The numerical simulation on variation of phytoplankton maximum region in the estuary of Nakdong river -I. The state of variation of phytoplankton maximum region-

낙동강 하구해역의 식물플랑크톤 극대역 변동에 관한 수직시뮬레이션 -I. 식물플랑크톤 극대역 변동 현황-

  • 이대인 (부경대학교 환경공학과)
  • Published : 2000.10.01

Abstract

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$\mu\textrm{g}$/L in February 1.20~21.29$\mu\textrm{g}$/L in April 1.88~188.35$\mu\textrm{g}$/L in June and 0.78~11.21$\mu\textrm{g}$/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 risver was increased, Therefore the variation of phytoplankton maximum region was affected by input discharge from the Nakdong river basin.

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