Facilities

lhe_infrastructure

The Environmental Hydraulics Laboratory possesses a multifunctional large scale wave flume. Located in the Québec Metro High Tech Park, the flume is 120 m long and has a depth and a width of 5 m. It is the largest of its kind in North America.

The flume is designed for modeling the interactions of waves, tides, currents, and sediment transport. This equipment enables researchers to develop sustainable approaches to coastal management for controlling erosion caused by climate change. The flume has numerous other potential applications.

The wavemaker is a piston-type mechanism with a maximum stroke length of 4 m. The flume can be set up with a variety of initial conditions, including regular and irregular waves, and offers a host of user-defined functions. For example, to simulate landslide- or earthquake-generated tsunamis, large amplitude waves reaching the top of the flume walls can be produced with water depths ranging from 2.5–3.5 m with wave periods of 3–10 s.

 

The flume is equipped with a mobile walkway, a gantry crane, a series of multipurpose supports, as well as :

  • A wavemaker
  • A water transfer system connected to a 3500 m³ tank
  • A bidirectional water circulation system
  • Measuring instruments (flow rate, turbidity, water level, topography, etc.)
  • Numerical model developments of wave physics and coastal interactions are conducted on high-performance computers via Compute Canada

 Instrumentation

lhe_equipementLocal acquisition systems: 14 National Instrument CompactRIO systems with 256 analog inputs each (32 channels per module x 8 modules sampled at 250 kHz in total per module) located every 5 m along the flume from 45 to 105 m from the wavemaker.

Current meters:

  • 2 Mini-ADP 3 MHz from Sontek
  • 2 Aquadopp HR 2 MHz from Nortek
  • 10 ADV Vectrino from Nortek
  • 3 ADV Vectrino II from Nortek

Turbidity sensors: 24 OBS 3+

Water level sensors: 18 WG-55 from RBR-Global

 

Topography-bathymetry:

  • 1 Multibeam Profiling Sonar 675 kHz  from Imagenex (model Delta T 837B)
  • 1 Digital Multibeam Imaging Sonar 260 kHz from Imagenex (model 965)

Cameras:

  •  1 Deep Sea Multi Sea Cam (underwater)
  •  2 Deep Sea Seasnake SS-30C (underwater)
  •  1 Deep Sea Multi Sea Lite (underwater)
  •  2 mobile HD security cameras
  •  1 wireless security camera
  •  1 fixed HD security camera

70 strain gages
Barometric pressure sensor: 1 RM Young
Pressure sensors: 25 UNIK5000 by GE

 

Other related equipment

ctscan-2The CT Scanning for Civil Engineering and Natural Resources Laboratory possesses a smaller scale wave flume. This equipment can be used to carry out experiments at a small scale before they are reproduced at larger scale in the main flume. The small flume enables the study of internal structures of marine sedimentary objects, the study of sedimentary dynamics in coastal and estuarine environments (sedimentological, geophysical, and physical measurements, use of radioactive tracer), and helps reveal transport processes.

 

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