2012—2014年舟山近岸海域海洋功能区水质达标率统计与评价

Statistics and Evaluation about Water Quality Compliance Rate of Functional Coastal Areas of Zhoushan Islands in 2012—2014

随着国家对长江流域实施环境综合整治、浙江省委省政府开展"五水共治"等环境整治工程,陆源入海污染物总量总体呈下降趋势,近几年舟山近岸海域环境质量呈好转态势。2007—2013年舟山近岸海域水质均不符合第一类海水水质标准,2014年符合第一类海水水质标准的海域有1 269km2,仅占全市海域面积的6.1%,海水质量总体形势不容乐观,水体富营养化程度较高,海洋功能区水质达标率较低。通过对舟山海域84个二级类基本功能区水质达标率进行统计分析,2012—2014年海洋功能区水质达标率分别为35.7%、38.1%和44.0%,超标因子为无机氮和活性磷酸盐。

With the implementation of the national comprehensive improvement of the environment of the Yangtze River Basin,the Provincial Party Committee and the Provincial Government of Zhejiang has carried out'five water treatments'and other environmental remediation projects.The overall land-based pollutants are in a declining trend,and the environment quality of coastal waters has been improved in recent years.There were no coastal waters conform the first type of sea water quality standards in 2007—2013,and there were such sea water of 1 269km^2 in 2014,accounted for only 6.1%of sea areas of Zhoushan.The overall situation of sea water quality is not optimistic.The degree of eutrophication of water body is high,and the rate of water quality in marine functional area is low.Based on the statistical analysis of the water quality compliance rate of two class 84 class of Zhoushan coastal area,marine functional area water quality compliance rate was 35.7%,38.1%,44.0%in 2012—2014,by which the exceeding standard factor is inorganic nitrogen and active phosphate.