The Simpang-kanan River (Indonesian: Sungai Simpangkanan, lit.

[3] The Simpang-kanan River rises up on Mount Bujang (1951 meter), converging with the Simpang-kiri River, which springs from Lumut Hill (1500 meter), northwest of Hulu Simpang Kiri Hill (1003 meter) and changing name into the Rawas River, a tributary of the Musi River.

[3] The river flows in the southern area of Sumatra with predominantly tropical rainforest climate (designated as Af in the Köppen–Geiger climate classification).

The warmest month is October, when the average temperature is around 24 °C, and the coldest is June, at 22 °C.

The wettest month is December, with an average of 482 mm rainfall, and the driest is June, with 115 mm rainfall.