Construction of Sabo Facilities and their Effects

After the occurrence of a debris flow on July 1998, a debris flow has occurred every year. For this reason, Mie Prefecture is promoting the construction of sabo facilities at Nishinogaito River and Kotaki River, while removing sediments accumulated at sabo dams to protect residents from debris flow disasters.

July 29, 1998: A debris flow occurred at Nishinogaito River.

Nishinogaito River No. 1 Dam was constructed.

August 19 and September 24, 1999: Debris flows occurred at Nishinogaito River and Kotaki River.

Nishinogaito River No. 1 Dam and Kotaki River No. 1 Dam captured debris flows.
Nishinogaito River No.2, 3, and 4 Dam were constructed.
Kotaki River No. 1 Dam was raised, and Kotaki River No. 2 Dam was constructed.
Accumulated sediments at Nishinogaito River No. 1 Dam and Kotaki River No. 1 Dam were removed.

Sabo dams that had been constructed from 1999 to 2002 captured debris flows.

July 9-10, and 17, 2002: Debris flows occurred at Nishinogaito River and Kotaki River.

Nishinogaito River No. 3, 2, 1, and 4 dams and a left branch river dam captured debris flows.

Kotaki River No. 2 and No. 1 dams captured debris flows.

The following works were employed as part of a disaster-related emergency sabo project.
Increasing the height of Nishinogaito River No. 1 and 4 dams, construction of training dikes Construction of sand pocket works downstream Kotaki River No. 1 Dam

Accumulated sediments at Nishinogaito River No. 1, 2, 3, and 4 dams and Kotaki River No. 1 and 2 dams were removed.

Sabo facilities that were constructed under the disaster-related emergency sabo project captured debris flows.

August 8-9, 2003: Debris flows occurred at Nishinogaito River and Kotaki River.

Nishinogaito River No. 3, 2, 1 dams captured debris flows.

Kotaki River No. 2 and No. 1 dams captured debris flows at sand pocket works.