| Pembuang River | |
| Name Other: | Sungai Seruyan, Soengai Saroejan, Soengai Pemboeang, Soengai Seroejan |
| Pushpin Map: | Indonesia |
| Subdivision Type1: | Country |
| Subdivision Name1: | Indonesia |
| Subdivision Type2: | Province |
| Subdivision Name2: | Central Kalimantan |
| Length: | 350km (220miles) |
| Discharge1 Location: | Java Sea (near mouth) |
| Discharge1 Avg: | 1216m3/s |
| Source1 Location: | Bikit Tikung, Schwaner Mountain Range |
| Mouth Location: | Java Sea |
| Mouth Coordinates: | -3.378°N 112.5405°W |
| Basin Size: | 12911km2[1] |
| Discharge2 Location: | Pembuang (Basin size: 7554km2[2] |
| Discharge2 Avg: | 723m3/s[3] |
Pembuang River or Seruyan River is a river of Borneo, Indonesia.[4] The river has its source near Bikit Tikung (1,175 metres) in the Schwaner Mountain Range.[5] The eastern side of the river contains dense forest down to Sembulu (Belajau) lakes and is said to be a major habitat of the orangutan.[5] Pembuang means "place of rejection".[6]
The river flows in the middle to the south of Borneo island with predominantly tropical rainforest climate (designated as Af in the Köppen-Geiger climate classification).[7] The annual average temperature in the area is 24 °C. The warmest month is November, when the average temperature is around 26 °C, and the coldest is February, at 23 °C.[8] The average annual rainfall is 3118 (2971-3480) mm. The wettest month is December, with an average of 491 mm rainfall, and the driest is September, with 67 mm rainfall.[9]
The Seruyan River (previously named Seroejan) is a river that crosses and flows in the Seruyan Regency, Central Kalimantan province, Indonesia. The river flows from north to south and empties into the Java Sea has a length of 350 Km and a navigable 300 Km through several cities, an average depth of 6 m and an average width of 300 m.
A number of its tributaries:
• Sembuluh Lake River
• Salau River
• Pukun River
• Kalua River
• Lanan River
• Bai River