HydroBASINS lev08 watershed · #1081656190
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 : Cacadu
Sub-basin area
705,9km²
Upstream area
14 162,9km²
Discharge
7,61m³/s
Mean elev.
489m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Driekoprivier639 km²
- Bassin de Sundays River129 km²
1 dept-equivalent regions (GADM L2)
- 705.5 km²100.0% of basin
2 intersecting protected areas
Addo Elephant National Park
IUCN Not ReportedNational Park
68.56 km² overlap
Mountain Zebra-Camdeboo Protected Environment
IUCN Not ReportedProtected Environment
59.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
415 distinct species · 2 787 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 : 31 espèces reliées par 27 interactions GloBI sur 4 types (connectance 4.5%, 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°
18,1°C
Annual rain
301mm
Moisture idx (CMI)
-0,80
Runoff
21mm/an
PET
1 523mm
AET
255mm
Mean slope
3,8°
Water table
725cm
Forest
8%
Crops
3%
Urban
0%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)