HydroBASINS lev08 watershed · #7080325940
Bassin de Ruisseau Gagnon
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 : La Haute-Côte-Nord, Le Fjord-du-Saguenay
Sub-basin area
76,4km²
Upstream area
85 259,8km²
Discharge
1 842,72m³/s
Mean elev.
144m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
2 dept-equivalent regions (GADM L2)
- 50.7 km²66.1% of basin
- 25.9 km²33.9% of basin
4 intersecting protected areas
Marine park
19.71 km² overlap
Marine Park
19.70 km² overlap
Quebec's national park
18.93 km² overlap
09751R002 Biological Refuge
IUCN IVBiological refuge
0.73 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
213 distinct species · 2 592 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 Ruisseau Gagnon : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 5 types (connectance 12.6%, 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°
2,5°C
Annual rain
984mm
Moisture idx (CMI)
0,30
Runoff
681mm/an
PET
691mm
AET
594mm
Mean slope
8,2°
Water table
222cm
Forest
63%
Crops
0%
Urban
0%
Protected
52%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)