12
Orange–Senqu River Basin Transboundary Diagnostic Analysis
NAMIBIA Windhoek
Gobabis
Mean annual precipitation (mm) 50–200 200–350 350–500 500–600 600–700 700–800 Nelspruit 800–1,000 >1,000
BOTSWANA Gaborone
Mariental Pretoria
Mahikeng Keetmanshoop
Johannesburg Vryburg
Upington
Kimberley Bloemfontein
Maseru Durban
LESOTHO
Springbok De Aar
Ä
N
2
SOUTH AFRICA 500 km AFRICA SOUTH
0
East London
Main town or city Perennial river Ephemeral river Orange–Senqu River basin International boundary
Figure 2: Mean annual precipitation
Mean annual evapotranspiration (mm)
NAMIBIA Windhoek
1,050–1,100
Gobabis
1,100–1,150
BOTSWANA
1,150–1,200 1,200–1,250
Gaborone
1,250–1,300
Mariental
1,300–1,350 Nelspruit 1,350–1,400
Pretoria
Mahikeng
1,400–1,450
Keetmanshoop
Johannesburg
1,450–1,500
Vryburg
1,500–1,550 1,550–1,600 1,600–1,650
Upington
Kimberley Bloemfontein
Maseru Durban
LESOTHO
Springbok De Aar
Ä
N
2
0
Figure 3: Mean annual evapo-transpiration
SOUTH AFRICA 500 km AFRICA SOUTH
East London
Main town or city Perennial river Ephemeral river Orange–Senqu River basin International boundary