HydroBASINS lev08 watershed · #1081653130
Bassin de Olifants 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 2 administrative regions : Cape Winelands, West Coast
Sub-basin area
954,9km²
Upstream area
954,9km²
Discharge
5,9m³/s
Mean elev.
765m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 553.2 km²58.0% of basin
- 401.1 km²42.0% of basin
7 intersecting protected areas
Winterhoek Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
326.92 km² overlap
Koue Bokkeveld Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
249.08 km² overlap
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
43.31 km² overlap
Grootwinterhoek Protected Environment
IUCN Not ReportedProtected Environment
43.01 km² overlap
Groot-Winterhoek Wilderness Area
IUCN Not ReportedForest Wilderness Area
42.86 km² overlap
Wagenboom Nature Reserve
IUCN Not ReportedNature Reserve
2.82 km² overlap
Opdrag Private Nature Reserve
IUCN Not ReportedNature Reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 272 distinct species · 21 887 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Olifants River : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 38 interactions GloBI sur 4 types (connectance 5.7%, filtre Serrano α=0.2). 10 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°
14,8°C
Annual rain
498mm
Moisture idx (CMI)
-0,63
Runoff
165mm/an
PET
1 369mm
AET
424mm
Mean slope
13,6°
Water table
616cm
Forest
27%
Crops
12%
Urban
0%
Protected
65%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)