六横大岙附近海域环境质量现状评价

Present assessment of environmental quality in sea area near Daao, Liuheng Island

根据１９９５年４月对码头工程区附近海域的水质和沉积物的环境质量现场调查，采用环境质量指数法，评价了该海区水质和沉积物的环境质量状况。结果表明，水质中无机氮严重超标，超三类标准的超标率达１００％。无机磷超一类标准的超标率达１００％，有个别测站超二类标准。ＣＯＤ、ｐＨ、ＤＯ、油类均低于一类海水标准。潮间带水质基本符合一类水质要求。

The current environmental quality of water and sediment in sea area near Daao, Liuheng Island was investigated in April, 1995 Environment quality index method are adopted to assess environmental quality conditions of water and sediment in the sea area The results shows that inorganic nitrogen and inorganic phosphorus seriously exceed the standard in the whole sea area 100% inorganic nitrogen values exceed the third grade standard 100% inorganic phosphorus values exceed the first grade standard and 0 2% values exceed the second grade standard COD, pH, DO and Oil are below the first grade standard Water quality in inter tidal zone basically accords with the first grade water quality requirement The contents of petroleum, sulfide and Organic material in sediment are quite lower, which shows higher quality of sediment in the sea area