Hydraulic model tests under comparable conditions to actual ocean conditions are important for the prediction of coastal environmental changes when maritime structures such as artificial islands, floating offshore platforms, etc., are built.
The large-scale wave basin and wave flume installed in the facility have made it possible to reproduce waves and currents similar to real ocean conditions.

Large-Scale Wave Basin

The laboratory's large-scale wave basin, which is 35m x 26m x 1.5m, has a serpent-type wave generator and a longshore current generator. It is possible to generate waves with a height in excess of 40cm and longshore currents in excess of 20m³/min in the basin. The serpent-type wave generator, which is composed of 48 segmented wave boards, can generate oblique waves and directional random waves by controlling the motion of each wave board. Since these waves are similar to actual ones, engineers can carry out hydraulic model tests with a high degree of accuracy.

Large-Scale Wave Basin	Control Room

Directional Random Wave Generator

Wave generator---Serpent-type
Water depth---0.3m - 1.2m
Wave paddle---0.5m x 48units
Performance---Hmax=40cm,T=0.5sec - 4sec
Wave type---Monochromatic wave/ Uni-directional random wave
Oblique wave/ Multi-directional random wave

Wave Flume

Wave Flume

The flume, which is 50m x 0.8m x 1.5m, has an irregular wave generator and a circulatory current generator. It is possible to generate waves with a height in excess of 30cm and circulatory currents in excess of 12 m3/min. Wave generator---Piston type Water depth---0.3m - 1.2m Performance--- Hmax=30cm,T=0.5sec - 3sec Wave type---Regular wave / Irregular wave Circulatory Current---12m3/min

Uses

• Wave and tidal current forces on maritime structures
  
• Motion of floating maritime structures
  
• Wave height distribution around maritime structures / Harbor tranquility
  
• Local scour around coastal structures due to wave and tidal current motion
  
• Beach topographical change in the surf zone
  
• Warm water diffusion / Turbid water diffusion
  
• Mixing and diffusion of stratified flows

Hazama Technical Research Institute
515-1, KARIMA, TSUKUBA-SHI IBARAKI, JAPAN
TEL: 029-858-8803 / FAX: 029-858-8809