| 翻訳と辞書 |
Dyke Marsh
Dyke Marsh is located on the west bank of the Potomac River south of Alexandria, Virginia between Old Town Alexandria and Mount Vernon. Dyke Marsh consists of about of tidal marsh, floodplain, and swamp forest. Forming 5,000 to 7,000 years ago, Dyke Marsh is one of the largest remaining pieces of freshwater tidal wetlands left in the Baltimore-Washington Metropolitan Area. The marsh is managed by the National Park Service. Dyke Marsh contains a wide array of plant and animal life. "Haul Road" is a trail that leads visitors into the marsh. It is frequented by area birdwatchers. Dyke Marsh is located off the George Washington Memorial Parkway at the Belle Haven Marina exit.
Here the fresh water of the upper Potomac mixes with the salt water of the lower Potomac. The fresh water tends to float above the tidal salt water producing a tidal freshwater marsh.
==Name==
Dyke Marsh got its name because it was within a dike at one point. Earthen walls were built around the perimeter of the marsh in the 19th century to create more "fast land," land not inundated by tides. This land was used for farming purposes, mainly to graze livestock or to grow crops.
One of the oldest photographs of Dyke Marsh is a ''circa'' 1909 picture postcard created for the Alexandria-Mt. Vernon trolley line (whose light rail tracks were replaced by the George Washington Memorial Parkway in 1932.) The ''ca.'' 1909 photograph is labelled: The "Dyke," a favorite resort for fishermen and hunters on the line of the Mt. Vernon Railroad, near Alexandria, Va.〔Owens, Trevor (2010). (''Fairfax County'' ). Postcard History Series. Chicago: Arcadia Publishing. p.111. ISBN 978-0-7385-6631-3〕
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「Dyke Marsh」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|