HydroBASINS lev08 watershed · #1080015000
Bassin de Breede 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 : Eden, Overberg
Sub-basin area
1 782,2km²
Upstream area
12 511,3km²
Discharge
57,41m³/s
Mean elev.
134m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Tradourivier728 km²
- Bassin de Breede River389 km²
2 dept-equivalent regions (GADM L2)
- 896.7 km²50.3% of basin
- 885.1 km²49.7% of basin
7 intersecting protected areas
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
26.03 km² overlap
De Hoop Nature Reserve
IUCN Not ReportedNature Reserve
25.86 km² overlap
Skeiding Nature Reserve
IUCN Not ReportedNature Reserve
11.23 km² overlap
Hasekraal Private Nature Reserve
IUCN Not ReportedNature Reserve
11.22 km² overlap
Duin-'n-See Private Nature Reserve
IUCN Not ReportedNature Reserve
1.70 km² overlap
San Sebastian Private Nature Reserve
IUCN Not ReportedNature Reserve
1.49 km² overlap
Witsand Local Nature Reserve
IUCN Not ReportedNature Reserve
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 046 distinct species · 111 945 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Breede River : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 30 interactions GloBI sur 4 types (connectance 5.7%, filtre Serrano α=0.2). 3 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°
17,6°C
Annual rain
545mm
Moisture idx (CMI)
-0,59
Runoff
57mm/an
PET
1 327mm
AET
463mm
Mean slope
3,6°
Water table
620cm
Forest
14%
Crops
57%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)