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The Rhine Valley (German: ) is a glacial alpine valley, formed by the part of the Alpine Rhine (German: ) between the confluence of the Anterior Rhine and Posterior Rhine at Reichenau and the Alpine Rhine's mouth at Lake Constance. From Reichenau, the Alpine Rhine flows east, passing Chur and turning north, forms the border between the Canton of St. Gallen of Switzerland on the left, west side and first Liechtenstein and then Vorarlberg, Austria on the right, east side. The Swiss-Austrian border follows the historical bed of the Rhine, but today the river follows an artificial canal within Austria for the final . The Rhine Valley in this area extends to about . Its upper third has the character of an Alpine valley, enclosing a bottom plain of about across. Downstream of Vaduz, the valley widens considerably, developing into a broad plain, measuring some across at its lower end along the southern shores of Lake Constance. From the point of the Rhine's emergence from Lake Constance, it is known as High Rhine. Tributaries of the Alpine Rhine are the Plessur, Landquart, Ill and Frutz rivers on the right side. It has no major left tributaries; streams joining it from the left are the Oldisbach at Chur, Cosenz at Untervaz, Säge at Tardisbrücke, Tamina at Bad Ragaz, Tobelbach at Burchs, Simml at Gams. ==Geography== 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「Alpine Rhine」の詳細全文を読む スポンサード リンク
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