HydroBASINS lev08 watershed · #1081587950
Bassin de Steelpoortrivier
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 3 administrative regions : Ehlanzeni, Nkangala, Sekhukhune
Sub-basin area
1 717,1km²
Upstream area
2 483,7km²
Discharge
3,18m³/s
Mean elev.
1 543m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Steelpoortrivier417 km²
- Bassin de Grootspruit350 km²
3 dept-equivalent regions (GADM L2)
- 1018.5 km²59.4% of basin
- 679.5 km²39.7% of basin
- 15.6 km²0.9% of basin
9 intersecting protected areas
Greater Lakenvlei Protected Environment
IUCN Not ReportedProtected Environment
43.30 km² overlap
De Hoop Dam Protected Environment
IUCN Not ReportedProtected Environment
41.15 km² overlap
De Hoop Private Nature Reserve
IUCN Not ReportedNature Reserve
15.22 km² overlap
Houtenbek Private Nature Reserve
IUCN Not ReportedNature Reserve
11.64 km² overlap
Christiaans Private Nature Reserve
IUCN Not ReportedNature Reserve
10.39 km² overlap
Steelpoort Private Nature Reserve
IUCN Not ReportedNature Reserve
9.94 km² overlap
Grootrietvley Private Nature Reserve
IUCN Not ReportedNature Reserve
2.77 km² overlap
Verloren Valei Nature Reserve
IUCN Not ReportedWetland of International Importance (Ramsar Site)
2.35 km² overlap
Langkloof Private Nature Reserve
IUCN Not ReportedNature Reserve
1.15 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 600 distinct species · 25 993 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 20 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Steelpoortrivier : 19 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 14 interactions GloBI sur 3 types (connectance 7.4%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
15,7°C
Annual rain
770mm
Moisture idx (CMI)
-0,47
Runoff
47mm/an
PET
1 462mm
AET
649mm
Mean slope
6,0°
Water table
538cm
Forest
9%
Crops
21%
Urban
1%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)