Multibeam imaging of the environment around marine renewable energy devices

Benjamin Williamson, Philippe Blondel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

118 Downloads (Pure)

Abstract

The drive towards sustainable energy has seen rapid development of marine renewable energy devices, and current efforts are focusing on wave and tidal structures. However, little is known of the effect of installing and operating these devices. The NERC/DEFRA collaboration FLOWBEC-4D (Flow, Water column & Benthic Ecology 4D) is investigating these effects at test sites in Orkney (EMEC) and Cornwall (Wave Hub), combining the data from bird observations, shore-based marine X-band radar surveys of wave and current data, detailed modelling of the flow and water column, passive acoustic monitoring and the deployment of a remote-sensing sonar platform. The latter contains a multibeam imager, whose design and operation will be presented in this talk. The first field deployments are planned for May-July 2012 with first underwater tests earlier in
spring. Self-contained and intended to be deployed for 2 weeks at a time with short turnaround times between deployments, this platform is based on the Imagenex Delta T multibeam sonar (260 kHz) with associated power supplies, instrumentation and data recording devices. The sonar faces vertically upwards with the multibeam swath orientated parallel to the tidal flow. Versatile duty cycling allows acoustic snapshots at specific intervals of interest. Range and volume backscatter intensity measurements are used to reconstruct the evolution of the environment around the sonar. This allows imaging of targets (e.g. fish and diving seabirds) interacting with the marine renewable energy device of interest and moving in the tidal flow.
Original languageEnglish
Title of host publication11th European Conference on Underwater Acoustics 2012, ECUA 2012
Place of PublicationSt. Albans
PublisherInstitute of Acoustics
Pages1271-1277
Number of pages7
Volume34 2
ISBN (Print)9781622761920
Publication statusPublished - 2012
Event11th European Conference on Underwater Acoustics - Edinburgh, UK United Kingdom
Duration: 1 Jul 20126 Jul 2012

Conference

Conference11th European Conference on Underwater Acoustics
CountryUK United Kingdom
CityEdinburgh
Period1/07/126/07/12

Fingerprint

sonar
energy
acoustics
water column
multibeam sonar
diving
seabird
backscatter
instrumentation
radar
ecology
bird
remote sensing
monitoring
fish
modeling
effect
test

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Williamson, B., & Blondel, P. (2012). Multibeam imaging of the environment around marine renewable energy devices. In 11th European Conference on Underwater Acoustics 2012, ECUA 2012 (Vol. 34 2, pp. 1271-1277). St. Albans: Institute of Acoustics.

Multibeam imaging of the environment around marine renewable energy devices. / Williamson, Benjamin; Blondel, Philippe.

11th European Conference on Underwater Acoustics 2012, ECUA 2012. Vol. 34 2 St. Albans : Institute of Acoustics, 2012. p. 1271-1277.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Williamson, B & Blondel, P 2012, Multibeam imaging of the environment around marine renewable energy devices. in 11th European Conference on Underwater Acoustics 2012, ECUA 2012. vol. 34 2, Institute of Acoustics, St. Albans, pp. 1271-1277, 11th European Conference on Underwater Acoustics, Edinburgh, UK United Kingdom, 1/07/12.
Williamson B, Blondel P. Multibeam imaging of the environment around marine renewable energy devices. In 11th European Conference on Underwater Acoustics 2012, ECUA 2012. Vol. 34 2. St. Albans: Institute of Acoustics. 2012. p. 1271-1277
Williamson, Benjamin ; Blondel, Philippe. / Multibeam imaging of the environment around marine renewable energy devices. 11th European Conference on Underwater Acoustics 2012, ECUA 2012. Vol. 34 2 St. Albans : Institute of Acoustics, 2012. pp. 1271-1277
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