HydroBASINS lev08 watershed · #8080242090
Bassin de South Nahanni 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 : Fort Smith
Sub-basin area
258,1km²
Upstream area
8 973,9km²
Discharge
156,25m³/s
Mean elev.
1 590m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #80802415702377 km²
- Bassin de South Nahanni River323 km²
1 dept-equivalent regions (GADM L2)
- Fort Smith259.7 km²100.0% of basin
2 intersecting protected areas
National Park
232.92 km² overlap
National Park
26.80 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
39 distinct species · 39 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 20 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 South Nahanni River : 18 espèces reliées par 20 interactions GloBI sur 3 types (connectance 10.5%, filtre Serrano α=0.2). 2 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°
-7,9°C
Annual rain
561mm
Moisture idx (CMI)
0,28
Runoff
562mm/an
PET
403mm
AET
339mm
Mean slope
24,6°
Water table
543cm
Forest
3%
Crops
0%
Urban
0%
Protected
100%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)