莱州湾东部近岸海域氮、磷污染状况研究

Study on Nitrogen and Phosphorous Pollution Status in the Offshore Area of the Eastern Laizhou Bay

依据2016—2020年5、8、10月对莱州湾东部海域水环境调查资料,对该海域中无机氮、活性磷酸盐污染现状进行分析和评价。结果表明,该海域内无机氮具有明显的季节性变化,8月监测结果明显低于5月和10月;由于该海域属于水体交换不良的海域和多方面的影响,5月和10月各站位监测的浓度值各有高低;该海域近岸监测站位活性磷酸盐浓度波动性明显高于莱州湾中部的监测站位,并且该海域活性磷酸盐浓度与降水量成正比,说明地表径流对该海域活性磷酸盐有明显影响。

Based on an environmental survey in the offshore area of eastern Laizhou Bay in May,August,and October of 2016 to 2020,the pollutions of dissolved inorganic nitrogen and reactive phosphate were analyzed and evaluated.The results showed that the dissolved inorganic nitrogen(DIN) in this area had obvious seasonal variations and the concentration of DIN in May and October were higher than that in August.Because of the poor water exchange in this sea area and other reasons,the concentrations of different monitoring sites in May and October were different.The pollutions of reactive phosphate in the offshore area were more serious than that in the center of Laizhou Bay.The pollutions of reactive phosphate were proportional to rainfall in this area.The surface runoff had a significant effect on the concentration of reactive phosphate in this area.