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Yang's Dynamic Structural Model for Matter Content in Marine Bay

Taking chromium (Cr) in Jiaozhou Bay as an example, this paper provided definition for environmental dynamic value and model for environmental dynamic model. Results showed that the definition for environmental dynamic value and model for environmental dynamic model provided scientific basis for establishing the criterion and dividing the variation rate for matter content in marine bay. In according to the horizontal distributions of Cr contents, waters in Jiaozhou Bay could be divided into three parts as low value region, mid value region and high value region, respectively. The environmental background value of Cr in 1981 were 0.48 µg L-1-0.88 µg L-1. By means of the dynamic value, basic background value, environmentl background value and source input value, the changing processes and trends of Cr contents could be easily defined.