The Wampu River is a river in North Sumatra

North Sumatra

North Sumatra is a province of Indonesia on the Sumatra island. Its capital is Medan. It is the most populous Indonesian province outside of Java. It is slightly larger than Sri Lanka in area.- Geography and population :...

, Indonesia. It rises as the Lau Biang river in Karo Regency

Karo Regency

Karo Regency is a regency of North Sumatra, Indonesia. It is situated in the Bukit Barisan mountains. In 2000, the regency covered an area of 2,127.25 square kilometres and according to the 2000 census it had a population of 279,470. 60.99% of the regency is forested. Its regency seat is...

 near Siberaya, flowing past Kabanjahe

Kabanjahe

Kabanjahe is a town approximately 2 hours from Medan, North Sumatra, Indonesia. Kabanjahe is to the south of Berastagi. Kabanjahe is the capital of Karo Regency. Frequent buses connect the two towns and a journey takes about 30 minutes....

, Perbesi, Kuta Buluh, Marike and onto Bohorok

Bohorok

Bahorok or Bohorok is a subdistrict of Langkat Regency. Its capital is Bohorok town, and Bukit Lawang is a major local tourist attraction for viewing orangutans....

 in Langkat Regency

Langkat Regency

Langkat Regency is the northernmost regency in eastern shore of North Sumatra. Its seat is Stabat. Its area is 6,272 km² and population was 892,533 in the 2000 national Census, and official intercensal estimate in 2007 of 1,027,414 people....

, where the river is known as the Wampu. It flows past Stabat

Stabat

Stabat is a town in North Sumatra province of Indonesia and it is the seat of Langkat Regency.Stabat town lies on the road between Medan and Banda Aceh, a short distance past the city of Binjai....

 and Tanjung Langkat before emptying into the Strait of Malacca

Strait of Malacca

The Strait of Malacca is a narrow, stretch of water between the Malay Peninsula and the Indonesian island of Sumatra. It is named after the Malacca Sultanate that ruled over the archipelago between 1414 to 1511.-Extent:...

. The Bohorok River

Bohorok River

The Bohorok River is a river of the Langkat Regency in North Sumatra Province, Indonesia.In October 2003, a large-scale flash flood killed 242 persons....

 is a tributary of the Wampu.

Much of the river valley was once fertile rainforest, but most has now been destroyed for logging and oil palm

Oil palm

The oil palms comprise two species of the Arecaceae, or palm family. They are used in commercial agriculture in the production of palm oil. The African Oil Palm Elaeis guineensis is native to West Africa, occurring between Angola and Gambia, while the American Oil Palm Elaeis oleifera is native to...

plantations.