Life cycle cost analysis of water supply infrastructure affected by low rainfall in Ethiopia
Life cycle cost analysis of water supply infrastructure affected by low rainfall in Ethiopia
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DOI：
10.2166/washdev.2017.026
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发表时间：
2017-12
影响因子：
1.7
通讯作者：
S. Godfrey;G. Hailemichael
中科院分区：
文献类型：
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作者：
S. Godfrey;G. Hailemichael
本文挑战了这样的假设：与较高成本的资本支出投资相比，低成本的资本支出（资本支出）供水基础设施可以降低生命周期成本。该假设是通过比较埃塞俄比亚中央高地阿姆哈拉地区两个地区的点源供水（伴随紧急支出 - EMMEX 投资 - 紧急水车运输、处理和分配）和管道供水系统 10 年的财务数据（2006 年至 2016 年）来应用的。该研究得出的结论是，在 10 年的项目期间，获取浅层地下水的点源供水平均有 60 个月处于不起作用状态。为了补充非功能期间的供水需求，在 10 年内提供了紧急水车运输和处理服务，人均费用为 2,257 美元。相比之下，项目期 20 年的人均管道供水成本为 65 美元。该研究得出的结论是，当在生命周期成本分析中考虑资本支出和紧急供水供应成本时，管道供水比点源供水便宜。
This paper challenges the assumption that low cost CAPEX (capital expenditure) water supply infrastructure provides reduced life cycle costs when compared with higher cost CAPEX investments. The assumption is applied through a comparison of 10 years of financial data (2006–2016) from point source water supplies (accompanied by Emergency Expenditure – EMMEX investments – emergency water trucking, treatment and distribution) and piped water supply systems in two districts of the Ethiopian Central Highland region of Amhara. This study concluded that on average point source water supplies accessing shallow groundwater were non-functional for an average of 60 months in a project period of 10 years. To supplement the water supply demand during the non-functionality period, emergency water trucking and treatment was provided over a 10 year period at a per capita cost of USD 2,257. In comparison, the per capita cost of piped water supplies was USD 65 for a project period of 20 years. The study concluded that piped water supplies are less expensive than point source supplies when CAPEX and emergency water supply provision costs are considered under a life cycle cost analysis.