[1][2] This river is the natural boundary between the Cianjur and Garut regencies.

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

[4] The annual average temperature in the area is 23 °C.

The warmest month is August, when the average temperature is around 26 °C, and the coldest is June, at 24 °C.

The wettest month is December, with an average of 553 millimetres (21.8 in) rainfall, and the driest is September, with 72 millimetres (2.8 in) rainfall.