This study was carried out to analyze water suspension in the water supply system through fault tree analysis. And quantitative factors was evaluated to minimize water suspension. Consequently the aim of this study is to build optimal planning by analyzing scenarios for water suspension.Accordingly the fault tree model makes it possible to estimate risks for water suspension, current risks is 92.23 m3/day. The result of scenario analysis by pipe replacement, risks for water suspension was reduced 7.02 m3/day when replacing WD4 pipe. As a result of scenario analysis by water district connections, the amount of risk reduction is maximized when it is connecting to network pipe of D Zone. Therefore, connecting to network pipe for D Zone would be optimal to reduce risk for water suspension.

• 최태호(한국수자원공사 K-water연구원) | Taeho Choi (K-water Research Institute, Korea Water Resources Corporation)
• 김아리(서울시립대학교 환경공학과) | Ari Kim (Dept. of Environmental Engineering, University of Seoul)
• 김민철(서울시립대학교 환경공학과) | Mincheol Kim (Dept. of Environmental Engineering, University of Seoul)
• 구자용(서울시립대학교 환경공학과) | Jayong Koo (Dept. of Environmental Engineering, University of Seoul) Corresponding author