Transfer Mechanism and Change Process of Matter Content in Jiaozhou Bay

Based on the survey data of Jiaozhou Bay in 1992, the changes of Pb content in the surface and bottom waters affected by the ocean current in the process of transportation in Jiaozhou Bay were studied, and the sedimentation process and mechanism of Pb content in the surface and bottom waters were determined. The time change process of sedimentation shows that: from May to October, 1) the Pb content transported by the ocean current from the main sea decided the Pb content change in the bottom water; 2) in August, under the carrying of a large number of plankton and suspended particulate matter, the Pb content transported by the ocean current and that in the surface and bottom water reached the maximum value in a year. According to the spatial change process of subsidence, the results show that in August and October, the inlet of the “Cangkou Channel”, the outlet of the “Former Reef Channel” and the deep channel of the strait on the side of Xuejia Island all revealed narrower channel, accelerated current, and deep erosion, forming a deep channel. In such waters, a large amount of Pb content was deposited. On the basis of the sedimentation process in the center of the bay, the outer sea current carried a high content of Pb to surround the nearshore waters in the bay. In May, the main sea current did not affect the surface water in the center of Jiaozhou Bay, nor did it affect the bottom water in the center of Jiaozhou Bay. From May to October, the ocean current didn’t affect the surface water in the center of Jiaozhou Bay, either, but it has brought a huge impact on the bottom water in the center of Jiaozhou Bay. In the transfer process of Pb content in the water body in the center of the bay, the authors put forward the transfer mechanism of the matter content in Jiaozhou Bay, and establish the block diagram of the modelwhich demonstrates the mechanism and the change process of the matter content transfer.