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Sabo project 2007

Outline of Sabo project 2007



  • Fujikawa river basin area: 3,990Km2 (3,571.2Km2 excluding Numa river)
  • Fujikawa Sabo control area: 786.2Km2( Kamanashi river : 277.1Km2 , Haya river : 509.1Km2 )
  • Summation of river length: 1,660Km (Summation of 493 rivers in Fuji river area)
  • Average bed slope: Kamanashi river approx.1/2
    Fuefuki river approx.1/31
    Fuji river approx.1/269


The Fujikawa River Basin Sabo Office is protecting people's lives from sediment disasters by Sabo dams, groundsill, hillside works and other works. Those constructions being operated in harmony with surrounding nature and ecosystem also help create a new environment along the river and stimulate the community.




Basic Landslide Disaster Countermeasures

Control the production and flow of soil and sand from denuded land that includes large-scale landslide scars, and prepare basic erosion control facilities of basin headwaters in order to ensure the safety of the entire basin. status of landslide scar at Ainodake
status of landslide scar at Ainodake


Overall Soil and Sand Management Countermeasures

Work in cooperation with organizations affiliated with rivers and shorelines or the like to perform a survey relating to the quantity and physical properties of sand and soil in all of the basin from the headwaters to the river mouth; prepare open type erosion control dam; and ensure disaster prevention while promoting comprehensive soil and sand management countermeasures that guarantee the supply of soil and sand downstream, throughout the Fuji River Basin. Steel-piped frame Sabo dam
Steel-piped frame Sabo dam
Prior to Ishiutoro River 6th Erosion Control Dam and Slit After Ishiutoro River 6th Erosion Control Dam and Slit
Prior to Ishiutoro River 6th Erosion Control Dam and Slit After Ishiutoro River 6th Erosion Control Dam and Slit


Comprehensive Landslide Disaster Preventative Countermeasures

Prepare optical fiber for collecting and providing information and cameras for monitoring the flow of soil and rocks as a soft countermeasure to avoid the occurrence of major injury and loss of human life that occurs during a landslide disaster. Establish Ooharuki monitoring camera(left)

Rainfall Information Display Board(right)

Establish Ooharuki monitoring camera(left)


Persons Requiring Support during Disasters

Prepare facilities for preventing landslide disasters in order to protect welfare facilities for those who require support during disasters because they have difficulty evacuating by themselves. Area to be conserved
Area to be conserved


New Technologies and New Construction Methods

Work to reduce facility costs and the burden on the environment by using new coarse gravel concrete and erosion control CSG construction methods using soil and sand generated at the facility location. Fuji River rough gravel concrete construction method
Fuji River rough gravel concrete construction method


Natural Symbiosis Model

Implement environmental monitoring andpreparation of erosion control dam that take into consideration the natural environment, ecology, and landscape in national parks or the like. Hiroiwa Groundsel group
Hiroiwa Groundsel group


Typical sabo works


Comprehensive Sediment disaster Preventive Measures

The Fujikawa River Basin Sabo Office is working on the "Comprehensive Sediment Disaster Preventive Measures" in which they are to predict occurrence of debris flows from precipitation,enabling a municipal corporation to take prompt action for evacuation.