Journal of Korean Society of Disaster and Security (한국방재안전학회논문집)

Korean Society of Disaster & Security (한국방재안전학회)
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Analysis of Appropriateness of Estimation Methods for Sediment Yields in Damaged Areas by Debris Flow

토석류 피해지역 토사유출량 산정 방법의 적정성 분석

  • Kim, Gi Jung (Graduate School of Disaster Prevention, Kangwon National University) ;
  • Jun, Kye Won (Graduate School of Disaster Prevention, Kangwon National University) ;
  • Kang, Bae Dong (Graduate School of Disaster Prevention, Kangwon National University)
  • 김기중 (강원대학교 방재전문대학원) ;
  • 전계원 (강원대학교 방재전문대학원) ;
  • 강배동 (강원대학교 방재전문대학원)
  • Received : 2022.03.20
  • Accepted : 2022.03.25
  • Published : 2022.03.31
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Abstract

In this study, the amount of debris flow was calculated through the empirical equations of RUSLE, NILIM, and Marchi, which are widely used to calculate areas affected by debris flow, and debris flow measured through precise measurements and field surveys was compared. The RUSLE method over estimated by 2.13 times in the average sense compared with the measured sediment quantify and Marchi's empirical equation over estimated by 2.83 times while NILIM's empirical equation 1.26 times, which is the lowest error among the three empirical equation.

본 연구에서는 토석류 피해 발생지역에 대해 토사유출량 산정에 많이 사용되고 있는 RUSLE와 NILIM 그리고 Marchi의 경험식을 통해 토사유출량을 산정하였으며, 토사유출량 산정 방법의 국내 적용성을 검토하기 위해 정밀측량 및 현장조사를 통해 측정된 토사유출량을 비교하였다. RUSLE 방법은 실측 토사유출량에 비해 평균 2.13배 과다 산정되었으며, Marchi의 경험식은 평균 2.83배, NILIM 경험식의 경우 평균 1.26배로 세 가지 경험식 중 가장 낮은 오차가 발생하였다.

Keywords

Acknowledgement

This paper work was financially supported by Ministry of the Interior and Safety as Human Resource Development Project in Disaster Management(C2001777-01-01).

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