ADCP Acoustic Doppler Current Profiler Morven Muilwijk 2014 University of Bergen, Bjerknes Centre...

ADCP Acoustic Doppler Current Profiler

Morven Muilwijk2014

University of Bergen, Bjerknes Centre for Climate Research

What is an ADCP?

• Acoustic Doppler Current Profiler

Morven Muilwijk 2014

The Doppler Shift


The Doppler Shift


Speed of sound = frequency × wavelength

The Doppler Shift


Current profiling and 3D velocity measurements

4 Measurements at once:

1. Speed and direction

2. Bottom tracking

3. Height or range

4. Distribution of material (intensity)


Different types, different purposes


Applications of the ADCP

• Oceanography• Vessel Traffic Safety in the Port & Harbor• Tidal currents observations • Efficient Seismic Survey Operations


Applications of the ADCP


•Oil industry•ADCPs for renewable energy projects

New York power plant


Different types of platforms


Examples of studies

• Measuring tidal currents in a sound


Advantages

• Easy to use and to make profiles • No moving parts• Small scales • Absolute speed of water• Measures columns up to 1000m


Disadvantages

• Barnacles and algea • Clear waters • Compromise between distance or precision • Bubbles in turbulent water• Battery power with

frequent pings


Good to know when working with ADCP’s

• Backscatter • Ping • Main Lobe• Blank zone• Ambiguity


ADCP Acoustic Doppler Current Profiler

Morven Muilwijk2014

University of Bergen, Bjerknes Centre for Climate Research

ADCP Acoustic Doppler Current Profiler Morven Muilwijk 2014 University of Bergen, Bjerknes Centre...

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