Using acoustics to observe suspended sediment concentration

Measuring suspended sediment concentration is important for a wide range of applications and disciplines, from operational dredge monitoring or civil engineering activities, to understanding natural environments, as well as fundamental research into sediment transport processes. There are many methods of measuring suspended sediment, each with their strengths and weaknesses. Acoustic instruments have clear advantages over alternatives: a non-invasive approach, minimal impact of biofouling on sensors, profiles rather than single point measurements, and the fact that in situ samples are not always needed. This article explores the acoustic approach in more detail, looking at the science behind the concept as well as the features of the commercially available AQUAscat instrument.

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