Development of Real-time Oceanographic Information System for Long Line Hanging Aquaculture Farm and Temperature Variation in the Coastal Area of the East Sea

수하식 양식장용 실시간 해양환경 관측시스템 개발 및 동해 연안의 수온변동 특성

  • Yang, Joon-Yong (Fishery and Ocean Information Division, National Fisheries Research Development Institute) ;
  • Kim, Lim-Hak (Department of Energy Resource Engineering, Pukyong National University) ;
  • Lee, Joon-Soo (Fishery and Ocean Information Division, National Fisheries Research Development Institute) ;
  • Hwang, Jae-Dong (Fishery and Ocean Information Division, National Fisheries Research Development Institute) ;
  • Suh, Young-Sang (Fishery and Ocean Information Division, National Fisheries Research Development Institute) ;
  • Kim, Dae-Chul (Department of Energy Resource Engineering, Pukyong National University)
  • 양준용 (국립수산과학원 수산해양종합정보과) ;
  • 김임학 (부경대학교 에너지자원공학과) ;
  • 이준수 (국립수산과학원 수산해양종합정보과) ;
  • 황재동 (국립수산과학원 수산해양종합정보과) ;
  • 서영상 (국립수산과학원 수산해양종합정보과) ;
  • 김대철 (부경대학교 에너지자원공학과)
  • Received : 2010.09.17
  • Accepted : 2010.11.23
  • Published : 2010.11.30


Mass mortalities of cultivated organisms have occurred frequently in Korean coastal waters causing enormous losses to cultivating industry. The preventive measures require continuous observation of farm environment and real-time provision of data. However, line hanging aquaculture farm are generally located far from monitoring buoys and has limitations on installation of heavy equipments. Substituting battery pack for solar panels and miniaturizing size of buoy, newly developed system can be attached to long line hanging aquaculture farm. This system could deliver measured data to users in real-time and contribute to damage mitigation and prevention from mass mortalities as well as finding their causes. The system was installed off Gijang and Yeongdeck in Korea, measuring and transmitting seawater temperature at the sea surface every 30 minutes. Short term variation of seawater temperature, less than one day, in Gijang from June to July 2009 corresponded tidal period of about 12 hours and long term variation seemed to be caused by cold water southeast coast of Korea, particularly northeast of Gijang. Seawater temperature differences between Gijang station and the other station that is about 500 m away from Gijang station were $1^{\circ}C$ on average. This fact indicates that it is need to be pay attention to use substitute data even if it is close to the station. Daily range of seawater temperature, one of crucial information to aquaculture, can be obtained from this system because temperature were measured every 30 minutes. Averages of daily range of temperature off Gijang and Yeongdeok during each observation periods were about $2.9^{\circ}C$ and $4.7^{\circ}C$ respectively. Dominant period of seawater temperature variation off Yeongdeok was one day with the lowest peak at 5 a.m. and the highest one at 5 p.m. generally, resulting from solar radiation.


Long line hanging;Aquaculture farm;Oceanographic information;Real-time;Temperature variation;East Sea


Supported by : 국립수산과학원


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