HydroBASINS lev08 watershed · #1081660120
Bassin de Tradourivier
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
727,8km²
Upstream area
727,9km²
Discharge
0,97m³/s
Mean elev.
478m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 601.7 km²82.7% of basin
- 125.9 km²17.3% of basin
10 intersecting protected areas
Langeberg-Wes Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
106.06 km² overlap
Langeberg-East Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
57.29 km² overlap
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
34.17 km² overlap
Marloth Nature Reserve
IUCN Not ReportedForest Nature Reserve
11.12 km² overlap
Klipfontein Private Nature Reserve
IUCN Not ReportedNature Reserve
10.79 km² overlap
Kannaland Private Nature Reserve
IUCN Not ReportedNature Reserve
7.18 km² overlap
Botterboom Private Nature Reserve
IUCN Not ReportedNature Reserve
7.06 km² overlap
Bontebok National Park
IUCN Not ReportedNational Park
3.05 km² overlap
Boosmansbos Wilderness Area
IUCN Not ReportedForest Wilderness Area
1.27 km² overlap
1 more protected areassorted by overlap area
Skeiding Nature Reserve
IUCN Not ReportedNature Reserve
0.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 117 distinct species · 50 980 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 Tradourivier : 36 espèces reliées par 37 interactions GloBI sur 3 types (connectance 4.5%, 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°
16,2°C
Annual rain
477mm
Moisture idx (CMI)
-0,65
Runoff
43mm/an
PET
1 367mm
AET
406mm
Mean slope
10,1°
Water table
822cm
Forest
40%
Crops
28%
Urban
0%
Protected
25%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)