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The Aa is an long river in northern France. Its source is near the village Bourthes. It flows through the following ''départements'' and cities: * Pas-de-Calais: Saint-Omer. * Nord: Gravelines. The Aa flows into the North Sea near Gravelines, very close to the north-eastern limit of the English Channel. The name Aa is old-Dutch and means water, and can be traced back to its original Indo-European form as such. ==Geography== The river's geography can be divided into two styles. First, from its source, in the Artois Hills, to Saint-Omer, it is a small chalk stream, a small version of the Somme. Second, from Saint-Omer seawards, approximately ,〔 it is a navigable waterway with branch canals leading towards Calais and Dunkirk and the Canal de Neufossé heading inland into the French canal system. 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「Aa (river, France)」の詳細全文を読む スポンサード リンク
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