Development of Rehabilitation and Management Techniques for Old Water Distribution Systems

기존 상수도 노후관망의 개량 및 관리 기법의 개발

  • 김중훈 (고려대학교 토목환경공학과) ;
  • 김종우 (고려대학교 토목환경공학과 박사과정, 한국건설기술연구원 환경연구실 선임연구원, 한국수자원공사 수도운영처 대리)
  • Published : 1996.06.01

Abstract

Flow carrying capacity of water distribution systems is getting reduced by deterioration of pipes in the systems. The objective of this study is to develop a managerial decision-making model for the rehabilitation of water distribution systems with a minimum cost. The decisions made by the model also satisfy the requirements for the discharge and pressure at demanding nodes in the system. The replacement cost, pipe break repair cost, and pumping cost are considered in the economic evaluation of the decision along with the break ratio and interest ratio to determine the optimal replacement time for each pipe. Then, the hydraulic integrity of the water distribution system is checked for the decision by a pipe network simulator, KYPIPE, if the discharge and pressure requirements, the decision made for the optimal replacement time is revised until the requirements are satisfied. The model is applied to an existing water distribution system, the Metropolita Water Supply Project (1st Phase). The result shows that the decisions for the replacement time determined by the economix analysis are accepted as optimal and the hydraulic integrity of the system is in good condition.

상수도 관망시설에서 각 관로는 시간이 경과함에 따라 각종 부식이 일어나 통수능이 저하된다. 그러므로 적절한 시기에 갱생이나 교체 등의 처리를 해주어야 한다. 본는 연구에서는 각 수요절점에서 요구수량, 요구압력 등 수리학적 조건을 만족시켜주며 동시에 최소의 비용으로 노구된 관로를 처리해주는 의사결정모형을 개발하였다. 교체비용, 관파열보수비용, 양수비용, 관 파열율, 연이율 등은 각 관로의 교체시기를 경제적으로 결정하는데 이용된다. 그리고 배수시설의 수리학적 만족여부는 관망계산 프로그램 KYPIPE에 의해 점검된다. 시스템이 수리학적 조건을 만족지 못할 경우 교체시기는 조건이 만족될 때까지 앞당겨진다. 본 모형은 기존 송배수시설인 수도권 광역상수도 제1단계에 적용되었다. 모형을 이용해 산출한 최적교체시키는 수리학적으로 모의해본 결과 문제가 없으며를 알 수 있었다.

Keywords

References

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