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Rivers and Erosion Control

Rivers

In order to ensure the safe and secure living of people against natural disasters recently happened, Dainichi plans and designs such physical measures as river improvement works as well as disaster evacuation and mitigation measures. Dainichi also proposes nature-oriented river works and creation of beautiful scenery for the purpose of leaving the beautiful rivers to posterity,

Services

  • River channel planning, inland water planning
  • Development of inundation area maps / hazard maps
  • Design of hydraulic structures
  • Planning of nature-oriented river works
  • Creation of beautiful river scenery
  • River works in collaboration with local residents

Nature-oriented river works

River works in collaboration with local residents

Design of river scenery

Erosion and Sediment Control

Recently in Japan, it has become one of the important issues to prevent the landslide disaster due to torrential rains and to ensure safe and secure living of people. Dainichi provides such tangible measures as surveys, planning and designs of erosion and sediment control facilities as well as intangible measures of setting of sediment disaster alert areas.

Services

  • Development of erosion and sediment control master plans
  • Preliminary and detailed design of erosion and sediment control facilities
  • Setting of sediment disaster alert areas, design of measures against sediment disaster
  • Setting of special warning zones
  • Investigation and inspection of erosion and sediment control facilities
  • Design of fishways

Steel-made slit dam

Design of fishways

Volcanic sediment and erosion control

Maintenance and Management

There are a lot of seriously damaged and deteriorated riverbank protections, erosion and sediment dams, and hydraulic gates, which have insufficient seismic resistance. In order to ensure the safe use of these facilities for extended period of times, Dainichi conducts inspection and investigation of these facilities, development of life-extending repair plans, and repair and strengthening designs.

Services

  • Inspection and investigation of defects, damage and deterioration
  • Seismic inspection
  • Development of life-extending repair plans
  • Design of seismic retrofitting
  • Repair design
  • Strengthening design

Inspection of sluice way and pipe

Inspection of sluice pipe

Inspection of erosion and sediment control dam