Abstract
Jiaozhou Bay is a semi-closed bay located in Shandong Province, China. Using investigation data on Chromium (Cr) in surface and bottom waters in April and July 1989, this paper analyzed the seasonal variation and vertical variation of Cr. Results showed that Cr contents in surface waters were in order of spring > summer. By means of vertical water’s effect, contents in bottom waters were in order of spring > summer. The variation ranges of Cr contents in spring were closed to summer. High contents of Cr in surface waters were diluted in bottom waters, while low contents in surface waters were diluted or accumulated in bottom waters. The changes of Cr contents in surface and bottom waters were demonstrated the rapid sedimentation process. By means of vertical migration, the horizontal distributions of Cr in surface and bottom waters were tending to be consistent. Furthermore, Cr contents were decreasing along with the migration paths.
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