Environmental Quality Assessment and Trend Analysis of Petroleum in Offshore Area Influencing by Reclamation

Marine environment is an essential aspect for sustainable development and ecologic civilization. Oil pollutant has tremendous damage for marine environment and ecology. So research on the distribution and trend of petroleum has meaningful for guiding the environmental management. In this paper, the distribution and trend of petroleum in marine environment waters and sediments is studied to guide and improve the level of environmental impact assessment in the Caofeidian marine district, Tangshan Bay, China. The natural neighbor grid method and the least squares fitting method are used for the distribution and the trend respectively. The cloud model is applied to assessment single factor environmental quality of petroleum. The research results show that the part of petroleum in marine waters exceeds the forth level of water quality standard. The sediments belongs to the first level of sediments standard. The trend of petroleum is on the rise in marine waters and is on the decline in sediments. The comprehensive level of single factor environmental quality is general in research district.