根据2009年5月太子河流域水生生物(藻类、鱼类和大型底栖动物)调查结果，以藻类、鱼类、大型底栖动物、基本水质和营养盐作为候选参数，采用总体线性回归模型和相关性分析法对它们进行筛选，构建了多指标河流健康综合评价指数，对辽河流域河流健康进行了评估。结果表明，辽河流域河流健康受损较重，未达到“良”等级的样点有146个，所占比例高达83%，主要分布在浑河、东辽河和西辽河流域，这些流域受到来自城市、工业及农业面源污染较大；“良”等级的样点只有30个，主要分布在太子河流域上游地区，这些样点受到人类干扰较少；整个流域鱼类类群存在显著退化趋势，其中西辽河的鱼类类群衰退现象最明显。%The multi-variable assessment method is a current trend for studying the health of river ecosys-tems. Asystem of candidate indices,including physica-l chemical parameters and nutrition parameters,algae index, macroinvertebrates index and fish index were set based on monitoringdata collected from the Taizi River basin in May 2009. Spearman’s Rank correlations and Regression modelling were used to select compatible indices to build the metric-comprehensive assessment index which was applied to evaluate the Liaohe River healthy. The results indicated that the hole basin of Liaohe River was in poor healthy situation,the poor health sites was 146,account 83%of total sites,were distributed in the Hunhe River,East Liao river and West Liao River basin where discharge of urban and industrial pollution was the primary factor impacting the river health. The other 17%of all sites were designated as good healthy,mainly located at Taizi River basin,and the best sites was located at the headstream of Taizi River basin where little disturbanceby human activities occurred. About the biotic indicators assessment,fish community healthy level was the worst,the best one was algae.
展开▼
