HydroBASINS lev08 watershed · #7080364390
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 5 administrative regions : Communauté-Urbaine-de-Québec, La Jacques-Cartier, Les Chutes-de-la-Chaudière, Lotbinière, Portneuf
Sub-basin area
771,1km²
Upstream area
1 045 128,3km²
Discharge
12 159,82m³/s
Mean elev.
80m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
5 dept-equivalent regions (GADM L2)
- 211.4 km²27.3% of basin
- 209.6 km²27.1% of basin
- 118.8 km²15.4% of basin
- 70.7 km²9.1% of basin
- 30.4 km²3.9% of basin
30 intersecting protected areas
Water fowl gathering area
5.62 km² overlap
Water fowl gathering area
4.33 km² overlap
Water fowl gathering area
3.76 km² overlap
Battures-de-Saint-Augustin-de-Desmaures Nature Reserve
IUCN Not ReportedRecognized nature reserve
3.75 km² overlap
Water fowl gathering area
3.46 km² overlap
Water fowl gathering area
3.43 km² overlap
Water fowl gathering area
3.31 km² overlap
Water fowl gathering area
2.50 km² overlap
Water fowl gathering area
2.50 km² overlap
21 more protected areassorted by overlap area
Water fowl gathering area
2.25 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
2.17 km² overlap
Water fowl gathering area
2.02 km² overlap
Water fowl gathering area
1.92 km² overlap
Water fowl gathering area
1.74 km² overlap
Water fowl gathering area
1.39 km² overlap
Water fowl gathering area
1.39 km² overlap
Water fowl gathering area
1.18 km² overlap
Recognized nature reserve
1.07 km² overlap
Water fowl gathering area
1.02 km² overlap
Water fowl gathering area
0.94 km² overlap
Water fowl gathering area
0.85 km² overlap
Water fowl gathering area
0.77 km² overlap
Capteuse-de-Rêves Natural reserve
IUCN Not ReportedRecognized nature reserve
0.53 km² overlap
Water fowl gathering area
0.39 km² overlap
mont Bélair (parties Vigneault / Rousseau / Falardeau) Natural Area Under Private Stewardship
IUCN IIINatural Area Under Private Stewardship
0.26 km² overlap
Station-Agronomique-de-l'Université-Laval Nature Reserve
IUCN Not ReportedRecognized nature reserve
0.14 km² overlap
Natural Area Under Private Stewardship
0.14 km² overlap
Natural Area Under Private Stewardship
0.13 km² overlap
Anse-Ross Nature Reserve
IUCN IIIRecognized nature reserve
0.12 km² overlap
Natural Area Under Private Stewardship
0.10 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 704 distinct species · 1 417 034 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 : 20 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 73 interactions GloBI sur 3 types (connectance 15.7%, filtre Serrano α=0.2). 11 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°
4,5°C
Annual rain
1 105mm
Moisture idx (CMI)
0,31
Runoff
815mm/an
PET
766mm
AET
660mm
Mean slope
1,4°
Water table
40cm
Forest
44%
Crops
24%
Urban
11%
Protected
7%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)