The Vaalharts Irrigation Scheme is one of the largest irrigation schemes in the world covering 369.50 square kilometres in the Northern Cape Province of South Africa. named after the Vaal River and the Harts river.The Vaal River, being one of its major tributaries.
Water from a diversion weir in the Vaal River, near Warrenton, flows through an 812 km long network of canals, watering 1,250 farms of average size of 0.25 square kilometres each in the lush valley.
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