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The Arda is a torrent of Emilia-Romagna, Italy, nearly all of its course being within the province of Piacenza. It is a right tributary of the Po River. It rises at an elevation of in the Ligurian Apennines on the north-west slopes of Monte Lama (near Monte Menegosa), within the commune of Morfasso. After about , at an elevation of , it is dammed to form the Lago di Mignano reservoir which covers about and provides both a water supply and hydro-electric power. The stream then flows through Lugagnano Val d'Arda and Castell'Arquato before entering the plain where it passes through Fiorenzuola d'Arda and Cortemaggiore. Before entering the Po, near Polesine Parmense, it is joined on the right by another torrent, the Ongina, whose source is in the Piacenza hills, between Alseno and Castell'Arquato. The Arda follows the typical pattern of an Apennine torrent with maximum discharges during the spring and autumn rains and a minimal flow during the summer. ==Notes== As of 8 August 2006 the article was based on the corresponding page of the Italian Wikipedia 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「Arda (Italy)」の詳細全文を読む スポンサード リンク
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