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| | Geography of South Africa - Geographic Regions, Climate and Rainfall, Lakes and Rivers, Environmental Trends |
 | | South Africa's largest river, the Orange River, rises in the Drakensberg Mountains and flows to the west and northwest, draining the highlands of Lesotho before being joined by the Caledon River between the Eastern Cape province and the Free State. |
 | | The major tributary of the Orange River, the Vaal ("foul"--for its murky cast) River, rises in the Drakensbergs and flows westward, joining the Orange River from the north in Northern Cape province. |
 | | Other major rivers are the Breede River, the Komati River, the Olifants River, the Tugela River, and the Umzimvubu River, which run fairly short distances from the interior plateau to the ocean, and the Limpopo and Molopo rivers along the northern border with Botswana and Zimbabwe. |
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