Banyuasin RiverThe Banyuasin River is a river in southern Sumatra, Indonesia, about 500 km northwest of the capital Jakarta.GeographyThe river flows in the southern area of Sumatra with predominantly tropical rainforest climate. The annual average temperature in the area is 23 °C. The warmest month is July, when the average temperature is around 24 °C, and the coldest is March, at 22 °C. The average annual rainfall is 2579 mm. The wettest month is April, with an average of 344 mm rainfall, and the driest September, with 99 mm rainfall.