黄河口牡蛎产卵场及邻近海域水质现状评价

摘要

2015年调查了黄河口枯水期(5月)和丰水期(8月)牡蛎产卵场及邻近海域的水质状况,采用单因子标准指数评价法、多参数水质综合评价法、有机污染评价指数法和营养质量状态指数法分析评价该海域水环境质量现状.结果表明:该海域总体为富营养化;无机氮(DIN)和化学需氧量(CODMn)是水质富营养化的主要因子.水质量总体属轻污染,Pb、Hg、Zn、DIN和CODMn为该海域主要污染因子,Pb、Hg、Zn和DIN为优先控制的污染因子.丰水期水质优于枯水期.%The water quality was monitored in oyster spawning ground in Yellow River Estuary and adjacent waters in low-water level season (May) and wet-season (August) of 2015 and the water environmental quality was assessed using single factor index evaluation standard,multi-parameter water quality comprehensive evaluation method,organic pollution evaluation index method and nutritional quality index method.The results showed that the waters were eutrophication wholly,with the preponderant eutrophication factors of dissolved inorganic nitrogen (DIN) and chemical oxygen demand (CODMn).The water quality was light polluted overall,with the main pollution factors ofPb,Hg,Zn,DIN and the CODMn,and the precedent-controlled factors ofPb,Hg,Zn and DIN.There was better water quality in wet-season than that in low-water level season.