HydroBASINS lev08 watershed · #1081652350
Bassin de Hex 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 1 administrative regions : West Coast
Sub-basin area
133,9km²
Upstream area
133,9km²
Discharge
0,36m³/s
Mean elev.
842m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
1 dept-equivalent regions (GADM L2)
- 133.8 km²100.0% of basin
4 intersecting protected areas
Sederberg Wilderness Area
IUCN Not ReportedForest Wilderness Area
83.15 km² overlap
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
83.06 km² overlap
Sederberg Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
44.73 km² overlap
Kromrivierkloof Nature Reserve
IUCN Not ReportedNature Reserve
0.34 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
710 distinct species · 2 536 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 Hex River : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 37 interactions GloBI sur 4 types (connectance 4.3%, filtre Serrano α=0.2). 11 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°
14,9°C
Annual rain
414mm
Moisture idx (CMI)
-0,70
Runoff
85mm/an
PET
1 406mm
AET
352mm
Mean slope
20,0°
Water table
950cm
Forest
13%
Crops
3%
Urban
0%
Protected
96%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)