HydroBASINS lev08 watershed · #7080034530
Bassin de Rivière Boyer
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 : Bellechasse, Desjardins, L'Islet, L'Île-d'Orléans, Montmagny
Sub-basin area
449,9km²
Upstream area
449,9km²
Discharge
2,96m³/s
Mean elev.
60m
Administrative coverage
5 dept-equivalent regions (GADM L2)
- 243.9 km²54.1% of basin
- 80.8 km²17.9% of basin
- 79.4 km²17.6% of basin
- 3.4 km²0.8% of basin
- 0.4 km²0.1% of basin
30 intersecting protected areas
Land reserved for protected area
31.78 km² overlap
Water fowl gathering area
2.87 km² overlap
Water fowl gathering area
2.11 km² overlap
Water fowl gathering area
1.89 km² overlap
Water fowl gathering area
1.88 km² overlap
Grosse Île and the Irish Memorial National Historic Site
IUCN Not ApplicableNational Historic Site
1.81 km² overlap
Water fowl gathering area
1.58 km² overlap
Water fowl gathering area
1.47 km² overlap
Water fowl gathering area
1.27 km² overlap
21 more protected areassorted by overlap area
Water fowl gathering area
1.21 km² overlap
Water fowl gathering area
1.20 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
1.19 km² overlap
Saint-Vallier Bird Sanctuary
IUCN IIIMigratory Bird Sanctuary
1.15 km² overlap
Water fowl gathering area
1.11 km² overlap
Water fowl gathering area
1.04 km² overlap
Water fowl gathering area
1.01 km² overlap
Water fowl gathering area
0.98 km² overlap
Water fowl gathering area
0.95 km² overlap
Water fowl gathering area
0.95 km² overlap
Water fowl gathering area
0.94 km² overlap
Water fowl gathering area
0.92 km² overlap
Water fowl gathering area
0.90 km² overlap
Water fowl gathering area
0.90 km² overlap
Water fowl gathering area
0.88 km² overlap
Water fowl gathering area
0.83 km² overlap
Water fowl gathering area
0.79 km² overlap
Water fowl gathering area
0.76 km² overlap
Water fowl gathering area
0.70 km² overlap
Water fowl gathering area
0.67 km² overlap
Water fowl gathering area
0.67 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 655 distinct species · 195 367 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Rivière Boyer : 15 espèces reliées par 73 interactions GloBI sur 3 types (connectance 19.3%, 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°
4,6°C
Annual rain
1 049mm
Moisture idx (CMI)
0,27
Runoff
788mm/an
PET
762mm
AET
646mm
Mean slope
1,3°
Water table
40cm
Forest
34%
Crops
47%
Urban
4%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)