Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Rainfall and Runoff Characteristics on a Deciduous Forest Watershed in Mt. Ungsek, Sancheong

산청 웅석봉군립공원 내 활엽수림유역의 강수와 유출특성

  • Kim, Ki-Dae (Division of Forest Disaster Management, National Institute of Forest Science) ;
  • Choi, Hyung-Tae (Division of Forest Restoration, National Institute of Forest Science) ;
  • Lim, Hong-Geun (Division of Forest Restoration, National Institute of Forest Science) ;
  • Park, Jae-Hyeon (Dept. of Forest Resources, Gyeongnam National University of Science and Technology)
  • 김기대 (국립산림과학원 산림방재연구과) ;
  • 최형태 (국립산림과학원 산림복원연구과) ;
  • 임홍근 (국립산림과학원 산림복원연구과) ;
  • 박재현 (경남과학기술대학교 산림자원학과)
  • Received : 2016.12.01
  • Accepted : 2017.02.22
  • Published : 2017.03.31
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Abstract

This study aimed to investigate orographic precipitation and green dam (water conservation function) characteristics in a deciduous forest watershed in the region of Mt. Ungseok, Sancheong, Gyeongnam, South Korea. The rainfall and runoff of the watershed were monitored for six years (2011~2016) at the weather station and at the weir of the watershed, respectively. During the study period, the rainfall in the watershed (mountainous area) was larger than that of the meteorological station (flat area) nearest to the watershed. Besides, compared to the normal year (1981~2010), the rainfall has increased and the seasonal distribution of rainfall of the mountainous area has changed. These changes might have been caused by climate change. The runoff ratio was highest in spring, followed by winter, summer and fall, whilst the runoff was highest in summer, followed by spring, fall and winter. This difference seems to be due to the melting of snow in dry spring and intensive rainfall in summer. The total runoff in the watershed was calculated as $10,143.8ton{\cdot}ha{\cdot}yr^{-1}$.

본 연구에서는 경상남도 산청군 웅석봉군립공원 내 활엽수림유역을 대상으로 산악성 강수특성과 녹색댐 기능을 구명하기 위해 총 6년 동안(2011~2016년) 수문 모니터링을 실시하였다. 산지(시험유역)와 평지(산청 기상관측소)의 강수특성을 비교한 결과, 평지에 비해 산지에서 강수량이 많았으며, 산지에서 강수강도가 높은 것으로 볼 때 산악성 강수효과가 작용하는 것을 알 수 있었다. 또한 조사대상 기간(2011~2016년)은 평년(1981~2010)에 비해 강수량이 증가하였고, 계절적 강수분배 등이 변화한 것은 나타나 기후변화로 인해 산청지역의 강수환경도 변화한 것으로 나타났다. 한편, 유출률은 봄이 가장 높게 나타났고 겨울, 여름, 가을 순으로 나타났으며, 이는 산지적설과 융설의 영향으로 판단된다. 그리고 유출수량은 여름, 봄, 가을, 겨울 순으로 높았으며, 총 유출량은 $10,143.8ton{\cdot}ha{\cdot}yr^{-1}$로 산정되었다.

Keywords

References

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