HydroBASINS lev08 watershed · #1081629140
Bassin de Riet 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, Xhariep
Sub-basin area
795,9km²
Upstream area
12 602,4km²
Discharge
8,29m³/s
Mean elev.
1 169m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 4 basins
- Bassin de Orange-Riet River Canal654 km²
- Bassin · #1080058130630 km²
- Bassin de Riet River595 km²
- Bassin de Riet River155 km²
3 dept-equivalent regions (GADM L2)
- 749.5 km²94.3% of basin
- 45.1 km²5.7% of basin
- 0.3 km²0.0% of basin
1 intersecting protected areas
Doornhoek Game Reserve
IUCN Not ReportedNature Reserve
12.35 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
308 distinct species · 1 429 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 22 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 Riet River : 16 espèces reliées par 21 interactions GloBI sur 3 types (connectance 9.1%, filtre Serrano α=0.2). 6 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°
17,6°C
Annual rain
424mm
Moisture idx (CMI)
-0,74
Runoff
31mm/an
PET
1 633mm
AET
358mm
Mean slope
0,7°
Water table
268cm
Forest
0%
Crops
5%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)