한국재난정보학회 논문집 (Journal of the Society of Disaster Information)

  • 제16권3호
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  • Pages.586-593
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  • 2020
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  • 1976-2208(pISSN)
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  • 2671-5287(eISSN)
한국재난정보학회 (The Korean Society of Disaster Information)
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사방댐 위치 및 규모 결정을 위한 토석류 토사유출량 예측 알고리즘 개발

Development on Prediction Algorithm of Sediment Discharge by Debris Flow for Decision of Location and Scale of the Check Dam

  • Kim, Kidae (Department of Forest Disaster Management, National Institute of Forest Science) ;
  • Woo, Choongshik (Department of Forest Disaster Management, National Institute of Forest Science) ;
  • Lee, Changwoo (Department of Forest Disaster Management, National Institute of Forest Science) ;
  • Seo, Junpyo (Department of Forest Disaster Management, National Institute of Forest Science) ;
  • Kang, Minjeng (Department of Forest Disaster Management, National Institute of Forest Science)
  • 투고 : 2020.08.27
  • 심사 : 2020.09.18
  • 발행 : 2020.09.30
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초록

연구목적: 이 연구는 토석류로 발생하는 토사유출량 예측 알고리즘을 개발하고, 이를 활용한 GIS 기반 사방댐 적정배치 의사결정 지원 시스템 구현을 목적으로 하였다. 연구방법:평균 계류 폭과 길이를 이용한 누적 토사유출량 예측 방법에 초기 붕괴량과 이에 영향하는 집수길이를 입력인자로 활용하여 토석류로 인해 발생하는 누적 토사유출량 예측 알고리즘을 제시하였다. 연구결과: 알고리즘을 통해 산출된 예측 토사유출량과 실제 토사유출량은 평균 1.1배 차이가 나타나 정확도는 비교적 높았다. 또한 구현된 프로그램은 사방댐의 위치 및 규모를 결정하는 객관적인 지표로서 실무자의 합리적인 의사결정에 도움을 줄 수 있다. 결론: 사방사업이 매년 시행되고 있는 상황에서 합리적인 사방댐 위치 및 규모 결정을 통해 산지토사재해 방재에 기여할 수 있을 것으로 기대된다.

Purpose: This study aims to develop an algorithm for predicting sediment discharge by debris flow, and develop GIS-based decision support system for optimal arrangement of check dam. Method: The average stream width and flow length were used to predict the cumulative sediment discharge by debris flow. At this time, the amount of slope failure on source area and average flow length were utilized as input factors. Result: The predicted sediment discharge calculated through the algorithm was 1.1 times different on average compared to the actual sediment discharge by debris flow. In addition, the program is an objective indicator that selects the location and size of the check dam, and it can help practitioners make rational decisions. Conclusion: The soil erosion control works are being implemented every year. Therefore, it is expected that the GIS-based decision support system for location and size of the check dam will contribute to the prevention of sediment-related disasters.

키워드

참고문헌

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