Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Characteristics of Allochthonous Organic Matter in Large Dam Reservoir, Lake Soyang

소양호에서 외부기원유기물의 유입, 유출 특성

  • Park, Hae-Kyung (Water Environment Research Department, National Institute of Environment Research) ;
  • Kwon, Oh-youn (Korea Ocean Research and Development Institute) ;
  • Jung, Dong-Il (Water Environment Research Department, National Institute of Environment Research)
  • 박혜경 (국립환경과학원 물환경연구부) ;
  • 권오윤 (한국해양연구소) ;
  • 정동일 (국립환경과학원 물환경연구부)
  • Received : 2010.10.28
  • Accepted : 2010.12.29
  • Published : 2011.01.30
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Abstract

To identify the inflow and outflow characteristics of allchthonous organic matters and examine the change of allochthonous organic matter load pattern due to the climate change, we investigated the temporal variations of DOC and POC concentrations within inflow water and dam discharge water and spatio-temporal distribution of POM within the lake water in Lake Soyang which is the largest dam reservoir in Korea in 2006. Most of allochthonous DOC flowed into the lake water during initial rain and was not affected by the amount of precipitation, whereas most of allochthonous POC flowed into during concentrated heavy rain and the concentration of POC was significantly associated with the amount of inflow water and precipitation. Calculated annual allochthonous organic matter loads in Lake Soyang from 2003 to 2006 using the regression equation between the amount of inflow water and the concentration of POC indicate allochthonous organic matter loads are mainly affected by total influx and extreme influx of inflow water. The spatio-temporal distribution of POM indicated allochthonous organic matter of inflow river during flood period in July transported from upper part to middle and lower part of the lake a month later respectively along the middle layer of water column in Lake Soyang.

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References

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