Nile river boat

Discussion in 'Boat Design' started by gerretw, Jan 26, 2021.

  1. philSweet
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    philSweet Senior Member

    Recycling doesn't always make sense. It is easier to fashion a new piece of wood than to carry one 600 miles. On many rivers, most of the hull didn't return. Some choice, high-value items might make the trip back upstream, but the rest was quite valuable as a raw material in the denuded desert. And remember, they still had to transport the darn thing across the desert once they got it down the river. So there was probably a large portion of multi-modal components.
     
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  2. clmanges
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    clmanges Senior Member

    I can't help wondering what the riverbed topology was a couple thousand years ago. I notice on the map that the first cataract is at Aswan, and I'm pretty sure they didn't have a dam there back then.
     
  3. philSweet
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    philSweet Senior Member

  4. jehardiman
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    jehardiman Senior Member

    So 3.5Ky BP is ~1500 BCE.
     
  5. Will Gilmore
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    Will Gilmore Senior Member

    Ancient Egyptian used a device called a shaduf, for irrigation.
    upload_2021-2-14_16-21-37.png
    It is the foundation design, of Archimedes' crane
    upload_2021-2-14_16-24-18.png
    I suspect, that with all the counterbalance resources a dessert can provide, getting the blocks on and off a barge wasn't that difficult.

    Also, gin poles have been around for a long long time.
     
  6. Squidly-Diddly
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    Squidly-Diddly Senior Member

    that, plus lots of rivers will have slow upriver currents along the banks. Lewis & Clark used that often. You can see it several spots on Stanislaus River run from Knight's Ferry. You can see scum and leaves on top of the water moving upstream where the river gets wide.
     
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  7. Will Gilmore
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    Will Gilmore Senior Member

    rivers are shallow and move very slowly or even upstream, on the inside of bends, and fast and deep on the outside curves.
    upload_2021-2-15_8-38-37.png
    Note the beach on the inside curve, where sediment can settle, and the outside bank gets undercut.

    Unladen shoal draft barges to the inside, going upstream, deeper, loaded vessels on the outside, going down stream.
     
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