HydroBASINS lev08 watershed · #7080405180
Bassin de North Branch South Nation River
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 : Leeds and Grenville, Ottawa, Prescott and Russell, Stormont, Dundas and Glengarry
Sub-basin area
981km²
Upstream area
981,1km²
Discharge
13,55m³/s
Mean elev.
81m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 382.7 km²38.9% of basin
- 289.7 km²29.5% of basin
- 213.9 km²21.8% of basin
- 96.9 km²9.9% of basin
12 intersecting protected areas
Winchester Swamp
IUCN IVConservation Area
1.74 km² overlap
Lester Wetland
IUCN IVValued Natural Habitat
0.94 km² overlap
Hallville Forest
IUCN IVConservation Area
0.69 km² overlap
Osgoode Wetland Complex
IUCN IVConservation Area
0.47 km² overlap
Leitrim Wetland
IUCN IVConservation Area
0.44 km² overlap
Conservation Area
0.40 km² overlap
Snake Island Forest
IUCN IVConservation Area
0.39 km² overlap
Conservation Area
0.37 km² overlap
Reveler Conservation Area
IUCN IVConservation Area
0.35 km² overlap
3 more protected areassorted by overlap area
Conservation Area
0.07 km² overlap
Capital Recreation Area
IUCN Not ApplicableOECM
0.00 km² overlap
Morewood Bog
IUCN IVConservation Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 505 distinct species · 234 638 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 North Branch South Nation River : 20 espèces reliées par 60 interactions GloBI sur 3 types (connectance 13.8%, filtre Serrano α=0.2). 10 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°
6,1°C
Annual rain
885mm
Moisture idx (CMI)
0,08
Runoff
436mm/an
PET
814mm
AET
623mm
Mean slope
0,4°
Water table
22cm
Forest
34%
Crops
45%
Urban
2%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)