HydroBASINS lev08 watershed · #7080374950
Bassin de 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 3 administrative regions : Bécancour, Francheville, Nicolet-Yamaska
Sub-basin area
190,3km²
Upstream area
986 574,3km²
Discharge
11 061,34m³/s
Mean elev.
25m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
3 dept-equivalent regions (GADM L2)
- 58.5 km²30.7% of basin
- 41.4 km²21.7% of basin
- 36.8 km²19.3% of basin
11 intersecting protected areas
Water fowl gathering area
8.13 km² overlap
Water fowl gathering area
5.07 km² overlap
Water fowl gathering area
2.99 km² overlap
Muskrat habitat
0.39 km² overlap
Muskrat habitat
0.37 km² overlap
Ecological reserve
0.32 km² overlap
Muskrat habitat
0.06 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.05 km² overlap
Ecological reserve
0.03 km² overlap
2 more protected areassorted by overlap area
Recognized nature reserve
0.02 km² overlap
Recognized nature reserve
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 818 distinct species · 158 155 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Fleuve Saint-Laurent : 19 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 83 interactions GloBI sur 4 types (connectance 17.8%, filtre Serrano α=0.2). 12 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°
5,2°C
Annual rain
1 013mm
Moisture idx (CMI)
0,20
Runoff
615mm/an
PET
809mm
AET
651mm
Mean slope
0,5°
Water table
27cm
Forest
15%
Crops
42%
Urban
19%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)