Take Fenhe Reservoir and upstream reach for example, Environment Water Qaulity Index(CCME WQI) method of Canadian Council of Ministers is used to evaluate water quality of Fenhe Reservoir, which selects 23 water quality monitoring items except water temperature stipulated in Table 1 of surface water environmental quality standard as water monitoring parameters. At the same time, CCME WQI is used to evaluate water quality of three sampling sites of the Fenhe Reservoir upstream reach, which selects pH, DO, NH3-N, BOD5, COD, TN, TP, petroleum, F- and volatile phenol as 10 water monitoring parameters. The comparison and analysis of CCME WQI and single factor evaluation method are carried out. The results show that the CCME WQI method considers the combination of “exceeding scope, exceeding frequency and exceeding amplitude”, and the evaluation results of CCME WQI are much closer to reality than single-factor-method. The quantification of CCME WQI also provides convenience for environmental management. However, the evaluation of standard and the items and number of water quality monitoring have a certain impact on the evaluation results of CCME WQI, which still needs to be further studied.
Key words
CCME WQI /
fenhe reservoir /
water quality assessment
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