Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Short Term Runoff Characteristics Change of Stream Water Quality with Different Rainfall Events in Planted Coniferous Forest

침엽수 인공림에서 강우사상별 계류수 수질의 유출특성 변화

  • Kim, Jaehoon (Dept. of Forest Restoration, Korea Forest Research Institute) ;
  • Choi, Hyung Tae (Dept. of Forest Restoration, Korea Forest Research Institute) ;
  • Yoo, Jae Yun (Dept. of Aquatic Ecosystem facilities, Korea Environment Corporation)
  • 김재훈 (국립산림과학원 산림복원연구과) ;
  • 최형태 (국립산림과학원 산림복원연구과) ;
  • 유재윤 (한국환경공단 수생태시설처)
  • Received : 2015.10.20
  • Accepted : 2015.12.01
  • Published : 2015.12.31
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Abstract

This study was carried out to investigate solutes concentration change with respect to discharge change in coniferous forest experiment watershed in Gyeonggi-do, Korea. From 2005 to 2008. Precipitation, discharge, solutes has been analyzed from 23 precipitation events. The results showed that low API induced low discharge. $NH_4{^+}$, $K^+$, and $Ca^{2+}$ were indicated by clockwise and $Cl^-$ and $NO_3{^-}$ were represented by counterclockwise hysteresis loop. ${SO_4}^{2-}$, $Na^+$, $Mg^{2+}$ showed no hysteresis loop pattern. $Cl^-$, $Na^+$, $NH_4{^+}$ was relatively constant due to groundwater during precipitation, $NO_3{^-}$ was increased due to soil water compared to early precipitation. $Cl^-$, ${SO_4}^{2-}$, $Na^+$, $Mg^{2+}$, $Ca^{2+}$ was diluted with respect to increased discharge and $NO_3{^-}$ was diluted in early precipitation and then increased in the end. $NO_3{^-}$ and $Ca^{2+}$ eluviated in early precipitation. This characteristics was presumed by the effect of API, discharge and ground water.

본 연구는 침엽수 인공림에서 강우와 유출에 따른 계류수 용존이온의 특성 밝혀보고자, 경기도 국립수목원 소재의 침엽수 시험림에서 강우, 유량, 용존이온을 조사하였다. 2005년 6월부터 2008년 9월까지 총 23개의 강수사상별 수질시료를 채수하여 분석한 결과 API 값이 낮을수록 유출량이 적었다. 유량변화에 따른 용존이온 특성으로는, $NH_4{^+}$, $K^+$, $Ca^{2+}$ 이온은 시계 방향, $Cl^-$, $NO_3{^-}$ 이온은 반시계 방향의 이력곡선을 나타냈으며, ${SO_4}^{2-}$, $Na^+$, $Mg^{2+}$ 이온은 이력현상을 보이지 않았다. $Cl^-$, $Na^+$, $NH_4{^+}$는 지하수의 영향으로 강수 이전 수준으로 농도가 유지되는 것으로, $NO_3{^-}$는 토양수의 영향으로 강수 이전 보다 높은 농도는 나타내는 것으로 판단된다. $Cl^-$, ${SO_4}^{2-}$, $Na^+$, $Mg^{2+}$, $Ca^{2+}$ 이온은 유출량 증가에 따라 강한 희석반응을 보였고, $NO_3{^-}$ 이온은 유출초기 희석 후 농도가 증가하였다. $NO_3{^-}$, $Ca^{2+}$ 이온은 강수 초기에 세탈효과를 나타냈다. 유출량 변화에 따른 이러한 농도변화 특성은 선행강수, 유출량, 지하수 등의 영향으로 판단된다.

Keywords

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