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5th International Conference on Rain Water Cistern Systems
"Rainwater Catchment for Future Generations"
Keelung, Taiwan, R.O.C. - August 1991

Section 6: Socioeconomic Aspects and Cost Analysis

Page 324

A Method Of Economic Appraisal Of Rain Water Cistern Systems As Applied To High-Rise Buildings

Dr.Adhityan Appan
Nanyang, Technological University, Singapore


The revival of Rain Water Cistern Systems (RWCS) and their adaptability for application in high-rise buildings are of relatively recent origin. A p::ime mover for acceptance of RWCS in high-rise buildings by both society and any water authority is to establish the economic viability of such systems. In this paper, the capital,and operating costs fcr an RWCS in high-rise buildings are considered. The benefits are limited to savings in water utilized and the deferring of capital-intensive schemes due to this saving. The methodology used for the latter is the "Unit Cost of Leakage" approach. A typical case study is costed in the Singapore context to establish the net benefits that can be reaped by adopting such RWCS in high-rise buildings.

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