Yang's marine bay filtration phenomenon on substance's content

This paper established definition and formula for horizontal and vertical changes of substance's contents were established, and provided a case study on plumbum (Pb) contents in Jiaozhou Bay 1987. Results showed that the horizontal absolute loss amounts of Pb contents in surface and bottom waters were 0.06 to 20.66 mu g L-1, and the horizontal relative loss amounts of Pb contents were 2.30 to 83.84%, respectively. The vertical accumulation amounts of Pb contents were 0.00 to 8.61 mu g L-1, and the vertical accumulation amounts were 0.00 to 68.38%. The vertical dilution amounts of Pb contents were 0.00 to 13.56 mu g L-1, and the vertical dilution amounts were 0.00 to 55.03%. The bay mouth was playing a role of a filter. Pb contents were difficult to be transported from the open waters to the bay, and were difficult to be transported from the bay to the open waters.This phenomenon determined by the special geographic and geomorphic conditions of the bay, was named as Yang's marine bay filtration phenomenon.