Reviewing the Long-Term Sustainability of Urban Water System Rehabilitation Strategies with an Alternative Approach

被引:9
作者
Bruaset, Stian [1 ]
Rygg, Hakon [2 ]
Saegrov, Sveinung [1 ]
机构
[1] Norwegian Univ Sci & Technol, Dept Water & Environm, N-7491 Trondheim, Norway
[2] Multiconsult, N-0276 Oslo, Norway
来源
SUSTAINABILITY | 2018年 / 10卷 / 06期
关键词
strategic asset management; sustainability; life cycle; long-term planning; rehabilitation strategy; LIFE-CYCLE ASSESSMENT; ENVIRONMENTAL ASSESSMENT; INFRASTRUCTURE SYSTEMS; INVESTMENT DECISIONS; ASSET MANAGEMENT; PERFORMANCE; NORWAY; MODEL; NETWORKS; PATHWAY;
D O I
10.3390/su10061987
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
It is generally difficult to assess the performance of an infrastructure with a substantially longer life span than economic models can handle, and the life cycle concepts in urban water systems are normally limited to single-asset projects. In order to explore the long-term impact of urban water infrastructure rehabilitation strategies, a life cycle approach for survival functions is suggested. A life cycle factor based on survival functions is introduced, which is a measuring value of the total expected service life of all pipes within a group of pipes. Another factor, termed the sustainability factor, is based on the relationship between the life cycle factor and a rehabilitation reference method, which makes it possible to correct the long-term performance of rehabilitation methods based on their expected service life provision. A case study presents the implications for investments in infrastructure rehabilitation when applying the sustainability factor in long-term planning, and shows the importance of considering the service life of rehabilitation methods when planning renewal interventions that minimize costs over their life cycles.
引用
收藏
页数:30
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