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    Ballast cleaning removes this worn ballast, screens it and replaces the "dirty" worn ballast with fresh ballast. The advantage of ballast cleaning is that it can be done by an on-track machine without removing the rail and sleepers, and it is therefore cheaper than a total excavation.

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    When we think of the introduction of marine species, ballast water, hull fouling and commercial ships are the first things that come to mind. But that's only half the story. As Dr. Chela Zabin and her colleagues point out in their recent publication in Management of Biological Invasions, small boats may play a large role in the spread of ...

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    Using ballast bed cleaning machines, the ballast can be cleaned without dismantling the track. The central features are powerful scraper chains that excavate the fouled ballast and at the same time prepare the foundation for the new ballast. The ballast is cleaned in large oscillating screens with several screening levels which ensures optimum ...

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    Recreational Boats as Potential Vectors of Marine Organisms at an Invasion Hotspot Ian C. Davidson ... painting and cleaning varied substantially, but we did not find strong patterns of biofouling extent ... ballast water, ship bio­ Most marine NIS worldwide have been introduced . fouling, mariculture transfers, ornamental release, bio ...

    • Published in: Aquatic Biology · 2010Authors: Ian C Davidson · Chela J Zabin · Andrew L Chang · Christopher W Brown · Mark D Sy.Affiliation: Portland State UniversityAbout: Recreation · Biofouling · Invasive species · Introduced species
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    Regarding kayaks: A flat-bottomed hull, combined with some weight up front (a passenger, or some inanimate ballast like a sandbag or water bag) can provide a lot of stability. If later you find you want the floats, it's easy enough to add them -- the float arms just slide right into the front crossbar and lock in place with spring buttons.

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