HydroBASINS lev08 watershed · #1081632360
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 1 administrative regions : Xhariep
Sub-basin area
129,8km²
Upstream area
10 281,3km²
Discharge
6,59m³/s
Mean elev.
1 257m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Riet River416 km²
- Bassin de Riet River36 km²
1 dept-equivalent regions (GADM L2)
- 129.7 km²100.0% of basin
1 intersecting protected areas
Kalkfontein Dam Nature Reserve
IUCN Not ReportedNature Reserve
35.73 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
143 distinct species · 280 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 17 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 : 13 espèces reliées par 15 interactions GloBI sur 2 types (connectance 11.0%, filtre Serrano α=0.2). 4 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°
17,4°C
Annual rain
421mm
Moisture idx (CMI)
-0,73
Runoff
19mm/an
PET
1 577mm
AET
355mm
Mean slope
1,4°
Water table
326cm
Forest
0%
Crops
2%
Urban
0%
Protected
28%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)