Turning: How Africa’s Just Energy Transition Has Already Shifted Water Planning
In a briefing released on 3 October, the South African Climate Institute unveiled a draft “Just Energy Transition” framework that explicitly maps water use across upcoming renewable projects. The document earmarks 1.2 billion cubic metres of water for cooling in new solar‑thermal farms and for mining‑linked power generation. Water‑security experts say the omission of such data in earlier plans led to hidden costs for farmers and towns. Integrating water considerations now could determine whether the continent meets its 2030 electricity‑access goal without sparking fresh water crises.
What the Blueprint Says About Water
The draft framework, prepared by the South African Climate Institute in partnership with the African Development Bank, was released to the public on 3 October 2024. It identifies 12 major water‑intensive energy projects slated for construction between 2025 and 2035, including a 2 GW solar‑thermal plant in the Karoo and a 1.5 GW battery‑storage facility near the Vaal River. According to an account to Bird Story Agency, the plan allocates a total of 3.4 billion cubic metres of water for cooling, hydro‑electric expansion, and ancillary industrial use. A concrete detail: the Karoo plant’s cooling system will draw 250 million cubic metres annually from underground aquifers, a figure that triggered a public hearing in Bloemfontein last month. The framework also sets a target that no new energy project should increase regional water stress by more than 5 percent, a metric derived from the UN‑Water baseline. The document lists 23 stakeholder groups—from mining companies to irrigation cooperatives—who must sign off on water‑impact assessments before any permit is granted.
Why Water Integration Matters to Africans
First, water scarcity directly affects food security. In the Eastern Cape, farmers already report reduced irrigation yields after the 2022 drought; adding a power‑plant that consumes an extra 30 million cubic metres could push the region over the threshold of sustainable use. Second, the health of urban populations hinges on reliable water supplies. Johannesburg’s western suburbs have seen pipe‑leakage rates climb to 45 percent, a situation that could worsen if new cooling‑tower discharges increase river pollution. Third, the economic calculus of the energy transition changes when water costs are internalised. A recent analysis by the Institute for Sustainable Development in Africa (ISDA) shows that factoring water tariffs raises the levelised cost of electricity for solar‑thermal projects by roughly 12 percent, narrowing the gap with wind power. For ordinary households, this could translate into higher monthly
Despite its desert location, the Karoo solar‑thermal plant will draw more water annually than the entire Vaal River’s average flow during drought years.
