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Evaluation System of River Levee Safety Map for Improving River Levee Maintenance Technology

하천제방 유지관리 기술의 고도화를 위한 하천제방 안전도맵 평가체계 제안

  • Kim, Jin-Man (Geotechnical Engineering Research Institute, KICT) ;
  • Moon, In-Jong (Geotechnical Engineering Research Institute, KICT)
  • Received : 2017.10.26
  • Accepted : 2017.12.08
  • Published : 2017.12.31

Abstract

The efforts to improve river levee maintenance technologies have accelerated globally in a bid to deal with the flood damage resulting from the changes to the climate and flood events. This paper, in line with such tendency, proposes an evaluation system of a river levee safety map to maintain the river levee in an efficient manner. The concept of a river levee safety map is aimed at maximizing the maintenance efficiency for a manager to indicate the safety index, including the current river levee sliding, piping, and visual inspection on a GIS map. To develop such an evaluation system, a safety index covering the sliding, piping, and visual inspection are designated through the data and document examination and the rational guideline to classify each index into three grades, A, B, and C, is proposed. Based on the guideline proposed, the sliding and piping characteristics in terms of safety depending on the change to the flood water level duration time at the test section (Nam river) were evaluated by numerical analysis. As a result, both the protected landside and riverside satisfied the requirements for Grade A in terms of sliding, and when it comes to piping, the grade declined to C because the flood water level duration time increased at R2. As a planning study to propose a river levee safety map evaluation system, a further advanced study, standardization of the river levee data, and improvement of the existing system and laws are required.

세계 각국은 기후 및 홍수사상의 변화와 이에 따른 각종 수재해 시나리오에 대응하기 위하여 하천제방 유지관리기술을 고도화하고 있는 추세이다. 이러한 세계적 동향에 따라 본 연구에서는 하천제방을 효율적으로 유지관리할 수 있도록 하천제방 안전도맵 평가체계를 제안하고자 한다. 하천제방 안전도맵의 개념은 현행 하천제방의 활동, 파이핑, 육안점검 등의 안전도 지표를 GIS맵 상에 지도형태로 표출함으로써 하천관리자의 유지관리효율을 극대화하는 것이다. 이러한 평가체계를 구축하기 위해서 관련 문헌 및 자료 조사를 통해 활동, 파이핑, 육안점검 등 주요 안전도 지표를 선정하였으며, 각각의 안전도 지표를 A, B, C 등 3등급으로 평가할 수 있는 합리적인 기준을 제시하였다. 제시된 기준을 바탕으로 수치해석을 활용하여 시범구간(남강)에 대한 홍수위지속시간 변화에 따른 활동 및 파이핑 안전도 특성을 평가하였다. 시범평가 결과, 활동의 경우 제내외지 구분 없이 모두 A등급을 만족하였으며, 파이핑의 경우 R2에서 홍수위지속시간이 증가함에 따라 파이핑 등급 C등급으로 감소하는 경향을 확인하였다. 본 연구는 하천제방 안전도맵 평가체계를 제안하는 기획연구로서 하천제방 안전도맵 평가체계를 구축하기 위해서는 추후 개선된 추가 연구, 하천제방 자료의 표준화, 제도 및 관련 법 개선 등이 필요할 것으로 판단된다.

Keywords

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