Effects of PHC on Water Quality of Jiaozhou Bay II Changing Process of Pollution Sources

Based on investigation data on PHC content in Jiaozhou Bay,China during 1979-1983,the horizontal distribution and pollution sources of PHC in Jiaozhou Bay were analyzed. The results showed that from 1979 to 1983,PHC in the water body of Jiaozhou Bay was mainly from rivers such as Haibo River,Licun River and Loushan River,and PHC content ranged from 0.10 to 1.10 mg/L. The pollution sources of PHC were serious during 1979-1981 and then became slight during 1982-1983. From 1979- 1981 to 1982-1983,PHC content,horizontal distribution and degree of pollution sources changed,but the input mode of PHC was constant,that is,PHC was brought into Jiaozhou Bay by rivers.