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2025 Vol.58, Issue 5

Research Article

A comparative study on the deterioration rate of water distribution system based on corrosion depth estimation equations

부식깊이 산정식에 따른 상수도관망의 노후도 비교분석 연구

Hyeong Gi Kima
,
Cheol-Eung Leeb
,
Hyuk Jae Kwonc*
김 형기a
,
이 철응b
,
권 혁재c*
aPh.D, Department of Civil Engineering, Cheongju University, Cheongju, Korea
bProfessor, Department of Architectural, Civil, and Environmental Engineering, Kangwon National University, Gangwon, Korea
cProfessor, Department of Civil Engineering, Cheongju University, Cheongju, Korea
a청주대학교 토목공학과 박사
b강원대학교 건축･토목･환경공학부 교수
c청주대학교 토목공학과 교수
*Corresponding Author
31 May 2025. pp. 375-383
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Abstract

In this study, the deterioration rate of water distribution system was analyzed based on corrosion depth estimation equations. The corrosion depth estimation equation was selected based on the buried environment and corrosion characteristics, focusing on internal corrosion depth, which is deemed more critical for domestic water distribution systems. Initially, Romanoff's data which measured corrosion depth over the elapsed years for a single pipe, along with the domestic water supply design standards were used to establish the standard limit of water pipe usage at 0.2. Subsequently, MCS (Monte Carlo Simulation) was applied to randomly generate the numbers of the aging index determined. The cumulative damage of the water pipes was analyzed according to the service year, and the overall deterioration rate of the entire water distribution system was assessed and compared. The analysis results showed that the deterioration rate of the water distribution system varies significantly depending on the corrosion depth estimation equation, and it was confirmed that the long-term corrosion depth has a greater impact on aging than the initial corrosion depth.

Keywords
Water distribution system
Corrosion depth
Cumulative damage
Deterioration rate

본 연구에서는 부식깊이 산정식에 따른 상수도관망의 노후도를 분석하였다. 부식깊이 산정식의 경우 매설환경과 부식특성을 고려하여 선정하였으며 국내 상수도관망 상황에 더 중요하다고 판단된 내면 부식깊이를 고려한 연구를 진행하였다. 우선, 하나의 상수도관을 추적하여 매설경과년도에 따른 부식깊이를 측정한 Romanoff의 실측데이터와 국내 상수도설계기준을 사용하여 상수도관의 사용한계 기준을 임의의 수치인 0.2로 결정하였다. 이후 MCS (Monte Carlo Simulation)를 통해 부식깊이 산정식에 따라 결정된 노후지수를 모수로 사용하여 랜덤하게 난수를 발생시켜 상수도관의 매설 경과년도에 따른 누적피해도를 분석하였고, 전체 상수도관망의 노후도를 산정하여 비교 분석하였다. 분석결과, 상수도관망의 노후도는 부식깊이 산정식에 따라 큰 차이가 발생하는 것으로 확인되었고, 초기 부식깊이 보다 장기적인 부식깊이가 노후도에 더 중요한 영향을 미친다는 것을 확인할 수 있었다.

키워드
상수도관
부식깊이
누적피해도
노후도
References
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 58
  • No :5
  • Pages :375-383
  • Received Date : 2025-01-02
  • Revised Date : 2025-01-23
  • Accepted Date : 2025-02-03
  • DOI :https://doi.org/10.3741/JKWRA.2025.58.5.375
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