HydroBASINS lev08 watershed · #1080014970
Bassin de Duiwenhoksrivier
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
1 121,6km²
Upstream area
1 121,7km²
Discharge
1,44m³/s
Mean elev.
243m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 1083.6 km²96.6% of basin
- 37.4 km²3.3% of basin
8 intersecting protected areas
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
73.77 km² overlap
Boosmansbos Wilderness Area
IUCN Not ReportedForest Wilderness Area
66.17 km² overlap
Langeberg-East Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
40.17 km² overlap
Wilderness Nature Reserve
IUCN Not ReportedNature Reserve
6.22 km² overlap
Duivenhoksriviermond Private Nature Reserve
IUCN Not ReportedNature Reserve
1.46 km² overlap
Hessequa Hills Private Nature Reserve
IUCN Not ReportedNature Reserve
1.12 km² overlap
Pierre-Jeanne Gerber No 10 Private Nature Reserve
IUCN Not ReportedNature Reserve
1.06 km² overlap
Heidelberg Nature Reserve
IUCN Not ReportedNature Reserve
0.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 023 distinct species · 36 123 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Duiwenhoksrivier : 34 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 38 interactions GloBI sur 5 types (connectance 4.9%, filtre Serrano α=0.2). 6 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°
16,9°C
Annual rain
483mm
Moisture idx (CMI)
-0,64
Runoff
42mm/an
PET
1 349mm
AET
411mm
Mean slope
5,8°
Water table
712cm
Forest
36%
Crops
40%
Urban
0%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)