We study on the dynamic interaction with a simulated physical-biological coupled model response to nutrient reduction scenario in Jinhae Bay. According to the low relative errors, high regression coefficients of COD and DIN, and realistic distribution in comparison to the observation, our coupled model could be applicable for assessing the marine ecosystem response to nutrient input reduction in Jinhae Bay. Due to the new construction and expansion of sewage treatment plant from our government, we reduce 50% nutrient inputs near Masan Bay and sewage treatment plant. COD achieves Level Ⅱ in Korea standard of the water quality from the middle of the Masan Bay to all around Jinhae Bay except the inner Masan Bay remaining at Level Ⅲ. When our experiment reduces 50% nutrient inputs near Masan Bay and Dukdong sewage treatment plant simultaneously, COD decreases to about 0.1-1.2 mg/L (128°30’~128°40’ E , 35°05’~35°11’ N). The COD from the middle of the Masan Bay to Jinhae Bay achieves Level Ⅱ.

• Hyun Taik Oh(Marine Environmental Management Team, NFRDI) Corresponding Author
• Won Chan Lee(Marine Environmental Management Team, NFRDI)
• Jun Ho Koo(Marine Environmental Management Team, NFRDI)
• Sung Eun Park(Marine Environmental Management Team, NFRDI)
• Sok Jin Hong(Marine Environmental Management Team, NFRDI)
• Rae Hong Jung(Marine Environmental Management Team, NFRDI)
• Jong Soo Park(Marine Environmental Management Team, NFRDI)