Source Strength Ratio and Source input Ratio of Cd in Marine Bay

Using investigation on Cadmium (Cd) in surfac waters in Jiaozhou Bay during 1984-1988, this paper researched seasonal variations of Cd contents and the variations of the source inputs, identified the source strength ratio and source input ratio, and displayed the changing processes of Cd. Restult showed that the major sources of Cd in Jiaozhou Bay were marine current, river runoff and atmosphere depostion, and the source strengths were 0.12-6.48 µg L⁻¹, 0.12-1.07 µg L⁻¹, 0.04 µg L⁻¹, respectively. The seasonal variations of Cd contents were mainly determined by the seasonal variations of the source inputs. Marine current was the strongest Cd source and source input in Jiaozhou Bay during 1984-1988, yet the source strength and source input of atmosphere deposition could be considered as very slight. The highest value of Cd contents and Cd inputs in this bay was mainly determined by marine current. (paper)