粤东柘林湾海域人工鱼礁投放前海水环境质量分析与评价

Analysis and assessment of environmental quality in seawater before construction of artificial fish reefs around Zhelin Bay in East Guangdong,China

2007年9月丰水期间对广东省饶平县柘林湾附近海域七星礁和虎屿2个拟建人工鱼礁区海水环境质量进行了调查分析,分别采用水质单项标准指数法、综合污染指数WQI法、富营养化评价法和有机污染评价法对该海域海水环境质量进行了比较分析和评价。结果表明:该调查海域海水中主要污染物为石油类和重金属Pb,平均浓度分别为0.075 mg/L和6.35μg/L,超过《海水水质标准》(GB 3097-1997)中的第二类海水水质标准;此次调查海域单项污染指数、综合污染指数、富营养化指数和有机污染指数的平均值分别为0.53、1.4、0.18和-0.25,其中七星礁海域水质总体良好,虎屿海域水质整体处于轻度污染,根据《海水水质标准》(GB3097-1997)中的第二类海水水质标准评价,调查海域均无富营养化和有机污染状况出现。

According to the construction plan of the artificial fish reef in Guangdong coast,a water quality investigation in the high flow period before establishment of artificial fish reefs was taken in Zhelin Bay near Raoping Sea in Guangdong Province in Sep.2007.Based on the water quality investigation data,using single water quality parameter model,integrated water quality index model,organic pollution index model and eutrophication assessment model,the environmental quality of investigation sea area was assessed.The results showed that the key pollutants were total petroleum hydrocarbons（TPH） and heavy metal Pb,with their average concentrations of 0.075 mg/L and 6.35 μg/L,respectively.Among them,the concentration of the above pollutants all exceeded the second standard of sea water quality（GB 3097-1997）.The averages of single parameter pollution index,integrated water quality index（WQI）,organic pollution index（A） and eutrophication index（E） were 0.53,1.4,0.18,and-0.25,respectively.In general,the water quality of Qixingjiao Reef was in good station and the water quality of Huyu Islet were in light pollution.Based on the second standard of sea water quality（GB 3097-1997）,the index A and E declared that there was not the phenomenon of water eutrophication or organic pollution in the stations.