Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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Analysis of Saltwater Intrusion by Flushing Discharge in the Seomjin River Estuary

Flushing 방류로 인한 섬진강 하구부 염수침입 영향분석

  • 노준우 (한국수자원공사 K-water연구원) ;
  • 이진영 (한국수자원공사 K-water연구원) ;
  • 신재기 (한국수자원공사 K-water연구원)
  • Received : 2011.01.28
  • Accepted : 2011.05.29
  • Published : 2011.06.30
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Abstract

Estuary is a transitional zone between river and ocean environment that receives the maritime and riverine influence simultaneously. Estuaries are the most productive habitats because their incoming water provides large quantities of nutrients. The Seomjin River estuary, located in the middle south of Korea, has no barrage and shows natural characteristic of estuary. However, due to dredging and reclamation the environment of the estuary has been changed significantly in the river mouth. In addition, increased freshwater intake in midstream of the Seomjin River results in salinity intrusion. In this paper salinity variation in downstream estuary of the Seomjin River has been simulated and tested using EFDC model. The results of simulation were compared with measured data collected at three points, Culture & Art Center, Sumjin Iron Bridge, and Mokdori, located at 9Km, 14Km, and 15.5Km respectively from downstream estuary. Based on the simulated results, the contribution of the flushing discharge has been evaluated in preventing the salinity intrusion by increasing the discharge flowrates released from the Juam dam.

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References

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