Rokan River is a river in Riau province, central-eastern Sumatra , Indonesia , about 1,100 km northwest of the capital Jakarta .
4-559: The river originates in the Barisan Mountains in the west, and drains northeast-ward along Rokan Hulu Regency and Rokan Hilir Regency with estuarine located near the port town of Bagansiapiapi draining the water to Malacca Strait . Tributaries include the Rokan-kiri River , Rokan-kanan River , Kumu River . The river flows in the central area of Sumatra with predominantly tropical rainforest climate (designated as Af in
8-566: Is situated towards the southern end of the range in Liwa, Indonesia . The name Bukit Barisan actually means "row of hills" or "hills that make a row" in Malay , for the range stretches end to end along the island of Sumatra . There are 35 active volcanoes in Bukit Barisan. The largest volcano is the supervolcano Toba within the 100 km (62 miles) × 30 km (19 miles) Lake Toba, which
12-463: The Barisan Mountains are a mountain range on the western side of Sumatra , Indonesia , covering nearly 1,700 km (1,050 mi) from the north to the south of the island. The Bukit Barisan range consists primarily of volcanoes shrouded in dense jungle cover, including Sumatran tropical pine forests on the higher slopes. The highest peak of the range is Mount Kerinci at 3,800 metres (12,467 ft). The Bukit Barisan Selatan National Park
16-604: The Köppen-Geiger climate classification). The annual average temperature in the area is 23 °C. The warmest month is March, when the average temperature is around 24 °C, and the coldest is January, at 22 °C. The average annual rainfall is 3766 mm. The wettest month is November, with an average of 336 mm rainfall, and the driest is July, with 113 mm rainfall. 2°00′00″N 100°52′00″E / 2.0°N 100.86667°E / 2.0; 100.86667 Barisan Mountains The Bukit Barisan or
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