Waterworks facilities inevitably experience some amount of leakage even if there is a lot of investment or state-of-the-art technology that is applied such as DMA(District Metered Area) system construction, leakage detection, repair, pipe rehabilitation, etc. The primary reason is the leakage is naturally restored over time. In the UK, this restoration characteristic is defined as NRR(Natural rate of rise of leakage) and used to decision making for prioritizing active leakage control of DMAs. However, this restoration characteristic is well recognized, but researches on NRR in the water distribution system are insufficient in Korea. In this study, the estimation method of NRR was developed suitable for applicating in Korea considering of SCADA data, water infrastructure, and water usage patterns by modification of the UK's NRR method. The proposed method was applied to 9 DMAs and verified it's applicability by comparing with the other water loss performance indicators. It is expected that the proposed method can be used to support decision making for sustainable NRW(Nor-revenue water) management in the water distribution system.

ABSTRACT
1. 서 론
2. 연구방법
    2.1 누수복원량 산정절차
    2.2 적용대상
3. 결과 및 고찰
    3.1 누수복구 현황 및 평균 누수량 분석
    3.2 누수복원량 산정 결과
    3.3 관로노후도(간접평가) vs. 누수복원량간 상관관계 분석
4. 결 론
References

• 진샘물(서울시립대학교 환경공학과, K-water 맑은물운영처) | Saemmul Jin (Environmental engineering, University of Seoul, K-water)
• 김경필(K-water 연구원 맑은물연구소) | Kyoungpil Kim (K-water Research Institute)
• 구자용(서울시립대학교 환경공학과) | Jayong Koo (Environmental engineering, University of Seoul) Corresponding author