Abstract
Using investigation on Cadmium (Cd) in surface and bottom waters in this bay during 1984-1988 (in absence of 1987), this paper analyzed the horizontal distributions of Cd, calculated the absolute and relative settlement and accumulation of Cd. Results showed that the settlement of Cd was rapid, resulting in the consistency of Cd contents in surface and bottom waters. In case of little source input, Cd contents in waters were very homogeneous with a small differenct of 0.01 µg L−1. The absolute and relative settlement amounts of Cd were 0.14-6.47 µg L−1 and 70.0-99.8%, respectively. The absolute and relative acumulation amounts of Cd were 0.10-1.29 µg L−1 and 55.5-100.0%, respectively. The settlement/accumulation of Cd in bottom waters were high/low in case of Cd contents in surface waters were high/low. Furthermore, in order to demonstrate the migration processes of substances in marine bay, we provided Yang’s Clearing-up Feature, as well as the mathematical expression.
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