Abstract
The seasonal correlation of the same kind of heavy metal and the relationship between different heavy metals’ content were discussed, and the pollution characteristics of heavy metal were assessed by using the potential ecological risk index method. The results show that the content of heavy metals are higher in autumn and winter and lower in spring and summer. The content of Pb only has the significant correlation between autumn and winter at the 0.01 level. It has no significant correlation between the content of Cd, As, Pb and Cr in four seasons. The content of Cr and Pb is significantly correlated in winter at 0.05 level. The potential ecological risk level of Cd belongs to the slight ecological risk in spring and the medium ecological risk in the other seasons. The potential ecological risk level of As, Pb and Cr belong to the slight ecological risk in four seasons.
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