HydroBASINS lev08 watershed · #1081632980
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
82,1km²
Upstream area
9 279,3km²
Discharge
5,77m³/s
Mean elev.
1 262m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Riet River875 km²
- Bassin de Kromellenboogspruit270 km²
1 dept-equivalent regions (GADM L2)
- 82.0 km²100.0% of basin
1 intersecting protected areas
Kalkfontein Dam Nature Reserve
IUCN Not ReportedNature Reserve
6.97 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
61 distinct species · 68 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 14 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 : 12 espèces reliées par 13 interactions GloBI sur 2 types (connectance 14.3%, 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°
17,1°C
Annual rain
420mm
Moisture idx (CMI)
-0,73
Runoff
25mm/an
PET
1 565mm
AET
355mm
Mean slope
2,0°
Water table
274cm
Forest
0%
Crops
0%
Urban
0%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)