| Batang Hari River | |
| Name Other: | Batang Hari, Sungai Batanghari, Djambi-rivier |
| Map Size: | 285 |
| Pushpin Map: | Indonesia Sumatra#Indonesia |
| Pushpin Map Size: | 285 |
| Pushpin Map Caption: | Location of river mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | Indonesia |
| Subdivision Type2: | Province |
| Subdivision Name2: | West Sumatra, Jambi |
| Subdivision Type3: | Regency |
| Subdivision Name3: | Solok Regency, South Solok Regency, Dharmasraya Regency, Bungo Regency, Tebo Regency, Batang Hari Regency, Muaro Jambi Regency, East Tanjung Jabung Regency, Jambi City |
| Length: | 800km (500miles)[1] |
| Discharge1 Avg: | (Period of data: 1992–2016)2556m3/s[2] (Period of data: 2016–2020)2819m3/s[3] 2643m3/s |
| Source1: | Mount Rasan |
| Source1 Location: | Solok Regency, West Sumatra |
| Mouth: | Malacca Strait |
| Mouth Location: | East Tanjung Jabung Regency, Jambi |
| Basin Size: | 44890km246504km2 |
The Batang Hari (Indonesian: Sungai Batanghari) is the longest river in Sumatra island,[4] Indonesia, about 600km (400miles) northwest of the capital Jakarta.[5]
The river originates in West Sumatra Province, in the Minangkabau Highlands, home of the Minangkabau people, and flows through Jambi Province to the east coast of Sumatra, reaching the sea in Nipah Panjang District of East Tanjung Jabung Regency. The Trans-Sumatran Highway (AH25) crosses the river at the city of Jambi which is located at some distance from the mouth of the river. The Batang Hari is used by the local population for fishing, transportation, mining, and personal hygiene.[6]
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 23C. The warmest month is April, when the average temperature is around 24C, and the coldest is January, at 22C.[8] The average annual rainfall is 2383–3183 mm.[9] The wettest month is December, with an average of rainfall, and the driest is August, with 90 mm rainfall.[10]