Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Soil Moisture Monitoring at a Hillslope Scale Considering Spatial-Temporal Characteristics

봄, 가을철 시공간적 특성을 고려한 사면에서의 토양수분 거동파악

  • Oh Kyoung-Joon (Dept. of Environmental Engrg., Pusan National Univ.) ;
  • Lee Hye-Sun (Dept. of Environmental Engrg., Pusan National Univ.) ;
  • Kim Do-Hoon (Dept. of Environmental Engrg., Pusan National Univ.) ;
  • Kim Hyun-Jun (Dept. of Water Resources Research, Korea Institute of Construction Technology) ;
  • Kim Nam-Won (Dept. of Water Resources Research, Korea Institute of Construction Technology) ;
  • Kim Sang-Hyun (Dept. of Environmental Engrg., Pusan National Univ.)
  • 오경준 (부산대학교 환경공학과) ;
  • 이혜선 (부산대학교 환경공학과) ;
  • 김도훈 (부산대학교 환경공학과) ;
  • 김현준 (한국건설기술연구원 수자원연구부) ;
  • 김남원 (한국건설기술연구원 수자원연구부) ;
  • 김상현 (부산대학교 공과대학 환경공학과)
  • Published : 2006.07.01
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Abstract

In order to analyze movement of soil moisture, Time Domain Reflectometry(TDR) with multiplex system has been installed at the Bumreunsa hillslope of Sulmachun Watershed to configure spatial-temporal variation pattern considering seasonal characteristic. An intensive surveying was performed to build a refined digital elevation model(DEM) and flow determination algorithms with inverse surveying have been applied to establish an efficient soil moisture monitoring system. Soil moisture data were collected through an intensive and long term monitoring 380 hrs in November of 2003 and 1037 hrs in May and June of 2004. Soil moisture data shows corresponding variation characteristics of soil moisture on the up slope, buffer, main channel zones of the hillslope which were classified from terrain analysis. Measured soil moisture data were discussed in conjunction with flow characteristic through terrain analysis. Regardless season, immediate responses of soil moisture about rainfall looks similar but recession and recharge are primary characteristics of intermediate soil moisture variation for spring to summer and fall to winter season, respectively.

토양수분의 거동을 파악하기 위해서 설마천 유역의 범륜사 사변에 TDR(Time Domain Reflectometry)을 설치하여 시공간적, 계절적 특성을 파악하였다. 대상유역을 정밀 측량하여 수치지형 모형(Digital Elevation Model)을 구축하고 이를 흐름분배 알고리즘에 적용하여 흐름범위 안에서 역측량을 통해서 측정지점을 선정하여 모니터링 시스템 을 구축하였다. 2003년 11월에 380시간, 2004년 5월 6월에 1037시간 동안의 장기적인 집중 모니터링을 통해 토양수분 자료를 획득하였다. 획득한 토양수분 자료는 지형분석을 통해 상부와 중간지점, 수로지점으로 구분하여 변화 특성을 파악하였다. 지형분석을 통한 흐름특성과 토양수분 실측치의 유의성을 논의하였다. 토양수분은 계절별 강우에 대한 변화 양상은 비슷하나 봄에서 여름으로 가는 시기에는 감쇄 현상이, 가을에서 겨울로 가는 시기에는 충전현상이 일어나는 것을 알 수 있었다.

Keywords

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