Rivers of Gauteng, South Africa: Vaal & Tributaries
Gauteng—South Africa's smallest but most populous province—is watered by the Vaal River system and its tributaries.
Vaal River — The Backbone
- Source: Near Ermelo, Mpumalanga (1,800m)
- Course: Westward across Gauteng → forms NW/Free State border → joins Orange River at Douglas
- Length: 1,120 km (2nd longest in SA)
- Gauteng role: Primary water source (Rand Water abstracts ~4,500 Ml/day)
- Major dams: Vaal Dam (2.6B m³), Bloemhof Dam (1.2B m³)
Key Tributaries Within Gauteng
| River | Course in Gauteng | Confluence | Notes |
|---|
| Jukskei | N Johannesburg → Sandton → Alexandra | Crocodile (E) | Urban pollution hotspot; Jukskei Park rehabilitation |
| Crocodile (East) | E Rand → Pretoria N → Hartbeespoort Dam | Vaal (S) | Hartbeespoort = eutrophication icon |
| Hennops | Centurion → Irene → Midrand | Vaal (S) | Hennops Hiking Trail; urban impacts |
| Magalies | W Gauteng (Magaliesberg foothills) | Crocodile (E) | Magaliesberg Biosphere Reserve |
| Wilge | S Gauteng (Vereeniging area) | Vaal (E) | Coal mining impacts |
| Klip | Soweto → Lenasia | Vaal (S) | Historic pollution (gold mining) |
| Rietspruit | Ekurhuleni | Blesbokspruit → Vaal | Marievale Bird Sanctuary (Ramsar) |
Water Security Challenges
- Demand > yield: Gauteng uses ~110% of local yield; imports from Lesotho (LHWP Phases 1&2)
- Quality: Acid mine drainage (Witwatersrand), sewage, industrial, urban runoff
- Climate: High variability; 2015–17 drought nearly triggered "Day Zero"
- Institutional: Rand Water (bulk), municipalities (retail), DWS (regulation), CMA (catchment)
Restoration Initiatives
- Jukskei River Rehabilitation (Alexandra, City of Joburg)
- Hartbeespoort Remediation (hyacinth harvesting, nutrient stripping)
- Blesbokspruit / Marievale wetland restoration
- Source-to-sea: Vaal-Orange catchment management strategy
Gauteng's rivers are working hard—and need help to keep working.
Wanderlust World