HydroBASINS lev08 watershed · #1081608870
Bassin de Vaal River
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 : Fezile Dabi, Gert Sibande, Sedibeng
Sub-basin area
1 924,8km²
Upstream area
20 298,9km²
Discharge
28,09m³/s
Mean elev.
1 549m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Vaal River1660 km²
- Bassin de Watervalriver56 km²
3 dept-equivalent regions (GADM L2)
- 1013.6 km²52.8% of basin
- 772.2 km²40.2% of basin
- 135.6 km²7.1% of basin
8 intersecting protected areas
Vaaldam Nature Reserve
IUCN Not ReportedNature Reserve
160.06 km² overlap
S. J. van der Merwe Private Nature Reserve
IUCN Not ReportedNature Reserve
14.13 km² overlap
J. N. Van Der Merwe Private Nature Reserve
IUCN Not ReportedNature Reserve
11.47 km² overlap
Klipkraal Protected Environment
IUCN Not ReportedProtected Environment
9.06 km² overlap
Leeuwfontein Private Nature Reserve
IUCN Not ReportedNature Reserve
8.71 km² overlap
Lourensa Game Farm
IUCN Not ReportedNature Reserve
5.55 km² overlap
Klipkraal Hollenbach Protected Environment
IUCN Not ReportedProtected Environment
1.04 km² overlap
Klipkraal Nature Reserve
IUCN Not ReportedNature Reserve
0.45 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
671 distinct species · 42 569 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 25 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 Vaal River : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 20 interactions GloBI sur 3 types (connectance 6.2%, filtre Serrano α=0.2). 5 bulles taxonomiques (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°
15,5°C
Annual rain
697mm
Moisture idx (CMI)
-0,53
Runoff
19mm/an
PET
1 499mm
AET
589mm
Mean slope
1,4°
Water table
348cm
Forest
0%
Crops
44%
Urban
0%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)