夏季辽东湾表层沉积物中的硫化物含量分布与区域性差异

The Distributions and Regional Differences of Sulfide Content in Surface Sediments of Liaodong Bay in Summer

为查明辽东湾海域表层沉积物中硫化物的含量分布、污染程度以及区域性差异，2013年8月（夏季）对整个辽东湾海域进行了1个航次的现场调查。调查结果显示，辽东湾表层沉积物中硫化物含量为7．91～218．36 mg/kg ，平均含量为90．51 mg/kg。与我国其他海域的比较发现，辽东湾表层沉积物中硫化物的污染程度相对较轻，其含量自辽东湾北部的双台子河河口海域向南逐渐增大，总体呈现南部高、北部低，近岸高、远岸低的分布特征。聚类分析表明，辽东湾调查站位可分为四类典型区域，硫化物含量表现为辽东湾东南部＞辽东湾东西近岸海域＞辽东湾中部海域＞辽东湾北部河口区域。

Sulfide in surface sediments of Liaodong Bay was surveyed in summer on August of 2013 ,for knowledge of the pollution status ,distribution characteristics and regional differences in sulfide content in this area .The results showed that the contents of sulfide were varied from 7 .91 to 218 .36 mg/kg in sur-face sediments of Liaodong Bay ,with the average content of 90 .51 mg/kg .Compared with other areas in China ,the degree of pollution of sulfide in the surface sediment was relatively low .Sulfide content in-creased gradually from the mouth of the Shuangtaizi River to the south ,and the further away from the coast ,the higher it was .The sulfide content in the South was higher than in the north overall .Clustering analysis showed that Liaodong Bay was divided into four kinds of typical region by sulfide content ,with the southeastern area〉the coastal area〉the middle area〉the estuary area .