HydroBASINS lev08 watershed · #8080267930
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
328,8km²
Upstream area
34 813,3km²
Discharge
461m³/s
Mean elev.
394m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de South Nahanni River306 km²
- Bassin de Windy Creek159 km²
1 dept-equivalent regions (GADM L2)
- Fort Smith330.7 km²100.0% of basin
2 intersecting protected areas
National Park
321.96 km² overlap
Nahanni National Park
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
67.14 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
312 distinct species · 1 467 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 108 interactions GloBI sur 3 types (connectance 13.2%, filtre Serrano α=0.2). 16 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°
-3,7°C
Annual rain
421mm
Moisture idx (CMI)
-0,25
Runoff
119mm/an
PET
565mm
AET
362mm
Mean slope
7,3°
Water table
103cm
Forest
94%
Crops
0%
Urban
0%
Protected
97%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)