HydroBASINS lev08 watershed · #7080419560
Bassin de Severn 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 : Kawartha Lakes, Lake Hurron, Muskoka, Simcoe
Sub-basin area
832,1km²
Upstream area
6 039,2km²
Discharge
56,92m³/s
Mean elev.
238m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Black River1505 km²
- Bassin de Trent-Severn Waterway187 km²
4 dept-equivalent regions (GADM L2)
- 616.2 km²73.9% of basin
- 201.5 km²24.2% of basin
- 10.6 km²1.3% of basin
- 5.7 km²0.7% of basin
17 intersecting protected areas
Conservation Reserve
39.59 km² overlap
Conservation Reserve
27.16 km² overlap
Conservation Reserve
21.44 km² overlap
Conservation Reserve
7.98 km² overlap
Conservation Reserve
7.83 km² overlap
Conservation Reserve
3.67 km² overlap
Provincial Park
3.53 km² overlap
Carr's Lake
IUCN IVNGO/Land Trust/Agency - Fee Simple Property
2.26 km² overlap
Provincial Park
2.20 km² overlap
8 more protected areassorted by overlap area
Provincial Park
1.91 km² overlap
Conservation Reserve
0.82 km² overlap
Conservation Reserve
0.76 km² overlap
Adams Nature Reserve
IUCN IaNGO/Land Trust/Agency - Fee Simple Property
0.43 km² overlap
Roehl Wetland Nature Reserve
IUCN IaNGO/Land Trust/Agency - Fee Simple Property
0.29 km² overlap
NGO/Land Trust/Agency - Fee Simple Property
0.28 km² overlap
NGO/Land Trust/Agency - Fee Simple Property
0.22 km² overlap
NGO/Land Trust/Agency - Fee Simple Property
0.13 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 198 distinct species · 165 026 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Severn River : 27 espèces reliées par 78 interactions GloBI sur 3 types (connectance 11.7%, 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°
5,6°C
Annual rain
964mm
Moisture idx (CMI)
0,13
Runoff
265mm/an
PET
842mm
AET
634mm
Mean slope
1,3°
Water table
68cm
Forest
88%
Crops
2%
Urban
0%
Protected
14%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)