Based on a comparative study of the element content of stream sediments in various river months, gulfs and their provenances, the authors found that the enrichment coefficients of trace elements in the shallow sea environment have the variation regularity of K(Ni)＞K(Cr)＞K(As)＞K(Cu)＞K(Zn)＞K(Pb)＞K(Hg)＞K(Cd), suggesting that the migration mechanisms of various elements are somewhat different from each other. The regional enrichment coefficients of some elements deviate remarkably from their average values, implying that some elements have experienced additional input, most probably caused by the superposition of human pollution.