[S09] Driftwood and Levee

[58] ANALYSIS ON TREND OF DRIFTWOODS GENERATION CONSIDERING RAINFALL TREND CHANGE IN THE DEVASTIATED AREA DUR TO THE NORTHERN KYUSHU HEAVY RAIN IN 2017

*Takahiro Shogaki¹, Chiho Kobayashi², Akiyoshi Tsusue³, Yasuyuki Maruya², Shinichiro Yano², Kiyonobu Kasama² (1. General Insurance Rating Organization of Japan, 2. Kyushu University, 3. West Japan Engineering Consultants, Inc.)