The Role of ADCP Technology in Marine Energy Farms

The Role of ADCP Technology in Marine Energy Farms

Acoustic Doppler Current Profiler (ADCP) technology is carving a role in site location and operation management of marine renewable energy farms. With its diverse measurement capabilities the ADCP can aid in various phases of design and operation. The versatile sonar based device, similar to the hand-held radar used by police officers in speed traps, is a valuable tool that can provide multiple water measurements such as wave, current, and water level profiles.

The ADCP has the capability to make four different measurements simultaneously. Using sound to measure its environment the ADCP sends a sound burst and an echo is then returned from suspended particles carried by the currents in the water column and seabed. By analyzing these sound echoes the ADCP can make four different measurements simultaneously. Speed and direction of water currents are determined at multiple levels through the water column based on changes in frequency, this is known as a “current profile”. The ADCP’s speed-over-ground, and travel path, can also be determined by echoes scattered by the seabed. In addition the ADCP can measures water depth much like an echo sounder. Maps of the spatial distribution of sediments carried by the water column as in sediment plumes come from these echoes.

ADCP mounting capabilities include, buoy mounted options for current measurements or on offshore structures, as well as bottom installed systems mounted in the seabed that can collect numerous measurements in the water column under dynamic and demanding conditions. Because they can provide real time data ADCP technology is often used for modeling and assessment of circulation and water quality in ports and harbors, habitat restoration mitigation, and navigation channel modifications among others.