长江口-舟山海域春季海洋渔业环境质量评价

Assessment and Analysis Environment Quality of Changjiang Estuary&Zhoushan Sea Area

依据2007年春季长江口-舟山海域20个调查站位的监测资料,按《渔业水质标准》、《海水水质标准》的要求,用标准质量指数法进行评价。评价指标为化学需氧量、无机氮、磷酸盐、石油类、铜、铅、锌、镉、汞、砷,结果表明:质量指数≤0.50、0.50<质量指数≤0.75、0.75<质量指数≤1.0、1.0<质量指数≤2.0、质量指数>2.0分别占比为76.5%、7.5%、5.5%、8.5%、2%。质量指数≤0.75的站点占整个调查站点的84%,无机氮、磷酸盐、石油类是其中最主要的污染物。

According to the monitoring data in the spring of 2007 in the Changjiang Estuary Zhoushan sea area 20 survey stations, according to the Water Quality Standard for Fishery＂ and Sea Water Quality Standards requirements were evaluated with standard quality index method. The evaluation index of chemical oxygen demand, total nitrogen, phosphate, oil, copper, lead, zinc, cadmium, mercury and arsenic, the results showed the quality index≤0.50, 0.50 〈 quality index ≤0.75, 0.75 〈 quality index ≤ 1, 1.0 〈 quality index ≤2, and quality index 〉 2.0, respectively accounted for 76.5% , 7.5% , 5.5% , 8.5% , 2%. Quality index≤0. 75 sites accounted for the entire survey site 84% , and IN, PO4 -P, and oil were the main pollutant.