Watershedding: A Risky Proposition

The notion that "watershedding"—the scheduled shutdown of water systems—is a simple or inevitable solution is a dangerous oversimplification, according to this analysis. While South Africa is accustomed to the disruptions of loadshedding, the complexities and risks associated with managing water supply in this manner are far greater and less understood.

Unlike electricity, water's incompressibility and the intricate nature of reticulation systems mean that shutting off supply is not a clean process. The article highlights critical risks: the potential for "water hammer," a destructive shockwave caused by rapid pressure changes, which can damage infrastructure. Even more concerning is the increased vulnerability to contamination. When water pressure drops, leaks become entry points for pollutants, potentially turning the purified water supply into a vector for disease, especially if leaks are near sewer lines.

Furthermore, the practical implementation of watershedding is fraught with inequality. The article points out that water systems drain and refill unevenly. This means that during scheduled outages, some communities might still have water, while others face extended periods without any supply, or only a trickle. This disparity, coupled with the contamination risks, makes watershedding a far more problematic and potentially hazardous undertaking than the analogy with electricity loadshedding suggests. The commentary serves as a stark warning against treating water supply management with the same casualness as electricity rationing.