Hypothetical Riverine Cross-Section with Single Frequency Sidelooking Acoustics Highlighted

Visualization of one acoustic method for measuring suspended sediment in a fluvial system: single frequency sidelooking acoustics. The acoustic Doppler velocity meter (ADVM), and the ADVM’s three beams are highlighted by a white, dashed box. 

The illustration depicts a river channel looking downstream with a cross-sectional view of the river showing different acoustic instruments and a boat in the channel. In the foreground, there is a rail on the right bank which is extending down into the water at a steep angle. In the middle of the rail, there is an acoustic Doppler velocity meters (ADVM), illustrating single frequency sidelooking acoustics. The ADVM has two beams spreading into the middle of the channel and a beam extending to the water surface. There is a white, dashed box that highlights the ADVM and beams. There is a cable that goes from the ADVM to a data collection platform on the right bank of the river. In the middle of the river and downstream of the ADVM, there is a boat on the river with two people in the boat. The boat is perpendicular to the river with the front of the boat facing the left bank. One person is operating a white suspended-sediment sampler from the side of the boat. The second person is driving the boat.