Largest tributaries
The river Thielle (French: La Thielle, or La Thièle, German: Zihl), is a tributary to the Aare, in the Swiss Seeland.
The Thielle results from the merging of the Orbe and Talent, northeast of the little city of Orbe in the Swiss canton of Vaud. It flows as a channel northeastwards through an intensively cultivated plain called Plaine de l’Orbe and flows after only 9 km into the Lake of Neuchâtel at Yverdon-les-Bains.
