TSUNAMI PROPAGATION INTO RIVERS IN TOHOKU AREA DURING THE 2022 TONGA VOLCANO-TSUNAMI

Abstract

 Tsunami intrusion into river is investigated in this study. Investigation and analyses were conducted based on water level measurement data and distance from the river mouth at several rivers in Miyagi Prefecture during the 2022 Tonga Volcano-Tsunami. These data were used to discuss the influence of river mouth morphology on the tsunami height and propagation distance. In addition, an empirical method is applied for estimating dissipation coefficient. The value from the present study shows good comparison with an empirical formula proposed by the authors based on field data during the 2011 Tohoku Tsunami.