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Hydroacoustics Technology is Helping to Locate and Map Aquatic Plant Beds


Hydroacoustics technology used to navigate boats, track fish and hunt for sunken treasure is now making waves in weed control – shedding new light on the size and shape of plant beds lurking beneath the water.

To map the location of weeds, boats guided by global positioning systems and equipped with sonic depth-finders travel across a lake, bay or other body of water in a carefully calibrated pattern. Data from the soundings is recorded onto a memory card and analyzed by sophisticated software to indicate the presence of plant masses growing beneath the surface – including their depth, underwater height and density.

Growing numbers of public and private organizations concerned about invasive weeds have incorporated hydroacoustic systems. They are using the technology to map changes in both invasive and native plants under a variety of scenarios – from no management to intense management.

 
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Asian Carp Creeping Toward Lake Michigan - A bill currently before Congress could lead to the installation of seismic water guns below the lock to make it harder for the carp and other species to swim upstream. Other tools that utilize sound could also be used to deter the fish, and it's possible to flush clean water into the lock as barges pass as well.


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