芝罘西湾COD浓度变化和相关分析的初步探讨

Using the method of the correlation analysis this paper discusses the relations between COD concentration change and the tide in the western Zhi Wu Gulf of Yan Tai. The tropic equation was given. It can be seen that the correlation between the concentration of COD and the tide level is minus in the north of this Bay. However it is positive in the south of this Bay. The concentration of COD in oreases with the increases of mean range of tide. The concentration of COD for flood tide is less than it for ebb current in the north of the Bay and vice verse in the south of the Bay.