Dredging: how the hell does that work?

Ben Mendelsohn sez, "Dredging - the mechanized transport of underwater sediments - is one of the most elemental of the infrastructural support systems that underlie modern societies. Through dredging, we act as geologic agents - moving earth in what amounts to a new geologic cycle. This video introduces dredging, its landscapes, and some of the fascinating technologies that we use to manage it. It was produced in support of DredgeFest NYC, a symposium on the human acceleration of sediments, to be held in New York City on September 28-29." (Thanks, Ben!)


    1. The long answer: For removing built up sediments from erosion it can serve as a temporary solution, but unless the source of these sediments is eliminated or mitigated, future dredging is inevitable.

      1. It’s worse than inevitable. Most of the current dredge techniques used today end up accelerating the erosive forces that led to the build up in the first place. Dredging begets more dredging more often.

  1. Dredging is also amongst the most destructive ways to fish.

    I don’t eat scallops, for this reason.  Delicious scallops…

      1. I have a friend who dives for a living.  He tells me that you can always tell where a sea bottom has been dragged/dredged for scallops: 100 ft-wide swaths of nothing.  No rocks, no vegetation, no fish – just barren floor.

  2. OK, the video posted that purports to introduce “dredging, its landscapes, and some of the fascinating technologies that we use to manage it” is one minute 26 seconds long, and pretty much content-free. Also, the Dredgefest NYC URL is a 404.

  3. I was at the 2011 DREDGEFEST . I think.

    I thought I saw Jane’s Additiction playing on stage at one point, but after a few bottles of JD and a couple hundred thousand tons of silty-clay, it’s hard to remember much.

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