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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Steamboats of the Columbia River ： ウィキペディア英語版 Steamboats of the Columbia River :''This article concerns steamboats operating between Tri-Cities, Washington and the Pacific Ocean. For boats on the river's upper reaches, see Steamboats of Columbia River, Wenatchee Reach, Steamboats of the upper Columbia and Kootenay Rivers, and Steamboats of the Arrow Lakes.'' Many steamboats operated on the Columbia River and its tributaries, in the Pacific Northwest region of North America, from about 1850 to 1981. Major tributaries of the Columbia that formed steamboat routes included the Willamette and Snake rivers. Navigation was impractical between the Snake River and the U.S./Canadian border, due to several rapids, but steamboats also operated along the Wenatchee Reach of the Columbia, in northern Washington, and on the Arrow Lakes of southern British Columbia. ==Types of craft== The paddle-wheel steamboat has been described as an economic "invasion craft" which allowed the rapid exploitation of the Oregon Country, a huge area of the North American continent eventually divided between the United States and Canada, and of Alaska and the Yukon.〔Affleck, Edward L., ''A Century of Paddlewheelers in the Pacific Northwest, the Yukon, and Alaska'', Alexander Nicholls Press, Vancouver, B.C. 2000 ISBN 0-920034-08-X〕 Three basic types of steamboat were used on inland waterways: propeller, side-wheeler, and sternwheeler. Propellers required deeper draft than was commonly available on inland rivers, and side-wheelers required expensive docking facilities. Stern-wheelers were more maneuverable than side-wheelers and could make a landing just about anywhere. For these reasons, the stern-wheeler type was dominant over the propeller and the side-wheeler in almost all inland water routes.〔〔Timmen, Fritz, ''Blow for the Landing'', Caxton Printers, Caldwell, ID 1972 ISBN 0-87004-221-1〕 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「Steamboats of the Columbia River」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.