A mod5ed version of Bagnold's velocity meter, suitable for determining the mean velocity at a point in a salt water laboratory density current, is described. The . dynamic head detected by a small bore Pitot nozzle is balanced by the dynamic head of an opposing jet of fresh water. The position of the interface between the salt water in the nozzle and the opposing fresh water flow is detected by a simple conductivity meter. The meter is calibrated by immersing it in a salt water flow of known velocity and by a…
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