<P> At the western point of the Free State , southwest of Kimberley , the Orange meets with its main tributary , the Vaal River , which itself forms much of the northern border of the province . From here the river flows further westward through the arid wilderness of the southern Kalahari region and Namaqualand in the Northern Cape Province to meet with Namibia at the 20th degree of east longitude . From here it flows westward for 550 km , forming the international border between the province and Namibia 's ǁKaras Region . On the border , the river passes the town of Vioolsdrif , the main border post between South Africa and Namibia . </P>
<P> At the western point of the Free State , southwest of Kimberley , the Orange meets with its main tributary , the Vaal River , which itself forms much of the northern border of the province . From here the river flows further westward through the arid wilderness of the southern Kalahari region and Namaqualand in the Northern Cape Province to meet with Namibia at the 20th degree of east longitude . From here it flows westward for 550 km , forming the international border between the province and Namibia 's ǁKaras Region . On the border , the river passes the town of Vioolsdrif , the main border post between South Africa and Namibia . </P>
where does the orange river and vaal river meet
where does the orange river and vaal river meet
western point of the Free State , southwest of Kimberley
western point of the Free State , southwest of Kimberley