HydroBASINS lev08 watershed · #1081626030
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 : Frances Baard, Pixley ka Seme, Siyanda
Sub-basin area
246,7km²
Upstream area
152 696,1km²
Discharge
169,22m³/s
Mean elev.
1 238m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #10816251501533 km²
- Bassin de Vaal River551 km²
3 dept-equivalent regions (GADM L2)
- 147.0 km²59.7% of basin
- 72.8 km²29.6% of basin
- 26.5 km²10.8% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
360 distinct species · 5 031 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 24 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 : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 17 interactions GloBI sur 3 types (connectance 6.2%, 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°
17,5°C
Annual rain
404mm
Moisture idx (CMI)
-0,76
Runoff
42mm/an
PET
1 674mm
AET
341mm
Mean slope
0,8°
Water table
380cm
Forest
0%
Crops
0%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)