The nutrition state was evaluated with eutrophication index by DIN, PO 4 P and COD for Sansha Bay.

• 并以DIN、PO4 P、COD为富营养化评价指标 ；用营养状态指数评价该湾水体的营养状态 .；以水质综合评价指数对该湾的水质状况进行了评价