HydroBASINS lev08 watershed · #1081651160
Bassin de Tarka 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 : Chris Hani
Sub-basin area
147km²
Upstream area
3 753,8km²
Discharge
2,17m³/s
Mean elev.
1 077m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Poortrivier158 km²
- Bassin de Tarka River14 km²
1 dept-equivalent regions (GADM L2)
- 146.9 km²100.0% of basin
2 intersecting protected areas
Commandodrift Nature Reserve
IUCN Not ReportedNature Reserve
2.95 km² overlap
Mountain Zebra-Camdeboo Protected Environment
IUCN Not ReportedProtected Environment
1.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
204 distinct species · 1 125 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 Tarka River : 19 espèces reliées par 17 interactions GloBI sur 4 types (connectance 6.7%, 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°
15,7°C
Annual rain
428mm
Moisture idx (CMI)
-0,71
Runoff
20mm/an
PET
1 458mm
AET
363mm
Mean slope
6,9°
Water table
604cm
Forest
0%
Crops
0%
Urban
0%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)