Westphalia is a region in northwestern Germany and one of the three historic parts of the state of North Rhine-Westphalia. It has an area of 20,208 km2 (7,802 sq mi) and 7.9 million inhabitants.
The Sieg is a river in North Rhine-Westphalia and Rhineland-Palatinate, Germany. It is a right tributary of the Rhine.
The Niers is a river in Germany and The Netherlands, a right tributary of the river Maas (Meuse). Its wellspring is near Erkelenz, south of Mönchengladbach, in North Rhine-Westphalia (Germany).
The Heller is a 30 km long river in western Germany. It is a left tributary of the Sieg. The source is located near Haiger in Hesse. It flows through Burbach and Neunkirchen in North Rhine-Westphalia. It flows into the river Sieg in Betzdorf, Rhineland-Palatinate. Its basin area is 204 km².
The Düssel is a small right tributary of the river Rhine in North Rhine Westphalia, Germany. Its source is east of Wülfrath. It flows westward through the Neander Valley where the fossils of the first Neanderthal man were found in August 1856. At Düsseldorf it forms a river delta by splitting into four streams, which all join the Rhine after a few kilometres. The Nördliche Düssel flows through the Hofgarten and passes under the Golden Bridge.
The Kyll, noted by the Roman poet Ausonius as Celbis, is a 128 km long river in western Germany, left tributary of the Moselle. It rises in the Eifel mountains, near the border with Belgium and flows generally south through the towns Stadtkyll, Gerolstein, Kyllburg and east of Bitburg. It flows into the Moselle in Ehrang, a suburb of Trier.
Emmer is a river of Lower Saxony and North Rhine-Westphalia, Germany. It flows into the Weser in Emmerthal.
Eggel is a river of North Rhine-Westphalia, Germany. It is a left tributary of the Diemel. Its lower section defines the boundary between North Rhine-Westphalia and Hesse.
Twiste is a river of Hesse and of North Rhine-Westphalia, Germany. It is the most important tributary of the Diemel, which it joins in Warburg. Its largest tributaries are the Erpe, Watter, Aar and Wande.
Bigge is a river of North Rhine-Westphalia, Germany. It flows into the Lenne in Finnentrop.
Afte is a river of North Rhine-Westphalia, Germany. It is a tributary of the river Alme, into which it flows in Büren.
Ahse is a river of North Rhine-Westphalia, Germany. It flows into the Lippe near Hamm.
Altenau is a river of North Rhine-Westphalia, Germany. It is a right tributary of the Alme, which it joins in Borchen.
Aa is a river of North Rhine-Westphalia, Germany. It is a left tributary of the Werre, which it joins in Herford. It is formed by the confluence of two small streams in Bielefeld-Milse. In its upper part, it is called Johannisbach.
Dalke is a river of North Rhine-Westphalia, Germany. It flows into the Ems near Gütersloh.
Lutter is a river of North Rhine-Westphalia, Germany. It is a right tributary of the Ems in Harsewinkel.
Öse is a river of North Rhine-Westphalia, Germany. It is a left tributary of the Nethe in Siddessen.
Wapelbach is a river of North Rhine-Westphalia, Germany. It flows into the Dalke west of Gütersloh.
