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Estuaries and Coasts

, Volume 32, Issue 6, pp 1165–1175 | Cite as

Enhanced Benthic Nutrient Flux During Monsoon Periods in a Coastal Lake Formed by Tideland Reclamation

  • Seok-Hwi Kim
  • Kangjoo KimEmail author
  • Minhyung Lee
  • Hwa-Jin Jeong
  • Won-Jang Kim
  • Jong-Gyu Park
  • Jae-sam Yang
Article

Abstract

Sediment and water quality were investigated in an artificial coastal lake (Saemangeum Lake, Korea) that was formed by constructing a 33-km long sea-dyke offshore from the mouths of two adjacent rivers, which discharge into the Yellow Sea. Sediment showed drastic increases in fine fraction (silt and clay) after the dyke construction. TN, TP, and OC contents in the sediment showed the similar spatial variation to that of fine fraction. A mixing model indicated benthic fluxes of nutrients such as PO4, NH4, and SiO2, which were considerably elevated during the summer monsoon season. It is revealed that this phenomenon was associated with the development of strong salinity stratification, elevated water temperature, and increased groundwater discharge. However, a change in the sedimentation environment due to dyke construction is suggested as the primary reason for the enhanced benthic fluxes.

Keywords

Tideland reclamation Saemangeum Benthic flux Salinity stratification Groundwater discharge Organic-rich sediment 

Notes

Acknowledgements

The field data collection of this study was financially supported by the Saemangeum Project Office of Korea Rural Community & Agricultural Corporation, and the data interpretation and documentation were by the Brain Korea 21 Program (Advanced Geo-Environment Research Team). The authors thank Kihoon Park, Seong-Yup Jeong, Wan-Hee Hahn, Cheon-Seong Jeong, and Jeung-Tae Moon for their field and lab assistance.

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Copyright information

© Coastal and Estuarine Research Federation 2009

Authors and Affiliations

  • Seok-Hwi Kim
    • 1
  • Kangjoo Kim
    • 1
    Email author
  • Minhyung Lee
    • 1
  • Hwa-Jin Jeong
    • 1
  • Won-Jang Kim
    • 2
  • Jong-Gyu Park
    • 3
  • Jae-sam Yang
    • 3
  1. 1.Department of Environmental EngineeringKunsan National UniversityJeonbukKorea
  2. 2.Korea Rural Community & Agricultural CorporationJeonbukKorea
  3. 3.Department of OceanographyKunsan National UniversityJeonbukKorea

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