The results showed that both of water enverionment and biotic enverionment were good, and surface sediment enverionment was polluted in middle level besides that of some stations were seriously polluted, in which C_d plaied a main role in pollution.

• 结果表明,水质环境和生物环境处于良好水平;表层沉积环境处于污染水平,有的站达到严重污染水平,其中重金属镉的贡献率最大。