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Dredging Coastal Ports An Assessment of the Issues (1985) / Chapter Skim
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B: General Design Criteria for Dredged Navigational Facilities
Pages 144-148

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From page 144...
... are detailed, reflecting the economic significance of ports to the country, its challenging natural environment, and the need to balance economical design and construction and safety margins. The general design criteria used in the United States are developed by the U.S.
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From page 145...
... _ _ _ _ _ _ _ _ _ ~ N~ ~D£RK££L CL"~NCE NO MINAL CHANNEl BED LEVEt ~ ~_ SOUNDING ACCURA~ SEDI - NTAtI~ ~E~ DR£~61NGS TOL£~ANCE FOR DREDGING (a) Conventional Net Underkeel Clearance Calculation, Definitions from PIANC (Permanent International Association of Navigation Congresses)
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From page 146...
... SHIPOWNERS Statistical TERMPOL (CANADA) 1.15 x ship's draft, exceptions require special underkeel clearance survey Japan Depth of maneuvering basin (1.10 x ship's draft)
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From page 147...
... + Satety r.~argin .5 Passing Shin Clearance Between Lanes Total Width w/o Weather, Current Straight Channels Bends of 26o 4oo Weather and Current Clearance 3.2 beam 5.4 beam 6.1 beam + .9 beam Each side 4.0 beam 6.0 beam 1.0 beam Total both sides Total Width Straight Channels Bends, of 26° 4oo Paral le. 1 Bends Radius for Bends, of <25° 26°-3 5° >36° Width transition (total)
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From page 148...
... Fixed dolphins, berths Width = 1.5 x ship's beam parallel to channel PIANC None Japan Design Objective Offshore; · e waiting Mooring in storm Mooring Swinging Mooring with 2 anchors Seabed~Wind Good anchoring Bad anchoring Good anchoring Bad anchoring Wind vel.
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Key Terms

  • army corps
  • x water
  • underkeel clearance
  • current clearance
  • channel width

  • total width
  • anchoring bad
  • straight channel
  • bank clearance
  • navigational facilities

  • dredged navigational
  • net underkeel
  • port design
  • maneuvering lane
  • straight channels

  • clearance calculation
  • navigation congresses
  • channels bends
  • clearance total
  • ship clearance

  • permanent international
  • bad anchoring
  • published recommendations
  • lane straight
  • address forces

  • economic significance
  • time lag
  • clearance water
  • channel bends
  • additional width


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