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This paper analyzed the content, distribution, and sedimentation mechanism of Cd in Jiaozhou Bay based on investigation data in April, July and October 1985. Results showed that the Cd contents in surface waters ranged from 0.04-0.32 μg L -1 , and were meeting Grade I for Cd (1.00 μg L -1 ) in Chinese Sea Water Quality Standard, indicated that Jiaozhou Bay and the open sea had not been polluted by Cd in 1985. High Cd sedimentation locations were occurring in different regions due to Cd contents were different in surface waters. In April and October, high Cd sedimentation location was in the open sea in where marine current was the major source; while in July, high Cd sedimentation location was in the bay mouth in where stream flow was the major source. In generally, the spatial-temporal of sedimentation features of Cd were determined by pollution sources and the vertical water's effect.

Based on investigation data on Pb in surface waters in Jiaozhou Bay during 1979 to 1983, this paper analyzed the annual change of both contents and pollution levels of Pb. Results showed that Pb contents in surface waters in Jiaozhou Bay in 1979, 1980, 1981, 1982 and 1983 were 0.25-1.52 μg L -1 , 0.07-2.71 μg L -1 , 0.00-3.34 μg L -1 , 0.30-3.35 μg L -1 and 0.58-2.34 μg L -1 , respectively, indicated that his bay had been slightly of moderated polluted by Pb in 1979 to 1983, and the pollution level of Pb in Jiaozhou Bay was increasing since the reform and opening-up. The promotion of waste treatment and environmental protection was essential. The investigation data of this study would be basic information to the relevant scientific research on this bay.

This paper analyzed the content, distribution, source and background level of PHC in Jiaozhou Bay based on investigation data in April, July and October 1986. Results showed that the PHC contents in surface waters ranged from 0.005-0.122 mg L -1 , and were meeting Grade I/II (0.05 mg L -1 ) and Grade III (0.30 mg L -1 ) in Chinese Sea Water Quality Standard, indicated that the pollution level of PHC in Jiaozhou Bay was slight/moderate in 1986. Stream flow and marine current were the two major PHC sources, whose source strengths were 0.017-0.066 mg L -1 and 0.122 mg L -1 , respectively. The pollution of PHC in the open waters, by contrast, was higher than in

By investigation data in Jiaozhou bay waters from 1979 to 1986(absent of 1980), in spacial scale, by the analysis of the annual dataset, from the view of the content, and the horizontal, vertical and seasonal distributions of HCH, the study of the source, water quality, distribution and transfer state in Jiaozhou bay showed many results of the HCH transfer laws. In temporal scale, by the analysis of the five-year dataset from 1979 to 1986(absent of 1980), the study of the variation process of HCH in Jiaozhou bay showed the below results: the annual variation of the content, the change process of the source, the land transfer process, the water transfer process and the sedimentary process. These laws and process variations provided the solid theoretical base for the HCH transfer in the water body and edified for the study of the other organic compound transfer in the water body.

We studied the distribution, seasonal change, translocation, and source of heavy metal Pb based on the surface and bottom water sampling in Jiaozhou Bay in 1980 in order to know the condition of Pb before the industrial and agricultural development and to probe the distribution and translocation process of Pb. The results show that the range of Pb content in the surface in the whole bay was 0.07-2.71 μg/L, being below Grade Ⅱ of the China’s national water quality benchmark (5.00 μg/L). No Pb pollution was detected in the inner bay, while in the outer bay and the mouth, light Pb pollution. The Pb pollution in the bay waters was area sources. Horizontal and vertical distribution, and seasonal change indicated the translocation of Pb in the waters. Pb entered the water body at marine surface and sank at the marine bottom. Understanding the variable process of Pb in the bay provided the scientific clues for controlling Pb pollution from the human activities.