What kinds of works does Fuji Sabo Office do?

Protecting Lives from Disasters

Project effectiveness

Information infrastructure development

Since the start of the sabo project under the direct control of the Fuji Sabo Office, the debris flow and Snow melting caused by the Osawa River, Kurinokisawa, Kazamatsuri River, etc. have been captured by the Osawa sand basin, sabo dams, and Excavated sediment trap works in the downstream area. I have been able to prevent disasters in Japan.

In recent years, debris flows occurred in November 2000 and December 2004, but in both cases, the sabo facilities in the Osawa playground captured the sediment and there was no damage to the downstream area.

Occurred on December 8, 1992 Snow melting

【December 8, 1992 Snow melting Kurinoki No. 4 Dam】

Snow melting occurred on Mt. Fuji, causing damage such as the destruction of the mountain climbing safety center at the 6th station of Osawaguchi on the Yamanashi prefecture side.Even within the jurisdiction of our office, snow charges occurred due to snow melting in Kurinokisawa, and reached the Kurinoki Dam construction group downstream.

Occurred on December 8, 1992 Snow melting

【Occurred on March 30, 1996 Snow melting Kazamatsuri river sediment basin】

An avalanche occurred on Mt. Fuji, causing damage such as the Fuji Subaru Line being cut off at three locations.
Even within the jurisdiction of our office, snow charges occurred due to snowmelt, and 18,000 m3 of earth and sand was captured by the Kazematsuri sand basin.

Debris flow that occurred on November 21, 2000

【Osawa sand basins 8th Groundsills Sedimentation status】

【It flowed down to the Osawa sand basins Megalith over 2m】

【Osawa sand basins sedimentation situation】

Due to the heavy rain that continued from November 20th to 21st, 2000, the largest debris flow in the history of observation, which originated from the Osawa Failure, occurred.

Due to this debris flow, about 280,000 m3 of sediment was deposited in the Osawa sand basins.

The next page explains the effective use of earth and sand.