08/05/2026
Water quality monitoring in places like the Okavango Delta can be strengthened by combining scientific methods with traditional ecological knowledge. For generations, local communities have closely observed the river system, understanding seasonal water changes, fish behaviour, plant indicators, and subtle shifts in water taste, colour, and flow. These observations can provide early signals of environmental change that complement scientific monitoring.
For example, many community members in the Delta recognise that the flood front, leleme la noka, is usually more turbid and brown in colour when it first arrives. Because of this, some communities avoid drinking the water at that stage until it clears. This aligns with water quality measurements, where the initial flood waters show higher turbidity and shifts in water chemistry. This kind of local knowledge helps guide safe water use.
By bringing together laboratory-based water quality data with the lived experiences and knowledge of river-dependent communities, we can build a holistic understanding of ecosystem health and how water quality changes over time. This approach not only improves monitoring but also supports more informed conservation and water management decisions grounded in both science and local knowledge.
This work is made possible through the partnership between National Geographic Society and De Beers Group.
📷 IMG 1,3: Monthusi Monkhanda, IMG 2: Bathusi Moatswi