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harbor : ウィキペディア英語版
harbor

A harbor or harbour (see spelling differences), or haven, is a body of water where ships, boats, and barges can seek shelter from stormy weather, or else are stored for future use.
Harbors can be natural or artificial. An artificial harbor has deliberately constructed breakwaters, sea walls, or jettys, or otherwise, they could have been constructed by dredging, and these require maintenance by further periodic dredging. An example of the artificial harbor is Long Beach Harbor, California, which was an array of salt marshes and tidal flats too shallow for modern merchant ships before it was first dredged in the early 20th century.〔http://geology.campus.ad.csulb.edu/people/bperry/geology303/geol303chapter8.html〕
In contrast, a natural harbor is surrounded on several sides by prominences of land. Examples of natural harbors include Sydney Harbour, Australia and San Francisco Bay, California.
Harbors and ports are often confused with each other. A port is a facility for loading and unloading vessels; ports are usually located ''in'' harbors.
==Artificial harbors==

Artificial harbors are frequently built for use as ports. The oldest artificial harbor known is the Ancient Egyptian site at Wadi al-Jarf, on the Red Sea coast, which is at least 4500 years old (ca. 2600-2550 BC, reign of King Khufu). The largest artificially created harbor is Jebel Ali in Dubai. Other large and busy artificial harbors are located at: Rotterdam, The Netherlands; Port of Houston, Texas; Port of Long Beach, California; and Port of Los Angeles in San Pedro, California.
The Ancient Carthaginians constructed fortified, artificial harbors called cothons.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「harbor」の詳細全文を読む



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