烟台港港池水质状况调查及评价

Investigation and Evaluation on Water Quality of Harbor Basin at Yantai Port

根据2012—2016年烟台港港池水质监测结果,运用单因子指数法、Cox-Stuart检验方法及Pearson相关分析探讨港池水质污染程度、水质变化趋势及各监测项目间的相关关系。结果表明:港池海域水质总体良好,各监测项目的单因子污染指数呈现逐年下降趋势,且下降趋势均有统计学意义(P=0.05),COD与DO、活性磷酸盐、Cu呈显著正相关。5年中pH值、COD、DO、石油类、重金属(Cu、Cd、Zn、Pb)未见超标现象,活性磷酸盐和无机氮存在不同程度的超标,为该海域主要污染因子,有引发海域赤潮的潜在生态风险。

According to the monitoring results of the water quality of harbor basin at Yantai port from 2012 to 2016, the water pollution level and its variation trend, the correlations between the monitoring items were discussed by using single factor index, Cox-Stuart test and Pearson correlation analysis methods. The results showed that the water quality at the port area was generally good. The single factor pollution index of each monitoring item declined year by year, with statistical significance （ P =0.05）, COD was significantly positive correlated with DO, P and Cu. During the five years, pH, COD, DO,P and heavy metals did not exceed the standards, but active phosphate and inorganic nitrogen exceeded the standards at different degrees, and became the main pollution factors and the inducements of red tide risks in the sea area.