CASE STUDY ON EARTHQUAKE-FLOOD COMPOUND DISASTER

Abstract

 The occurrence of earthquake and flood compound disaster in Japan was investigated by collecting the data of earthquake intensity and levee breach due to flood. The frequency of earthquake occurrence in 2000s was almost consistent with that in 2010s, while the frequency of levee breach due to flood in 2010s was greater than that in 2000s. In addition, the frequency which the yearly-maximum water level exceeded the design high-watar level has been increased since 2000s. Consequently, the time-interval between earthquake occurrence and levee breach in 2010s was shorter than that in 2000s, indicating that the possibility of occurrence of earthquake-flood compound disaster may increase.