2017 年 26 巻 4 号 p. 199-208
The objective of this study is to reveal an emergency information disclosure technique that reduces disaster risk of customer in the restoration period from the viewpoint of customers' controllability. In this study, questionnaire survey on information relevant to emergency responses in water sector was carried out on the Internet. Using the factor analysis, potential factors in the information disclosure during the restoration period were examined. As a result, five factors, named ‘trust to water utilities’, ‘controllability of disaster risk’, ‘disaster risk reduction’, ‘same understanding’, and ‘comprehensiveness of information’, were extracted. In addition, path diagram analysis of these five factors was conducted. Consequently, it was pointed out that information on water system in emergency with customers' controllability would result in to ensure reliability and trust to water utilities.