Study on debris flow behavior in alluvial fan area considering influence of structures: disaster prevention measures with effective maintenance

2014 Fiscal Year Final Research Report

• Project/Area Number: 24710206
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Natural disaster science
• Research Institution: Kyoto University
• Principal Investigator: NAKATANI Kana 京都大学, (連合)農学研究科(研究院), 助教 (80613801)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 土石流 / 扇状地 / 構造物 / 影響範囲 / 防災

Outline of Final Research Achievements

In this study, we conducted disaster verification, model experiments, and numerical simulation to determine the influence of structures on alluvial fan area; such as houses, fences, and roads. From this study, we found that when houses exist, remarkable deposition occurred in upstream of the houses, and the flow direction changed around houses and along roads. Furthermore, we found that the arrangement of the debris flow torrent and structures on alluvial fan affect the influence area. We proposed a system that can examine the disaster prevention measures of the entire village in alluvial fan, and showed that method considering the structures is effective to examine the damage area and evacuation on debris flow hazards.

Free Research Field

砂防学