Input features of Petroleum Hydrocarbon in Jiaozhou Bay

Based on investigation dada on Petroleum Hydrocarbon (PHC) in April, August and November 1981 in Jiaozhou Bay, this paper analyzed the content, surces and input feature of PHC. Results showed that the content of PHC in study area ranged from 0.011-0.889 mg.L-1, and the highest value in April, August and November were 0.861 mg.L-1, 0.889 mg.L-1 and 0.176 mg.L-1, respectively. PHC was mainly input to the bay by way of the major inflow rivers. Point source was dominating in dry season in Jiaozhou Bay, while both point and non-point sources were responsible in wet seasons. The pollution level of PHC was slight in dry season, while in wet season was severe. In April, the high risk areas of PHC content were occur in areas closed to the mouth of Haibo River. In August, the high risk areas of PHC content were expanded to areas closed to the mouths of Haibo River, Licun River and Dagu River.