The estuary of Nakdong river is very influenced by the freshwater contained nutrients and organic materials. The response results of these influences are eutrophication and red tide outbreak in this region.
Concentration of chlorophyll a was 0.78∼62.55㎍/L in February, 1.20∼21.29㎍/L in April, 1.88∼188.35㎍/L in June, and 0.78∼11.21㎍/L in August, respectively. The decrease of chlorophyll a is considered that residence time is shorten by increase of freshwater discharge, and unfavorable growth condition of phytoplankton is created by diffusion of low salinity and increase of turbidity.
The phytoplankton maximum region located inner side of this estuary during winter season, whereas it was moved to outer side when mean discharge of the Nakdong river was increased. Therefore, the variation of phytoplankton maximum region was affected by input discharge from the Nakdong river basin.

• 이대인 | Dae In Lee
• 홍석진 | Suk Jin Hong
• 이석모 | Suk Mo Lee
• 박청길 | Chung Kil Park