The Emme is a river in Switzerland. It rises in the Alps between the peaks of Hohgant and Augstmatthorn in the canton of Bern. The Emme is 80 kilometres long and flows through the Emmental and between Zuchwil and Luterbach into the Aare. The drainage area is 983 km2 (380 sq mi). The average discharge at the mouth is approximately 20,000 litres per second. The maximum discharge can be up to 500,000 L/s (130,000 USgal/s).