oa Civil Engineering = Siviele Ingenieurswese - Overview of the Palmiet Pumped Storage Scheme



The Palmiet Pumped Storage Scheme is an essential part of the Palmiet River Government Water Scheme, the objective of which is to make the Palmiet River, one of the last large conventional water sources in the south-western Cape, available for urban water supply to the Cape Town metropolitan region. The first phase of the scheme, descriptionbed in White Paper K-82, entails a pumped storage hydro-electric scheme with its lower reservoir on the Palmiet River, an upper reservoir on the watershed between the Palmiet and Steenbras Rivers, and a canal in which water can be conveyed from the upper reservoir to the existing upper reservoir of the Steenbras Pumped Storage Scheme (see Fig 1). The pumping capacity of the hydro-electric station is used for a small proportion of the available time to pump water, additional to that required for peak-time generation of electricity, to the upper reservoir for subsequent release to the Steenbras Reservoir. In this way the dependable yield of the Steenbras Reservoir can be increased initially by some 30 million m3 per annum and ultimately by a figure of 140 million m3 per annum.


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