THE CHARACTERISTICS OF BENTHIC MACROINVERTEBRATE COMMUNITY AND WATER QUALITY IN BEIJING-TIANJIN AREA
京津及邻近地区底栖动物群落特征与水质等级

The bioassessments of water quality by using Shannon's diversity index and indicator organisms of macroinvertebrates have been carried out around Beijing, Tianjin and adjacent area during 198S'-1987. The results obtained indicate that the joint indicator of diversity index and species indicator of benthic macroinvertebi ates can be satisfactorily used to evaluate and classify the status of water quality into 5 classes i.e. clean water, light pollution, moderate pollution, henvy pollution and serious pollution in this area. Most of the clean and light polluted waters are distributed in mountain area in the north-western and the heavy and serious pollution in the plain area in the south-eastern of this research scope. The urbanization is the major influence factor on water quality. So to treat and improve the urban sewage and industrial waste water quality come from Beijing and Tianjin city before discharging into environment must be emphasized.