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 km (50 miles) long and flows through the Emmental and into the Aare below Solothurn. The drainage area is 983 km² (380 sq. mi.). The average discharge at the mouth is approximately 20,000 litres (5,000 gallons) per second. The maximum discharge can be up to 500,000 litres (110,000 gallons) per second.