单纯化学指标或单纯生物指标评价水质不够全面的问题,首次加入生境指标,体现了环境管理从指标控制到生态保护思路的转变。提出,对于水生态环境综合评价指数分指数化学因子、生物因子的评价指数如何选取,还需进一步完善。

Application of Water Eco environment Quality Index to Evaluation River Sections in Xuzhou

Water eco environment quality index was adopted to evaluate the water environment quality of 11 state controlled cross sections of major rivers in Xuzhou city. The results showed that the water eco environment quality of Xuzhou city was overall good, ranged from Mild pollution to Excellent level. It indicated that the ecological quality of Xuzhou Rivers, by and large, was in Good level. Spearman correlation analysis indicated that hydrochemical index was significantly correlated with macrobenthic index, and Periphytic Algae was negatively correlated with habitat indexes. The water eco environment quality index makes up for shortage that the comprehensive results of water quality evaluation can not be obtained by only using hydrochemical index or biological index individual. Habitat index was added for the first time, which reflected the change of environmental management from index control to ecological protection. In this index, related issues such as how to select various sub indexes need to be further improved.