The data shown below was measured using a 32 element MTA. The operating frequency of the system was 5 MHz and the transducer spacing was 2 cm.

The test section was 50 meters in length and the width of the flume was 4 meters. The median sediment diameter was 0.19 mm, the wave height was 1 meter, and the wave period was 6.5 seconds.

The array was mounted on a moving carriage which travelled at a rate of 11 cm/sec.

whole flume web

The above plot shows the seabed location along the whole length of the test section.
The plots below are sections from the middle and end of the flume. The transition from movable bed to fixed bed can be seen to the right of the bottom plot.

middle flume web

end flume web