WATER ECOLOGICAL HEALTH ASSESSMENT OF THE MULING RIVER BASIN BASED ON ANALYTIC HIERARCHY PROCESS IN NORTHEAST CHINA

Le résumé fourni par la source

In order to explore the water ecological health of the Muling River, the largest tributary of Wusuli River in northeast China.The environmental factors and aquatic organisms of the Muling River were investigated in different seasons.During the investigation, 83 species and 17 functional groups of phytoplankton, and 36 species and seven functional groups of zooplankton, and 158 genera/species and six functional feending groups of macroinvertebrates, and 46 species and seven fish functional groups were found.The evaluation system of water ecological health in the Muling River Basin, including 27 indexes, was established by analytic hierarchy process by calculating, which values in each season were 0.4177, 0.4428, 0.5071, 0.4699, 0.4799 and 0.6434, respectively.The seasonal changes of water ecological health classification rise from level III to level II, and the health status rises from the general level to the sub-health level.The overall trend is rising, the average value is 0.4935, the health classification is level III, and the health status is general.Generally speaking, the water ecological health level of the Muling River Basin is the highest in autumn.

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