辽东湾西北部近岸海域水质现状调查及污染特征分析

根据辽东湾西北部海域2013年9月和2014年5月春、秋两季常规水质调查数据，分析了辽东湾西北部海域的污染状况、主要污染物及其来源。分析结果表明:辽东湾西北部海域的污染呈现离岸递减的分布特征，该海域的污染属于陆源污染，控制陆域污染物的入海将有效控制该海域的环境质量。该海域的春季一类、二类有机污染指数均大于1，部分站位三类有机污染指数大于1，春季的有机污染程度要重于秋季，并且秋季污染指数及污染物与离岸距离呈线性负相关，具有更加规律的离岸分布特征。该海域各海洋功能区的富营养化指数均大于1，具有轻度富营养化的趋势。该海域的富营养化特征污染物为无机氮，有机物污染的特征污染物为COD。

The current situation and pollution feather analysis of water quality on coastal waters of the northwest Liaodong bay

According to the conventional water quality survey data of the waters of the northwest Liaodong Bay in September 2013 and May 2014, the pollution condition, main pollutants and their source of northwest of Liaodong Bay waters were studied.The results showed:the pollution distribution characteristics of the waters of the northwest Liaodong Bay present offshore decreasing.The area pollution belongs to land-source pollution.The controlling of land pollutants discharge will effectively control the waters pollution.The spring organic pollution indexes of frist kind and second kind were more than 1, some stations organic pollution indexes of third kind were more than 1, the spring have heavier organic pollution degree than autumn, the pollution indexes and the distance from the coast were negative correlation and with a more regular offshore distribution characteristics.The eutrophication indexes of all marine functional areas in this area are more than 1, which are a trend of slight eutrophication.The eutrophication characteristicpollutant of the waters was the inorganic nitrogen, and the organic characteristic pollutant was COD.