Author(s): Massimo GUERRERO

Linked Author(s): Massimo Guerrero

Keywords: hydro-acoustics; Doppler effect; backscatter; sediment transport; waves impact

Abstract:

Underwater sound techniques began since Leonardo Da Vinci which listened to approaching ships by using a tube in water and placing its outer extremity to hear. The sound speed into water was firstly measured on Lake Geneva in 1826 whereas the modern acoustics is due to Lord Rayleigh which lived in the late 19th and early 20th century. In spite of these well consolidated bases, the using of acoustic techniques in hydraulics is pretty recent and developed in parallel for laboratory and field applications. Ultrasound techniques are particularly relevant in case of opaque fluids and for no optical access through boundaries. This talk delineates important features of hydro-acoustics and the instruments used. Some experiences show the acoustic investigation of sediment transport, which has always been a challenging task in riverine environment, and sea waves tests carried out at the hydraulic laboratory of the University of Bologna.

DOI: https://doi.org/10.25171/InstGeoph_PAS_Publs-2021-004

Year: 2021