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Ahr is a river in Germany, a left tributary of the Rhine. Its source is at an elevation of approximately above sea level in Blankenheim in the Eifel, in the cellar of a timber-frame house near the castle of Blankenheim. After it crosses from North Rhine-Westphalia into Rhineland-Palatinate. The Ahr flows through Ahr valley or ''Ahrtal'', passing through the towns of Schuld, Altenahr and Bad Neuenahr-Ahrweiler. Between Remagen and Sinzig (south of Bonn), at about above sea level, it flows into the Rhine. The length is roughly , of which is within Rhineland-Palatinate. The Ahr has a gradient of 0.4 percent in its lower course, and 0.4 to 0.8 percent in its upper course. The Ahr and its tributaries are a main drainage system of the eastern Eifel. The watershed is approximately . There were isolated settlements in the Ahr valley beginning at the latest in Roman times, evidenced by the Roman villa near Ahrweiler. Owing to their isolated location, the upper and middle parts of the course were sparsely populated. That changed from the mid-19th century. The development of the settlements, the traffic routes and the agricultural areas in the Ahr valley led to the fact that the riverbed was fixed. The Ahr valley makes up the Ahr wine region, which is small but noted for its red wines made from the Pinot noir variety. == Tributaries == The major Ahr tributaries are (from its mouth upstream): the Harbach, Hellenbach, Bachemer Bach, Leimersdorfer Bach, Liersbach, Vischelbach, Sahrbach, Kesselinger Bach, Armuthsbach, Dreisbach, Eichenbach, Adenauer Bach, Trierbach, Ahbach, Schaafbach and Nonnenbach. The tributaries of the Ahr include (in upstream order): Tributaries with a length of over 7 km (from source to mouth): Left tributaries are in dark blue; right tributaries in light blue. TimeAxis = orientation:horizontal format:xxxx ImageSize = width:750 height:auto barincrement:25 PlotArea = left:10 right:10 top:10 bottom:40 AlignBars = justify Colors = id:canvas value:rgb(0.97,0.97,0.97) BackgroundColors = canvas:canvas Period = from:0 till:30 ScaleMajor = unit:year increment:5 start:0 gridcolor:blue BarData= barset:Flusslänge Define $left = textcolor:white color:oceanblue Define $right = textcolor:black color:skyblue PlotData= width:18 fontsize:M textcolor:black color:skyblue shift:(20,-6) anchor:from barset:Flusslänge from:start till:11.4 $right text:Schaafbach (11.4 km) from:start till:9.5 $right text:Lampertsbach (9.5 km) from:start till:7.1 $left text:Mühlenbach (7.1 km) from:start till:8.3 $right text:Michelsbach (8.3 km) from:start till:14.9 $right text:Ahbach (14.9 km) from:start till:25.3 $right text:Trierbach (25.3 km) from:start till:10.0 $left text:Dreisbach (10.0 km) from:start till:18.4 $right text:Armuthsbach (18.4 km) from:start till:15.7 $right text:Adenauerbach (15.7 km) from:start till:14.5 $left text:Liersbach (14.5 km) from:start till:14.1 $right text:Kesselinger Bach (14.1 km) from:start till:15.3 $left text:Sahrbach (15.3 km) from:start till:10.5 $left text:Vischelbach (10.5 km) from:start till:8.3 $left text:Leimersdorfer Bach (8.3 km) from:start till:7.7 $right text:Hellenbach (7.7 km) from:start till:9.9 $right text:Harbach (9.9 km) TextData= fontsize:M pos:(10,20) text:km 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「ahr」の詳細全文を読む スポンサード リンク
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