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A development of information infrastructure for correspondence using fiber optics cable is planned for the purpose of preventing and managing river disaster in the region of Tokachi riverside. Not only the completion of disaster prevention system but also the regional promotion effects will be brought if the regional information network system making use of the space of tunnel for fiber optics cable is developed. In this study, a questionnaire survey with respect to regional information networkdoi:10.2457/srs.32.3_305 fatcat:dmmfik4duveyblkup3ntzo5i4q