HydroBASINS lev08 watershed · #7080034570
Bassin de Rivière du Sud
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 4 administrative regions : Bellechasse, L'Islet, Les Etchemins, Montmagny
Sub-basin area
1 994,6km²
Upstream area
1 994,6km²
Discharge
46,69m³/s
Mean elev.
320m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 960.3 km²48.0% of basin
- 755.4 km²37.8% of basin
- 272.7 km²13.6% of basin
- 11.5 km²0.6% of basin
17 intersecting protected areas
Ecological reserve
5.32 km² overlap
03551R015 Biological Refuge
IUCN IVBiological refuge
2.05 km² overlap
Old-growth forest
1.49 km² overlap
03551R007 Biological Refuge
IUCN IVBiological refuge
1.19 km² overlap
03551R017 Biological Refuge
IUCN IVBiological refuge
0.65 km² overlap
03551R014 Biological Refuge
IUCN IVBiological refuge
0.62 km² overlap
03551R010 Biological Refuge
IUCN IVBiological refuge
0.55 km² overlap
03551R011 Biological Refuge
IUCN IVBiological refuge
0.52 km² overlap
Old-growth forest
0.51 km² overlap
8 more protected areassorted by overlap area
03551R013 Biological Refuge
IUCN IVBiological refuge
0.50 km² overlap
03551R012 Biological Refuge
IUCN IVBiological refuge
0.45 km² overlap
Old-growth forest
0.17 km² overlap
03551R014X Biological Refuge
IUCN IVBiological refuge
0.07 km² overlap
03551R012X Biological Refuge
IUCN IVBiological refuge
0.06 km² overlap
Land reserved for protected area
0.02 km² overlap
03551R018 Biological Refuge
IUCN IVBiological refuge
0.02 km² overlap
Water fowl gathering area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 582 distinct species · 297 889 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 du Sud : 19 espèces reliées par 69 interactions GloBI sur 3 types (connectance 15.9%, 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°
3,4°C
Annual rain
1 054mm
Moisture idx (CMI)
0,32
Runoff
735mm/an
PET
719mm
AET
628mm
Mean slope
3,0°
Water table
68cm
Forest
88%
Crops
13%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)