Area of supply
The study area comprises the water resources of the Upper and Lower Orange River
Water Management Areas (WMAs), while also considering all the tributary rivers
and transfers affecting the water balance of the system. This core area forms
part of the Orange-Senqu River Basin, which straddles four International Basin
States with the Senqu River originating in the highlands of Lesotho, Botswana in
the north eastern part of the Basin, the Fish River in Namibia and the largest
area situated in South Africa.