Hydrologic Instrumentation Facility
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The submerged jet tank has a 12 x 12 ft cross section and is 120 ft long. The submerged jet facility is a low-turbulence, live-velocity source; that is, the water moves past the stationary meter. The discharge into the tank flows from the laboratory's constant head tank to the head box of the jet, through the jet, over a weir, and back to the sump from which pumps convey the water back to the constant head tank. The system allows for a discharge stable to less than 0.5 percent. Discharge measurements are made using calibrated volumetric tanks. Velocities at the jet face have a stable range of 0.25 to 8 ft/s.
This facility is used primarily for the calibration of electromagnetic current meters because of its extreme low level of electrical noise.
For additional information contact Kirk Thibodeaux (228-688-1508).
Return to Indoor Hydraulic Laboratory
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://wwwhif.er.usgs.gov/public/laboratory/subjet.htm
Page Contact Information: HIF Web Support Team
Page Last Modified:
06 Feb 2008
