HydroBASINS lev08 watershed · #1081656680
Bassin de Bosrivier
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
391,5km²
Upstream area
391,7km²
Discharge
3,11m³/s
Mean elev.
621m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 274.2 km²70.1% of basin
- 117.1 km²29.9% of basin
6 intersecting protected areas
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
200.52 km² overlap
Groot-Winterhoek Wilderness Area
IUCN Not ReportedForest Wilderness Area
178.27 km² overlap
Winterhoek Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
32.15 km² overlap
Koue Bokkeveld Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
0.71 km² overlap
Die Eiland Private Nature Reserve
IUCN Not ReportedNature Reserve
0.55 km² overlap
Grootwinterhoek Protected Environment
IUCN Not ReportedProtected Environment
0.50 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 404 distinct species · 9 673 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Bosrivier : 32 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 35 interactions GloBI sur 4 types (connectance 4.3%, filtre Serrano α=0.2). 9 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°
15,1°C
Annual rain
578mm
Moisture idx (CMI)
-0,56
Runoff
206mm/an
PET
1 349mm
AET
492mm
Mean slope
11,8°
Water table
577cm
Forest
18%
Crops
28%
Urban
1%
Protected
54%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)