A debris-flow detection system is installed for continuous observation.
Hokkaido University is developing a method to remotely detect debris flows after volcanic ash fall. The photo shows active sediment movement on the outer rim of Mt. Usu after the 2000 eruption, the installation of a debris-flow detection system, and an image captured by this system showing remote detection of debris flow generation.
In addition to the continuous observation of debris flow generation by the system, optical and multispectral images are regularly acquired by UAVs (drones) to monitor sediment transport and surface changes on the mountainside. This data is used to study various factors that contribute to debris flow generation from different perspectives.
Mt. Usu is one of the most active volcanoes in Hokkaido, having erupted frequently in recent years. The photo shows the slope of the outer rim of Mt. Usu, where active sediment transport is still occurring.
The debris flow detection system was installed. The photo shows the assembly of unloaded parts and the installation of the camera, water level gauge, rain gauge, and other related equipment.
The river channel is monitored in real time. The photo is a captured video image of a debris flow that occurred on July 29, 2024, at approximately 8:00 AM.
