Problems and Opportunities in the Design of Entrances to Ports and Harbors Proceedings of a Symposium (1981) / Chapter Skim
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Harbor/Port Entrance Design
Harbor/Port Entrance Design
Pages 13-26
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From page 13... ...
For example, in the days of sailing vessels, a harbor entrance could not be lined up with a strongly prevalent wind direction, else ships could seldom enter or leave it. Today, the channel dimensions must be large enough to pass the largest "hip expected to call at the port, despite the possibility that these dimensions may require a wide opening between breakwaters, admitting more wave energy than desirable or needed for smaller vessels, and despite the sedimentation that may occur at an accelerated rate in the deeper channels needed for the larger ships.
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From page 14... ...
Placement of buoys between those marking changes in direction reduces pilot error
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From page 15... ...
Steering is easier if the desired path is a straight line and if two or more range markers on shore can be lined up visually along this path. Many recent tracking tests have shown that pilot error in following a channel is reduced considerably if intermediate buoys are placed between those that mark changes in direction, as in Figure 2.
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From page 16... ...
Wind set-up, causing surface water to flow in the wind's direction, is frequently the dominant factor causing water movement in both the vertical and horizontal direction. The variety of design considerations and the consequences of particular design decisions can be seen in existing and proposed examples of ports and harbors.
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From page 17... ...
Test harbor for evaluation of tanker maneuvering. Figure 5.
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From page 18... ...
Simple entrance to pleasure marina.
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From page 19... ...
Sea berths protected by rocky islands. '1 _ ~ _ ~_ Figure 11.
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From page 20... ...
The long, straight breakwater at Escombreros, Spain, with berths on the inside, demands a curving approach by loaded tankers, and tug assistance to move the vessel laterally. Figure 17 shows the Port of Los Angeles, California, behind the big San Pedro breakwater, and its several channels.
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From page 21... ...
Proposed oil terminal for port of Los Angeles. s~uT J~ ~ <,>~bL^MO \ as, or Taco ~: J \ - Tams Call_-, ~ -AT ~.t music INKED / Figure 19.
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From page 22... ...
Entrance to port of Charleston, South Carolina.
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From page 23... ...
1~ ~ >14~ :~.: 1\ ( t^~~ \ tt~,:_._~ \ LOCATOR OF MELVILLE ~e ~"o ~6 Figure 27. Long entrance to Melville Island, Quebec.
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From page 24... ...
_ I_ I'd: :: ' ~ - ~' fit - L LA - U' :Pigure 31. Harbor designed to reduce wave penetration for barge anchorage.
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From page 25... ...
Outer and inner breakwaters provide quiet water for barges. In Puget Sound, on the other hand, the principal concerns in the design of a marina at Point Roberts (Figure 32)
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