Saaidam flood-irrigation system in
Nicola Vollmer
the Northern Cape, South Africa.
2025
The Hantam is known for its extremes: intense heat, cold, drought, and muted landscape punctuated by seasonal bursts of colour and life (Karoo-South Africa, n.d.). In this challenging environment, infrequent yet powerful river floods occur. For generations, residents have sought to survive here by capturing rainwater and groundwater (Palmer, 1966). The Saaidamme — a flood-irrigation system — emerged from this need, enabling farmers to harness floodwaters to sustain crops during extended dry periods. These farms are located in the semi-desert region of South Africa known as the Karoo (Karoo-South Africa, n.d.). The Karoo is a place with an incredible history, filled with stories and knowledge of how people have survived and flourished in a region often described as a “Place of Great Dryness” (The Great Karoo, 2017).
along the Hantamsrivier.
The Hantamsrivier originates in the Hantams Mountains and is further fed by runoff from the surrounding hills (de Klerk, 2024). Many farmers are located along the river and therefore must share its waters. It is often the case that the volume of water is sufficient to fully irrigate one farmer’s land but not enough to reach the furthest farm (de Klerk, 2024). If the river does reach the downstream farm, it is channelled through a series of embankments guiding the flow of the river into the system (uitkeerwalle), water channels (voore), and sluices (sluise) into the crop-dams (saaidamme). During this process, which can take several hours, the farmer and farm workers must attend to the various waterworks, ensuring a steady flow of water and the proper filling of the saaidamme (Visagie, 2024). Any excess water is released into overflow areas and returned to the Hantamsrivier.
This system is unique due to its unpredictability, the close interdependence between humans and nature, and the ability to survive and flourish in an otherwise harsh environment.
Circular Stories
This practice of slowing, diverting, and storing floodwaters has enhanced agricultural productivity by transforming floods from a threat into a valuable resource. The layout and formation of each individual saaidam farm are largely determined by the surrounding landscape. Whether situated between valleys or on expansive open plains, the underlying principle remains consistent across all case studies.
