大汶河流域水生态系统健康评价研究

以大汶河流域为研究对象,基于2016年10月流域水生态调查数据,采用综合污染指数法、鱼类完整性指数法、层次分析法分别对水质、鱼类、河岸带进行健康评价,并在此基础上采用层次分析法对大汶河流域水生态系统进行综合评价。结果表明:大汶河流域水生态系统健康状况整体较差,较差和极差状态的点位分别占总采样点的50.0%和41.7%,健康等级为一般的采样点位仅占8.3%。从不同评价内容来看,该流域水质状况较差,其中大汶河南支、瀛汶河南段和汇河支流水质最差,为劣Ⅴ类水;在鱼类完整性评价中,24个采样点中1个采样点为健康,10个采样点为亚健康,13个采样点为一般,分别占总点位数的4.2%、42.6%和53.2%,没有较差和极差的采样点;河岸带生境状况评价结果整体较好,未出现河岸带生境较差的采样点。

Study on water ecosystem evaluation in Dawen River Basin

In this paper, we investigated the water quality , fish, and riparian zone in Dawen River Basin in October 2016 using comprehensive contamination index method, index of biotic integrity for fish, and analytic hierarchy process in order to assess the river ecosystem health in the basin. The results indicated that the health status of the water ecosystem in Dawen River Basin was generally poor. The poor and very poor sites respectively accounted for 50% and 41.7% of the total sampling points, and the sampling points with medium health level only accounted for 8.3% . The water quality was the worst in the south tributary of Dawen River, the southern section of Yingwen River, and the tributaries of Hui River, belonging to the Class Vbad water. In the evaluation of fish integrity, the results showed that 1site was healthy, 10 sites were sub-healthy , and 13 sites were medium, which respectively accounted for 4.2% , 42.6% , and 53.2% of the total sampling points. The riparian zone evaluation showed generally good results.