A Survey on the Consumers' Willingness to Pay to Enhancing Earthquake Resistant of Water Distribution Pipes by Contingent Value Method from a view of Risk Communication

Abstract

The rate of earthquake resistant of water facilities is said to be lower, concretely speaking, about 12% for distribution pipes main on average in Japan. So it's getting more important to decide the level of resistant against earthquake. In this study we did questionnaires to the citizens showing the relationship between the cost of replacing old pipes and the risk of water suspension from a view of risk communication. The results of analyses show that maximum permissible limit for water suspension is about 2 to 3 days and willingness to pay for enhancing earthquake resistant is about 400 to 800 higher than it already is. But with the willingness, it is impossible to fulfill their permissible limit, so risk communication such as CAUSE model is necessary.