ā¦flow is regulated by the Vaal Dam, 23 miles (37 km) upstream of Vereeniging. Near Warrenton, water is diverted into the Vaalhartz irrigation scheme. The riverās major tributariesāthe Klip, Wilge, Vals, Vet, and Riet riversāenter on its left bank. The Vaal is fully developed economically, its waters used for theā¦
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