流域特性を考慮した流木対策の提案

抄録

Debris wood, created by landslides that follow heavy rainfall, damages downstream bridges and other structures. In 2017, heavy rains in the northern area of Kyushu triggered such damage. A nationwide project commencing recognized the urgent need for effective countermeasures. Here, we develop comprehensive measures to prevent debris wood damage at the basin level. We extracted debris wood damage risks by reference to earlier damage reports. We explored the correspondence between runoff characteristics and such damage. Finally, we developed a basin-wide policy that features debris wood countermeasures by referring to basin characteristics.