HydroBASINS lev08 watershed · #1080015160
Bassin de Antjiesrivier
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 : Overberg
Sub-basin area
203,9km²
Upstream area
204,1km²
Discharge
1,68m³/s
Mean elev.
209m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 192.7 km²94.5% of basin
8 intersecting protected areas
Vogelgat Private Nature Reserve
IUCN Not ReportedNature Reserve
6.76 km² overlap
Fernkloof Nature Reserve
IUCN Not ReportedNature Reserve
6.58 km² overlap
Hoek van de Berg Private Nature Reserve
IUCN Not ReportedNature Reserve
4.63 km² overlap
Maanschynkop Nature Reserve
IUCN Not ReportedNature Reserve
3.66 km² overlap
Wetland of International Importance (Ramsar Site)
2.64 km² overlap
Walker Bay Whale Sanctuary Marine Protected Area
IUCN Not ReportedMarine Protected Area
1.93 km² overlap
Oude Bosch Private Nature Reserve
IUCN Not ReportedNature Reserve
0.88 km² overlap
Mount David Nature Reserve
IUCN Not ReportedNature Reserve
0.37 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 048 distinct species · 83 033 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Antjiesrivier : 40 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 36 interactions GloBI sur 4 types (connectance 3.6%, filtre Serrano α=0.2). 5 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°
15,5°C
Annual rain
671mm
Moisture idx (CMI)
-0,37
Runoff
266mm/an
PET
1 064mm
AET
567mm
Mean slope
9,4°
Water table
570cm
Forest
70%
Crops
21%
Urban
12%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)