The results show as follows. 1) The level of eutrophication decreased from the inshore to the offshore in the bay and the percentage of COD, DIN and DIP in the nutrient status index accounted for 64.3%, 34.6% and 1.1% respectively.

• 研究表明 ；杭州湾营养状态指数由近岸向外海递减 ；COD、DIN和DIP在杭州湾营养状态指数的构成比例中分别占 6 4 .；3%25、34