研究区域为珠江三角洲一条典型城市污染河道，采集了13个站位沉积物、上覆水、间隙水及底栖动物样品进行分析。
Samples of sediment , overlying water , pore water , and benthic invertebrate were collected at13 stations along a typical municipal polluted river in the Pearl River Delta .
间隙动物