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Measurement of Tidal Flows in the Sacramento-San Joaquin Delta, California
Richard N. Oltmann and Michael R. Simpson, USGS

Acoustic Doppler Discharge Measuring System (ADDMS)

ADDMS

An ADCP-based portable flow measuring system is used to make fast and accurate flow measurements of a channel for use in calibrating a UVM. Velocity and depth are measured and the flow is computed as the ADCP traverses the channel. Flow measurements of 600-foot wide channels can be made in 2 to 3 minutes with an accuracy of 2% (Simpson and Oltmann, 1993) using only a two-man crew.

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Page Last Modified: Thursday, 13-Dec-2007 12:22:50 PST