Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

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Evaluation of the Applicability of Sediment Discharge Measurement in Mountain Stream using the Load-cell Sensor

Load-cell Sensor를 이용한 산지 토사유출량 계측의 현장 적용성 검토

  • Seo, Jun-Pyo (Division of Forest Disaster Management, National Institute of Forest Science) ;
  • Lee, Ki-Hwan (Department of Forest Resources, Yeungnam University) ;
  • Kim, Dong-Yeob (Division of Forest Disaster Management, National Institute of Forest Science) ;
  • Woo, Choong-Shik (Division of Forest Disaster Management, National Institute of Forest Science) ;
  • Lee, Chang-Woo (Division of Forest Disaster Management, National Institute of Forest Science) ;
  • Lee, Heon-Ho (Department of Forest Resources, Yeungnam University)
  • 서준표 (국립산림과학원 산림방재연구과) ;
  • 이기환 (영남대학교 산림자원학과) ;
  • 김동엽 (국립산림과학원 산림방재연구과) ;
  • 우충식 (국립산림과학원 산림방재연구과) ;
  • 이창우 (국립산림과학원 산림방재연구과) ;
  • 이헌호 (영남대학교 산림자원학과)
  • Received : 2017.09.25
  • Accepted : 2018.01.05
  • Published : 2018.01.31
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Abstract

Landslides occur frequently due to the effects of heavy rainfall and typhoons caused by climate change. Erosion control measures are needed to effectively prevent landslide damage. In order to improve their efficiency, it is necessary to quantitatively measure the sediment discharge from the mountain stream. In this study, a load cell sensor was installed in a mountain stream and the measured values were compared according to the applicability and load test type in the mountain stream. The result of the load test showed that the effect of the loading type (load test 1, 2) was low at average (loadings) of 0.4kgf and 0.6kgf at sites 1 and 2, respectively. The load factor was also derived by regression analysis to increase the accuracy of the measured values. According to the results of the load factor (normalized) to the load-cell measurement value, the output value increased by 14.8% and 24.6% in sites 1 and 2, respectively, and was calculated to be similar to the reference value. The load cell sensor enabled us to quantitatively estimate the amount of sediment discharge in the mountain stream through time series analysis with the water level and rainfall information. If the monitoring is carried out for a long time, it can be used to find the sediment discharge mechanism for the mountain stream. In addition, applying sensors such as load-cells to a mountain stream is expected to contribute to the development of related industries, such as the manufacturing of measurement sensors.

최근 기후변화로 인한 집중호우, 태풍 등의 영향으로 산사태가 빈번히 발생하고 있다. 산사태를 예방할 수 있는 효율적인 방법은 사방사업이다. 이러한 사방사업의 효율성을 높이기 위해서는 산지에서 유출되는 토사량에 대한 정량적 측정이 필요하다. 본 연구에서는 산지계류에 Load-cell 센서를 설치하고, 분동테스트를 통하여 계류에서의 적용성과 재하 형태에 따른 출력값을 비교하였다. 개별 및 복합 하중시험을 실시한 결과, Site 1에서 평균 0.4kgf, Site 2에서 평균 0.6kgf 차이로 재하 형태의 영향은 낮게 나타났다. 또한 측정값의 정확도를 높이기 위해 하중계수를 산정하였다. 하중계수를 Load-cell 측정 값에 적용하여 보정한 결과, 두 사이트에서 출력율이 각각 14.8%p, 24.6%p 상승하여 기준값에 근사하게 산정되었다. Load-cell 센서는 수위, 강우 등과 함께 시계열 분석을 통하여 산지 토사유출량을 정량적으로 산정할 수 있었다. 모니터링이 장기간 이루어진다면 산림유역에 대한 토사유출 매커니즘 구명에도 활용할 수 있을 것이다. 또한 Load-cell과 같은 센서를 산지 계곡에 적용함으로써 계측센서 등 관련분야 산업 발전에 기여할 수 있을 것으로 기대된다.

Keywords

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