2022 Volume 77 Issue 5 Pages I_193-I_202
As water supply infrastructures are aging, the maintenance and management of them are becoming serious issues, especially for small-scale water systems in depopulated areas where the population is declining and aging. At present, it is assumed that the issues will be solved by expanding the centralized water supply system, which is the water network in urban areas, for depopulated areas. However, the solution has a problem such as spending huge time and cost. On the other hand, it is made possible to provide water by independent and distributed small water supply systems through being developed new technology. In this paper, we carried out the cost burden analysis to introduce each water supply system by estimating water demand based on the results of population forecasting, and clarified which is more efficient. As a result, we showed that the centralized system impose a huge cost to construct pipeline network, and clarified the adoptable setting cost of independent and distributed small water supply system for assuming the same cost burden as the current water supply in urban area.
