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Lowering an acoustic Doppler current profiler from a cable way.

By Communications and Publishing 2017 (approx.)
Two technicians in a cablecar over a river, with an instrument hanging below them
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Detailed Description

USGS technicians preparing for a streamflow measurement by lowering an acoustic Doppler current profiler from a cable way on the American River near Fair Oaks, California. 

Sources/Usage

Public Domain.