Open AccessThe effect of Cd Content from Different Sources on the Surface and Bottom of the Water Column
Author(s) -
Dongfang Yang,
Haixia Li,
Lin Ding,
Dong Yang,
Longlei Zhang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1653/1/012030
Subject(s) - bay , water column , surface water , oceanography , surface layer , environmental science , bottom water , geology , hydrology (agriculture) , layer (electronics) , chemistry , environmental engineering , geotechnical engineering , organic chemistry
According to the survey data from Jiaozhou Bay water area in 1992, the vertical distribution and monthly change of Cd content in surface and bottom waters from the center to the southern bay mouth of Jiaozhou Bay are studied, and the influence of source, change process and principle of Cd content in the surface and bottom are determined. The water body in the southeastern part of Jiaozhou Bay is considered to be a circular column of water. The main sea current carrying Cd content passed through the surface of the column, while the Haibo River carrying Cd content passed by the surface. The results show that the Cd content in the main sea current transport changed from low to high in October, May and August; and the content of Haibo River transport varied from low to high in August, October and May. Moreover, the Cd content in the surface layer of southeast bay changed from low to high in May, October and August, and the content in the bottom layer varied from low to high in August, May and October. This reflects the monthly change process of Cd content in the southeast bay waters with two significant characteristics. 1) In August, the Cd content transported through the main sea current and the content in surface water in the southeast of the bay at the same time reached the highest value. 2) In August, the Cd content transported through the Haibo River and the content in bottom water body in the southeast of the bay varied to the minimum value simultaneously. Therefore, the authors put forward the principle of monthly variation of Cd content on the surface and bottom of the southeastern bay. And the model block diagrams are established to show the change process and principle of matter content deposition and migration. The principle shows that from May to October, the Cd content transported through the main sea current determined that on the water column’s surface in the southeast bay, while the Cd content transported through the Haibo River did not affect the Cd content on the water column’s surface. From May to October, Cd content in the bottom of the water column was determined by that in the Haibo River transport, while Cd content in the main sea transport had no effect on that at the bottom of the water column.