The
Kasai River (called
Cassai in Angola) is a tributary of the
Congo River, located in central
Africa. The river begins in
Angola and serves as the border between Angola and the
Democratic Republic of the Congo (DRC), when it flows into the DRC,the Kasai joins the Congo at
Kwamouth northeast of Kinshasa. The Kasai's
tributaries include the
Fimi,
Kwango, and
Sankuru rivers. The short stretch of the Kasai from the inflow of the Fimi to the Congo is known as the
Kwah River. The Kasai basin consists mainly of equatorial rainforest areas, which provide an agricultural land in a region noted for its infertile, sandy soil. It is a tributry of Congo river and diamonds are found in this river. Around 60% of diamonds in Belgium go from Kasai river for cutting and shaping.