HydroBASINS lev08 watershed · #1081625200
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 2 administrative regions : Frances Baard, Pixley ka Seme
Sub-basin area
550,8km²
Upstream area
150 917,1km²
Discharge
166,36m³/s
Mean elev.
1 147m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Vaal River504 km²
- Bassin de Vaal River123 km²
2 dept-equivalent regions (GADM L2)
- 524.7 km²95.4% of basin
- 25.3 km²4.6% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
627 distinct species · 22 278 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 13 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 : 11 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 9 interactions GloBI sur 3 types (connectance 11.5%, filtre Serrano α=0.2). 2 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°
18,1°C
Annual rain
412mm
Moisture idx (CMI)
-0,76
Runoff
43mm/an
PET
1 706mm
AET
347mm
Mean slope
1,3°
Water table
448cm
Forest
0%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)