2010-2018年广西近岸海域水质状况及变化趋势

Water Quality Status and Changing Trend of Guangxi Coastal Waters from 2010 to 2018

根据2018年广西海洋环境监测信息专报及2010-2017年广西海洋环境质量公报,本研究分析了广西近岸海域海水环境质量状况及其变化趋势。结果表明,2018年广西近岸海域海水环境质量状况总体良好,从符合第一、二类水质的海域面积来看,冬季占比最大,而夏季占比最小。2010-2018年,广西近岸海域水质呈变好的趋势。局部海域污染严重,四类与劣四类海水主要分布在北仑河口、防城湾、钦州湾、茅尾海、大风江和廉州湾海域,主要超标因子是无机氮、活性磷酸盐和石油类。

According to the 2018 Guangxi Marine Environmental Monitoring Information Special Report and the 2010-2017 Guangxi Marine Environmental Quality Bulletin,this study analyzed the status and changing trends of the marine environmental quality in the coastal waters of Guangxi.The results showed that in 2018,the seawater environmental quality in the coastal waters of Guangxi was generally good,in terms of the area of sea areas that met the first and second water quality,winter accounted for the largest proportion,while summer accounted for the smallest proportion.From 2010 to 2018,the water quality of the coastal waters of Guangxi showed a trend of improvement.Local sea areas were seriously polluted,theⅣand inferiorⅣseawaters were mainly distributed in the Beilun River Estuary,Fangcheng Bay,Qinzhou Bay,Maowei Sea,Dafeng River and Lianzhou Bay,the main excess factors were inorganic nitrogen,active phosphate and petroleum..