The Eutrophication Evaluation and Cause Analysis in Jiangsu Coastal Sea Area

The research was carried for present environmental situation investigation in Jiangsu coastal area by using methods of Comprehensive Pollution Index and Eutrophication Index.The results showed that different levels of eutrophication were found on 50% monitoring sites.Inorganic nitrogen and activated phosphate were main pollutants in sea waters of Jiangsu and contributed nearly 50% pollution.At present eutrophication was caused by land river contained nitrogen and phosphorus substances.The TN discharge increased to 284%,TP 451% from large rives into sea in Jiangsu province,which pollutants had grown remarkably than that had done at end of the tenth five years planning.