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Environmental Monitoring Technology Development

The Environmental Monitoring Technology Development (EMTD) task works toward making the processing of large datasets associated with underwater video cameras and other sensors used to study collision risk around turbines more efficient. Collision risk is currently a challenging environmental stressor to study and quantify, but empirical data is necessary for monitoring needs and to inform collision risk models of fish interactions used to fulfill permitting requirements for marine energy installations. Video cameras and acoustic cameras, also known as imaging sonars, are two technologies typically used to observe animal interactions with turbines at varying ranges. Video cameras require light and high enough visibility to provide meaningful imagery to document animal behavior and interactions. When low light or turbidity prevent the use of video cameras, acoustic cameras and multibeam echosounders are used. Manual processing of video and acoustic camera data is expensive and time consuming, so automated techniques are being developed.  

To address the need for cost-effective, streamlined data analyses, EMTD’s research aims to decrease uncertainty and cost related to fish interaction studies and provide a technology solution to address permitting requirements and clarify risk. The project’s initial effort is working toward developing an echosounder hardware and software solution for video or acoustic cameras to archive only data  containing fish/turbine interaction events, thereby reducing manual processing requirements.T he project will also test commercially available software and incorporate background subtraction algorithms into acoustic camera datasets to isolate turbine blade interference and improve data processing. Ultimately, these efforts will improve data collection, decrease time associated with data processing, and accelerate the ability to address permitting requirements addressing collision risk with marine energy devices.  

tritonenvironmentalmonitoringtechnologyimage
This figure shows outputs from an acoustic camera that uses multiple beams of sound reflected off animals and structures to provide a picture of dark or murky underwater scenes. This visual is from an acoustic camera looking into the water from the surface to approximately 11 m depth. The bright cloudy areas near the surface show air, and the smaller brighter spots are fish. The sequential slanted lines from 5m to 7.5m are the turbine rotating. The turbine interferes with some of the sound beams, making it difficult to process data efficiently. Triton is working to reduce this interference effect and make future data processing faster. Picture A shows the interference from the rotating turbine blades and picture B shows a decrease in this interference from current research methods. (Photo taken by a Sound Metrics Corporation's DIDSON acoustic camera.)
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Contact

Garrett Staines
Research Scientist
garrett.staines@pnnl.gov
(360) 681-3642

Research topics

Environmental Monitoring for Marine Energy
Marine Energy

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