Abstract
Based on the monthly monitoring data in the Xinlicheng Reservoir from 2008 to 2011 in 3 zones (fluvial, transitional and lacustrine), 6 water quality variables were selected as evaluation indicators to evaluate the water environmental quality by improved Nemerow comprehensive pollution index method. The results indicated the reservoir water quality reached classII or III during the study period and met the requirements of centralized drinking water. No significant differences (P > 0.05) for Nemerow indexes were detected among seasons and zones. However, that Nemerow indexes slightly decreased along the longitudinal axis of reservoir showed the water quality in the lacustrine zone was better than that in the fluvial zone, which implied the reservoir ecological system had self-purification function. The improved Nemerow index method based on weight is objective, and the pollution factor with maximum weight is total phosphorus (TP) which is followed by ammonia nitrogen (NH3-N) and total nitrogen (TN). Water quality protection strategies should focus on controlling nutrient emissions and prevent eutrophication, including exogenous governance and endogenous control.
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