HydroBASINS lev08 watershed · #7080411710
Bassin de Saint Lawrence River / Fleuve Saint-Laurent
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 : Le Haut-Saint-Laurent, Stormont, Dundas and Glengarry
Sub-basin area
25km²
Upstream area
778 935,8km²
Discharge
8 008,65m³/s
Mean elev.
47m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Saint Regis River2220 km²
- Bassin de Grays Creek45 km²
2 dept-equivalent regions (GADM L2)
- 8.8 km²35.0% of basin
- 3.5 km²14.0% of basin
1 intersecting protected areas
île Dodens Heronry
IUCN VIHeronry
0.27 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
586 distinct species · 14 736 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 43 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 Saint Lawrence River / Fleuve Saint-Laurent : 31 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 133 interactions GloBI sur 5 types (connectance 14.1%, filtre Serrano α=0.2). 13 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°
6,5°C
Annual rain
900mm
Moisture idx (CMI)
0,05
Runoff
537mm/an
PET
858mm
AET
650mm
Mean slope
0,6°
Water table
18cm
Forest
21%
Crops
48%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)