Batang Hari River Batang Hari, Sungai Batanghari, Djambi-rivier
The Batang Hari photographed during the 1877–79 Sumatra Expedition
Location of river mouth Show map of Sumatra Batang Hari River (Indonesia) Show map of Indonesia
Location
Country	Indonesia
Province	West Sumatra, Jambi
Regency	Solok Regency, South Solok Regency, Dharmasraya Regency, Bungo Regency, Tebo Regency, Batang Hari Regency, Muaro Jambi Regency, East Tanjung Jabung Regency, Jambi City
Physical characteristics
Source	Mount Rasan
• location	Solok Regency, West Sumatra
Mouth	Malacca Strait
• location	East Tanjung Jabung Regency, Jambi
Length	800 km (500 mi)[1]
Basin size	44,890 km2 (17,330 sq mi)[2] 46,504 km2 (17,955 sq mi)[1]
Discharge
• location	Batang Hari Delta, Malacca Strait
• average	(Period of data: 1992–2016)2,556 m3/s (90,300 cu ft/s)[2] (Period of data: 2016–2020)2,819 m3/s (99,600 cu ft/s)[3] 2,643 m3/s (93,300 cu ft/s)[1]

The Batang Hari (Indonesian: Sungai Batanghari) is the longest river in Sumatra island,^[4] Indonesia, about 600 kilometres (370 mi) northwest of the capital Jakarta.^[5]

Hydrology

The river originates in the Minangkabau Highlands, home of the Minangkabau people, and flows to the east coast of Sumatra. Trans-Sumatran Highway (AH25) crosses the river at the city of Jambi which is located near the mouth of the river. The Batang Hari is used by the local population for fishing, transportation, mining, and personal hygiene.^[6]

Geography

The river flows in the central area of Sumatra with a predominantly tropical rainforest climate (designated as Af in the Köppen–Geiger climate classification).^[7] The annual average temperature in the area is 23 °C (73 °F). The warmest month is April, when the average temperature is around 24 °C (75 °F), and the coldest is January, at 22 °C (72 °F).^[8] The average annual rainfall is 2383–3183 mm.^[9] The wettest month is December, with an average of 344 mm (13.5 in) rainfall, and the driest is August, with 90 mm rainfall.^[10]