【摘要】 通过11年监测数据的分析,并与木兰、萩芦两溪污染源入海情况的变化相结合,评价了兴化湾木兰、萩芦两溪入海海域环境变化,同时评价了其2018年的环境质量状况,为2019年的木兰溪流域整治提供参考。评价结果:1)兴化湾两溪入海海域的环境从2008年到2018年都未见好转,主要污染物仍然是无机氮(DIN)、活性磷酸盐(DIP)。2)水环境中重金属含量均未超出标准,但2009年Hg、2018年Cu在沉积物中均超标;在重金属的环境压力方面,沉积物高于水。水和沉积物中Cu和Hg含量高于其它重金属。3)2018年两溪入海海域的海水水质100%超标,主要污染物是DIN和DIP,正对木兰溪入海口处的站点污染情况较突出,该站点水中氮和磷、沉积物中Cu均超标,所评价的其他指标均尚能满足海洋功能区划的需要。更多还原

【Abstract】 Changes in the environment of the sea entrance areas of the Mulan River and the Qiulu River in Xinghua Bay were evaluated through the analysis of eleven years of monitoring data,combined with the changes of the pollution sources.The environmental quality in 2018 was also evaluated in order to provide reference for the remediation of the Mulan River watershed in 2019.The results of the evaluation were as follows:1) The environment of the sea entrance areas of the Mulan River and the Qiulu River in Xinghua Bay had no improvement from 2008 to 2018.DIN and DIP were still the main pollutants.2) The content of heavy metals in water environment did not exceed the standard.Hg(2009 a) and Cu(2018 a) in the sediments exceeds standard.Environmental pressure sediments of heavy metals were higher than water.Higher levels of Cu and Hg in water and sediments than other heavy metals was observed.3) The seawater quality of the sea entrance areas of both rivers exceeded the standard in 100% of the samples in 2018.The main pollutants were active phosphate and inorganic nitrogen.It was more prominent in the sea entrance area of the Mulan River.The nitrogen in the water,phosphorus and sediment in that area were all exceeding the standard,while other evaluated indicators could still meet the needs of marine functional zoning.更多还原