Since sewer rehabilitation program requires long construction period and enormous capital investment, determination of rehabilitation priorities is important with systematic planning considering appropriate evaluation parameters. In this research, we applied PROMETHEE(Preference Ranking Organization METHod for Evaluations) known as very objective and scientific multi-criteria decision-making analysis, using the weights determined by AHP(Analytic Hierarchy Process) for the selected sewer evaluation items to calculate the rehabilitation priorities for each sewer sub-catchment in basin Gusan 1 of Seoul. Preference functions and preference thresholds were estimated for each criterion of ratio of lack of hydraulic capacity of sewers, defect ratio, ratio of sewers with velocity less than its minimum criteria, and density of sewers in the sub-catchment. As a result, it was found that region d had the first priority among four sub-catchments. For each and every sewer located in region d, we could also rank sewers to be rehabilitated urgently.

ABSTRACT
1. 서 론
2. PROMETHEE 기법
3. 사례연구
    3.1 연구대상지역
    3.2 소구역별 면단위 정비 우선순위 결정을 위한 평가항목의 선정과 가중치 결정
    3.3 관로구간별 정비 우선순위 결정을 위한 평가항목의 선정과 가중치 결정
    3.4 데이터 프로세싱
4. 결과 및 토론
    4.1 소구역별 면정비 우선순위의 결정
    4.2 관로구간별 선단위정비 우선순위의 결정
5. 결 론
References

• 안호성((주)삼안) | Hosung Ahn (Saman Inc.)
• 유순유(한국산업기술대학교 지식융합학부) | Soonyu Yoo (Department of Consilience, Korea Polytechnic University)
• 이태훈(단국대학교 토목환경공학과) | Taehoon Lee (Department of Civil and Environmental Engineering, Dankook University)
• 박규홍(중앙대학교 사회기반시스템공학부) | Kyoohong Park (School of Civil and Environmental Engineering, Chung-Ang University) Corresponding author