Multibeam Acoustic Detection of Fish and Water Column Targets at High-Flow Sites

Melvin, Gary D.; Cochrane, N. A.

doi:10.1007/s12237-014-9828-z

Cited by 35 publications

(27 citation statements)

References 27 publications

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“…However, not many studies of underwater turbulence and cavitation have been done using multibeam sonar (MBS) or dual-beam sonar (DBS) systems. Few studies showed that multi-, dual-and split-beam sonar systems can be used to observe and measure turbulence induced by cavitation of transiting ships, for example, Soloviev et al [5] used a 3D multibeam with an operating frequency of 375 kHz to study the wake of ships and measured the wake of ships using multifrequency-multibeam sonar systems, while Melvin and Cochrane [25] used a set of three sonar systems, one split-beam (120 kHz) and two multibeam sonar systems (200 kHz and 500 kHz) to detect turbulent flow. This work will complement previous work done by the above-mentioned authors (Soloviev et al [5], and Melvin and Cochrane [25]), and others.…”

Section: Introductionmentioning

confidence: 99%

Use of Multibeam and Dual-Beam Sonar Systems to Observe Cavitating Flow Produced by Ferryboats: In a Marine Renewable Energy Perspective

Francisco

Carpman

Temiz

et al. 2017

JMSE

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Abstract:With the prospect to deploy hydrokinetic energy converters in areas with heavy boat traffic, a study was conducted to observe and assess the depth range of cavitating flow produced by ferryboats in narrow channels. This study was conducted in the vicinity of Finnhamn Island in Stockholm Archipelago. The objectives of the survey were to assess whether the sonar systems were able to observe and measure the depth of what can be cavitating flow (in a form of convected cloud cavitation) produced by one specific type of ferryboats frequently operating in that route, as well as investigate if the cavitating flow within the wake would propagate deep enough to disturb the water column underneath the surface. A multibeam and a dual-beam sonar systems were used as measurement instruments. The hypothesis was that strong and deep wake can disturb the optimal operation of a hydrokinetic energy converter, therefore causing damages to its rotors and hydrofoils. The results showed that both sonar system could detect cavitating flows including its strength, part of the geometrical shape and propagation depth. Moreover, the boat with a propeller thruster produced cavitating flow with an intense core reaching 4 m of depth while lasting approximately 90 s. The ferry with waterjet thruster produced a less intense cavitating flow; the core reached depths of approximately 6 m, and lasted about 90 s. From this study, it was concluded that multibeam and dual-beam sonar systems with operating frequencies higher than 200 kHz were able to detect cavitating flows in real conditions, as long as they are properly deployed and the data properly analyzed.

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Section: Introductionmentioning

confidence: 99%

Use of Multibeam and Dual-Beam Sonar Systems to Observe Cavitating Flow Produced by Ferryboats: In a Marine Renewable Energy Perspective

Francisco

Carpman

Temiz

et al. 2017

JMSE

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“…Sound is an important guiding sense for marine animals such as dolphins, whales, seals, and fish [1][2][3][4]17]. Depending on the species, marine animals have a broad band of frequencies that cover frequencies from 0.01 to 200 kHz [1][2][3][4]17].…”

Section: Overview Of Sonar Technology In Use On Uu Monitoring Platformmentioning

confidence: 99%

“…Depending on the species, marine animals have a broad band of frequencies that cover frequencies from 0.01 to 200 kHz [1][2][3][4]17]. Therefore, anthropogenic noise with broadband frequencies from 0.01 kHz up to above 2 GHz may disturb the marine environment.…”

Section: Overview Of Sonar Technology In Use On Uu Monitoring Platformmentioning

confidence: 99%

Sonar for Environmental Monitoring: Construction of a Multifunctional Active Acoustic Platform Applied for Marine Renewables

Francisco¹,

Sundberg²

2016

Preprint

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Marine renewable energy is emerging as one of the fast-growing industry in the last decades, as modern society pushes for technologies that can convert energy contained from winds, waves, tides and stream flows. The implementation of renewable energy technologies impose high demands on both structural and environmental engineering, as the energy converters have to work under extreme conditions where parameters such as sea-bottom configuration, water transparency and depth, sea-states and prevailing winds are harsh. Constant monitoring of the marine environment is crucial in order to keep this sector reliable. Active acoustics is becoming a standard tool to collect multi-dimensional data from physical, geological and biological properties of the marine environment. The Div. of Electricity of Uppsala University have been developing an environmental monitoring platform based on sonar systems. This platform aims to monitor the installation, operation and decommissioning of marine renewable energy converters. The focus will be given the observations of behaviors of marine animals in vicinity of energy converters but also structural inspection and monitoring of MRETs. This paper describes how this multifunctional environmental monitoring platform come to existence from the design to the deployment phase.

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“…Viehman and Zydlewski () relied on manual processing of acoustic camera data employing a frame‐by‐frame analysis for fish identification, characterization, and behavioral interpretation. Similarly in the echosounder work of Melvin and Cochrane (), the identification of fish and isolation of turbulence effects were based on the authors' experience. In the mobile surveys of Jacques () and Jacques and Horne (), the standard school detection algorithm used in Echoview (Myriax Software, v.5.4.91) and based on the work of Barange () was employed to identify turbulent features as apparent “schools” that intersect a line three meters from the echosounder transducers mounted on the ship.…”

mentioning

confidence: 99%

“…Tidal channels are some of the most dynamic and challenging environments for hydroacoustic work, and have led to the rise of many recent innovative approaches in data collection and analysis using moving vessels (Jacques 2014;Melvin and Cochrane 2015), moored boats , and bottom-mounted platforms (Jacques 2014;Wiesebron 2015;Williamson et al 2015). Although ship based echosounder surveys are the general approach in fisheries research for most applications, the use of stationary platforms can have distinct advantages (Joslin et al 2014;Williamson et al 2015).…”

mentioning

confidence: 99%

Automatic active acoustic target detection in turbulent aquatic environments

Fraser

Nikora

Williamson

et al. 2017

Limnology & Ocean Methods

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There is no established approach for dealing with the active acoustic detection of biological targets in highly dynamic aquatic environments where intense physical interference means that standard techniques are unsuitable. This is a particular problem in ecologically important environments with emerging industrial significance such as marine energy extraction sites. We developed an automatic processing method which allows effective target detection with high sensitivity throughout variable acoustic conditions. The method is based on scale-dependent adaptive filtering of data and morphological analysis of short-scale backscatter contributions for the exclusion of intense turbulent features and isolation of biological targets. Echosounder platform deployments around marine energy infrastructure in a tidal channel provide test data which demonstrate the effectiveness of the proposed approach. Target validation and assessment is carried out by the analysis of multifrequency characteristics and direct inspection. The results deliver effective, quantitative, and repeatable assessment of ecological interactions and target distributions with clear implications for environmental assessment in high energy sites and promising applications in other contexts.

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Multibeam Acoustic Detection of Fish and Water Column Targets at High-Flow Sites

Cited by 35 publications

References 27 publications

Use of Multibeam and Dual-Beam Sonar Systems to Observe Cavitating Flow Produced by Ferryboats: In a Marine Renewable Energy Perspective

Use of Multibeam and Dual-Beam Sonar Systems to Observe Cavitating Flow Produced by Ferryboats: In a Marine Renewable Energy Perspective

Sonar for Environmental Monitoring: Construction of a Multifunctional Active Acoustic Platform Applied for Marine Renewables

Automatic active acoustic target detection in turbulent aquatic environments

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