Based on investigation dada on Pb in April, June, July and October 1982, this paper analyzed the transportation of Pb in Jiaozhou Bay. Results showed that atmosphere deposition, ocean current from the offshore, and the transportation of the head of the islands were the major sources of Pb. These different sources determined different transportation processes of Pb, displayed seasonal variations of Pb content and distribution.

Based on the investigation data of Plumbum (Pb) in surface waters in Jiaozhou Bay in April, August and November 1981, this paper analyzed the content, distribution and source of Pb. Results showed that Pb contents in April, August and November ranged from 0.20-2.65 μg. L-1, 0.79-3.34 μg. L-1 and 0.00-3.00 μg. L-1, respectively, all of which were lower than Grade II (5.00 μg.L-1) in according to National Standard of China for Seawater Quality (GB3097-1997). Agricultural non-point source and urban point source were the major pollution source of Pb in spring (growing season) and autumn (dry season), respectively; while both point and non-point sources were responsible in summer (wet season).

Based on the investigation data of Chromium (Cr) in Jiaozhou Bay waters in1981, this paper analyzed the content, distribution and sources of Cr in Jiaozhou Bay. Results showed that the contents of Cr were lower than 50.00 μg.L-1 in the full year, as reached Grade I in according to National Standard of China for Seawater Quality (GB3097-1997). Stream discharge from the major rivers was the unique pollution source for Cr. Cr contents in estuaries and offshore areas ranged from 0.48-32.32 μg.L-1 and 0.18-1.85μg.L-1, respectively.

Based on investigation dada on Cr in 1982 in Jiaozhou Bay, this paper analyzed the seasonal and spatial distribution of Cr, and revealed the transfer process of Cr. Results showed that horizontal diffusion and vertical sedimentation were major transfer processes of Cr, which were mainly determined by water exchange and gravity settling. These findings were essential to pollution control and environmental remediation in Jiaozhou Bay. From the point of view of pollution control, reducing the discharge of Cr from the sources was the major countermeasure.

Based on the investigation data of mercury (Hg) in waters in Jiaozhou bay during time peroids of 1979 to 1985 (absent of 1984), this paper tried to analysis the seasonal variations of Hg in Jiaozhou Bay, to reveal the transfer process of Hg, and to provide basis for decision-making of pollution control. Results showed that, there was indistint seasonal variations of Hg content, due to anthropogenic discharge was the major source of Hg, which was not static, but depended on industrial adjustment. The land transfer process of Hg could be divided into three major processes: 1) human discharges of Hg to soil, waters, and atmosphere, etc., 2) Hg is washouted and delivered into streams, and 3) Hg is transferred to ocean via river channel runoff. In order to reconcile economic growth with environmental protection, we should have to improve the use ratio of Hg, and to reduce the discharge load of Hg.