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 20,210 km2 (7,803 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 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 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.
The Diemel is a river in Hesse and North Rhine-Westphalia, Germany. It is a left tributary of the Weser.
Elsoff is a river of North Rhine-Westphalia and Hesse, Germany. It is a left tributary of the Eder, which it joins near Hatzfeld.
Schlüsselgrund is a small river of Hesse and North Rhine-Westphalia, Germany. It flows into the Calenberger Bach near Warburg.
Calenberger Bach is a small river of Hesse and North Rhine-Westphalia, Germany. It flows into the Diemel in Warburg.
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.
Hoppecke is a river in North Rhine-Westphalia and Hesse, Germany. It flows into the Diemel near Marsberg.
Itter is a river of Hesse and of North Rhine-Westphalia, Germany. It is a left tributary of the Diemel. It flows through Willingen.
Neerdar is a river of North Rhine-Westphalia and of Hesse, Germany. It is a left tributary of the Wilde Aa near Korbach.
Nuhne is a river of North Rhine-Westphalia and of Hesse, Germany. It is a left tributary of the Eder, which it joins near Frankenberg.
Olfe is a river of Hesse and of North Rhine-Westphalia, Germany. It is a left tributary of the Nuhne near Neukirchen.
Orke is a river of North Rhine-Westphalia and of Hesse, Germany. It flows into the Eder in Ederbringhausen, Hesse.
Orpe is a river of North Rhine-Westphalia and Hesse, Germany. It flows into the Diemel in Diemelstadt-Wrexen.
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.
Große Aa is a small river of North Rhine-Westphalia, Germany.
Kleine Aa is a river of North Rhine-Westphalia, Germany, a tributary of the Aabach. Thus it is part of the Rhine River Basin.
