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Criteria for the Depths of Dredged Navigational Channels (1983) / Chapter Skim
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Executive Summary
Pages 1-6

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From page 1...
... Nevertheless, the references cited for assistance in determining squat and other characteristics of the design ship (aside from consultation with ship owners and local pilots) are at least 20 years old, some more than 30.
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From page 2...
... The panel used them in a simple computer analysis of nine major dredged channels* of the three coasts of the United States.
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From page 3...
... "Nautical Depth" Concept The results of research in the Netherlands preceding and following construction of the very deep draft channels and harbors of Europoort/Rotterd~m could be applied to silty channels in the United States. Ascertaining the channel bottom is difficult when fine suspended sediments are in motion or settling.
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From page 4...
... , plus additional depths to allow for sounding accuracy, for sedimentation between two dredging intervals, and for dredging inaccuracies. This last figure varies from country to country: those making an allowance for dredging inaccuracies specify amounts close to the allowances used in the United States, but some countries allow none.
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From page 5...
... -- these recommendations reflect the results of recent research and represent international consensus; o Specific design criteria for particular channels be based on the results of comprehensive and detailed site studies; o o Frequent surveys be made in known, high-shoaling areas; The nautical depth concept be adopted for silty channels of the United States; and o Better information about operational practices and the hydrodynamic behavior of ships be collected and incorporated in channel design.
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Key Terms

  • underkeel clearances
  • underkeel clearance
  • depth concept
  • frequent surveys
  • confined channels

  • mechanisms deliver
  • dredged depths
  • channel depths
  • silty channels
  • navigational projects

  • dredging intervals
  • interior mechanisms
  • dredging inaccuracies
  • navigational channels
  • deliver sediment

  • specified dimensions
  • channel design
  • examples studied
  • galveston channel
  • recommendations reflect

  • represent international
  • channel depth
  • navigation data
  • computer simulations
  • improvement depends

  • panel indicate
  • ship behavior
  • following construction
  • design snips
  • experience indicates


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