Calculation of Loss Amount from Southeast of the Bay to West of Bay Mouth

Abstract

Using survey data of Pb in water body from southeast of Jiaozhou Bay to west of bay mouth, in August 1992 and according to the horizontal change model and the vertical change model of matter content put forward by authors, we calculate the horizontal loss amount, vertical diluted amount and vertical sediment amount of Pb in surface and bottom layer and determine the model diagram of Pb content horizontal and vertical changes. The results showed that in water body from southeast of Jiaozhou Bay to west of bay mouth in August, the absolutely horizontal loss amount of Pb content in surface layer and bottom layer was 4.32 - 5.29μg/L, and the relatively horizontal loss amount of Pb content was 28.01 - 38.23%. The absolutely vertical sediment amount of Pb was 6.61 - 7.58μg/L in both surface and bottom layer, and the relatively vertical sediment amount was 40.14 - 48.63%. In the surface water in August, the main sea current carrying Pb content moved through a ring of nearshore water when the Pb content in the surface and bottom layer deposited to the seabed in large quantities. During the horizontal migration of Pb content in the surface and bottom waters, the loss amount of Pb content in the surface layer and bottom layer reached almost 30.00% and that in the surface layer even reached almost 40.00%. It revealed that the high content Pb on the surface could rapidly and continuously settle to the seabed almost 30.00% of the Pb content in the water remained at the bottom of Jiaozhou Bay. In August, in the process of vertical migration, the Pb content transported by main sea current was relatively high. From the waters in the southeast of the bay to the waters in the west of bay mouth, the vertical sediment amount of Pb content in the surface and bottom increased from 40.14% to 48.63%, and the deposition of high Pb content accumulated in the seabed of Jiaozhou Bay.