2013 Volume 66 Issue 4 Pages 33-40
During 3 to 4 September in 2011, Typhoon 1112 passed through the western part of Japan and caused heavy rainfall across the Mt.Rokko. Amount of rainfall which Typhoon 1112 brought is comparable to the heavy rainfall occurred in July 1967 which is one of the biggest disaster of the Mt.Rokko. In this study, we analyzed the characteristic of rainfall around the Mt.Rokko using the telemeter rain gauge system and the X-band multi-parameter radar observation, and we studied the effect of Mt.Rokko to the occurrence of heavy rainfall. By the three-dimensional observations of the X-band multi-parameter radar, we found clearly that the number of rain clouds generated and developed on the southern area of the Mt.Rokko, then they are advected to the north and caused heavy rainfall on the Mt.Rokko. Moreover we suggested the rainfall amount was larger on the lee side of the Mt.Rokko than front side, and such orographical feature of rainfall was well simulated by meteorological model WRF.
