文蛤滩涂养殖海域水体有机污染综合评价

Analysis of Nutrient Status and Assessment of Organic Pollution in Seawater in Meretrix Habitat

分别于2010年3月(冬季)、5月(春季)、8月(夏季)和11月(秋季)调查了江苏省南通沿岸的文蛤滩涂养殖区内10个站位的水体中COD、无机氮、活性磷酸盐以及DO的时空分布,并选用海洋有机污染评价指数法、单项指标评价法、富营养化指数法以及潜在富营养化指数法对调查海域的有机污染状况和富营养化水平进行了评价。结果表明,5月(春季)水质已经受到严重的有机污染和重度富营养化状况。但整个海域周年水质则受到轻度有机污染,水质状况总体上处于中度富营养化水平,同时还受到不同程度的磷限制潜在性富营养影响。

Based on the environmental data surveyed in March, May,August and November in 2010,the temportal and spatial distribution of nu- trients and eutrophicaiton level and organic pollution in the seawater of Meretrix habitat in Jiangsu Province were studied. By the analysis on ma- rine organic pollution index, single - item and the nutrient status index, the seawater quality assessment was established. It was indicated that the sea waters were eutropic wih exception of inorganic nitrogen thas was high than the eutropic standard. The result showed that the water quality, which was more seriously polluted by inorganic nitrogen,was comparatively hight eutropic in May. In general, the organic pollution is slight and the quality of waters is good, but the nutritional level of the waters is medium eutropic,which reached the eutrophication level of potential eutroph- ic with phosphorous limiting.