The Gariep River is the longest river in South Africa, stretching approximately 1,600 kilometers. It originates in the Drakensberg Mountains and flows southwest, eventually merging with the Orange River. The river plays a crucial role in irrigation and water supply for agriculture in the region. The Gariep Dam, one of the largest dams in South Africa, is located on the river and serves multiple purposes, including hydroelectric power generation and flood control. The river and dam are vital for local ecosystems and support various recreational activities, such as fishing and boating.