HydroBASINS lev08 watershed · #7080407260
Bassin de Rivière La Guerre
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 : Le Haut-Saint-Laurent, Stormont, Dundas and Glengarry, Vaudreuil-Soulanges
Sub-basin area
213,6km²
Upstream area
781 341,7km²
Discharge
8 050,78m³/s
Mean elev.
50m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
3 dept-equivalent regions (GADM L2)
- 120.7 km²56.4% of basin
- 26.8 km²12.5% of basin
- 2.6 km²1.2% of basin
14 intersecting protected areas
Water fowl gathering area
7.79 km² overlap
Water fowl gathering area
6.35 km² overlap
Water fowl gathering area
6.05 km² overlap
Natural Area Under Private Stewardship
2.35 km² overlap
Water fowl gathering area
2.12 km² overlap
Natural Area Under Private Stewardship
1.57 km² overlap
Natural Area Under Private Stewardship
1.49 km² overlap
Recognized nature reserve
0.85 km² overlap
Natural Area Under Private Stewardship
0.83 km² overlap
5 more protected areassorted by overlap area
Coteau-de-la-Rivière-la-Guerre (partie Placement LS Piché Inc) Natural Area Under Private Stewardship
IUCN Not ReportedNatural Area Under Private Stewardship
0.81 km² overlap
Natural Area Under Private Stewardship
0.74 km² overlap
Natural Area Under Private Stewardship
0.46 km² overlap
Natural Area Under Private Stewardship
0.06 km² overlap
Natural Area Under Private Stewardship
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 110 distinct species · 78 732 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 36 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 La Guerre : 24 espèces reliées par 87 interactions GloBI sur 4 types (connectance 13.8%, 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°
6,4°C
Annual rain
921mm
Moisture idx (CMI)
0,07
Runoff
539mm/an
PET
860mm
AET
650mm
Mean slope
0,4°
Water table
33cm
Forest
49%
Crops
59%
Urban
0%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)