Measuring the Reliability, Safety and Sustainability of the Water Supply Utilities in Japan

By : M.L.U.K. Piyasena, T. Oyama

Page No: 1-37

Abstract
Water-supply network systems are an indispensable social infrastructure in modern society. Therefore, water supply utilities require high system robustness towards both accidents and natural disasters. In this study, we define a work performance indicator (WPI) to quantitatively measure the robustness of water supply utilities (WSU) in Japan. The WPI was defined from three perspectives: reliability, safety, and sustainability. Based on actual data expressing the work performance of Japanese WSU from 1980 to 2018, we illustrate the numerical results of WPIs to determine their regional characteristics. We applied statistical data analysis techniques such as multivariate regression analysis, cluster analysis, and principal component analysis to calculate the WPIs and investigate the historical and regional characteristics and trends of WSU in Japan during the investigated period. These approaches can be applied to the design and improvement of natural disaster mitigation policies, such as those focused on earthquakes in Japan.

Authors:
M.L.U.K. Piyasena And T. Oyama
National Graduate Institute for Policy Studies (GRIPS), 7-22-1 Roppongi, Minato-ku, Tokyo, Japan
 

DOI: https://doi.org/10.32381/IAPQRT.2024.48.01-02.1