DAMAGE ESTIMATION OF WATER SUPPLY FACILITIES BY TSUNAMI INDUCED BY NANKAI TROUGH EARTHQUAKE

Abstract

 This paper deals with damage estimation of water supply facilities by tsunami induced by Nankai Trough Earthquake. A questionnaire survey was conducted to 136 waterworks bureaus located near seacoast where maximum tsunami height is estimated at more than 20m in Nankai Trough Earthquake. Location of intake facilities and purification plants, and countermeasure against tsunami in each waterworkas bureau were clarified by the questionnaire survey. Then not only structural damage but also functional damage to water supply facilities were estimated by using location of the facilities, and tsunami heights and inundation area estimated by cabinet office.