HydroBASINS lev08 watershed · #7080421410
Bassin de Saint Lawrence 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 5 administrative regions across 2 countries : Jefferson, Lake Ontario, Leeds and Grenville, Saint Lawrence
Sub-basin area
1 023,6km²
Upstream area
766 396,9km²
Discharge
7 750,87m³/s
Mean elev.
96m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Gananoque River1126 km²
- Bassin de French Creek127 km²
5 dept-equivalent regions (GADM L2)
- 475.5 km²46.4% of basin
- Saint LawrenceNew York · United States205.2 km²20.0% of basin
- JeffersonNew York · United States178.1 km²17.4% of basin
- Lake OntarioNew York · United States102.1 km²9.9% of basin
- 64.9 km²6.3% of basin
30 intersecting protected areas
National Park
17.16 km² overlap
Mac Johnson Wildlife Area
IUCN IVConservation Area
5.36 km² overlap
Provincial Park
4.67 km² overlap
Reserve Program
2.44 km² overlap
Conservation Area
2.08 km² overlap
Conservation Area
0.84 km² overlap
Paddock Farm (Farrington, Crooked Creek)
IUCN Not AssignedConservation Easement
0.28 km² overlap
Us-Ny-165-3
IUCN Not AssignedConservation Easement
0.28 km² overlap
A Country Mile-Howard/Price
IUCN Not AssignedConservation Easement
0.27 km² overlap
21 more protected areassorted by overlap area
Collins Landing
IUCN VWildlife Management Area
0.21 km² overlap
Ettinger
IUCN Not AssignedWetlands
0.12 km² overlap
Lyn Valley Conservation Area
IUCN IVConservation Area
0.11 km² overlap
Ironsides Island
IUCN VPreserve
0.08 km² overlap
Chippewa Point
IUCN Not AssignedConservation Easement
0.07 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.07 km² overlap
Cranberry Creek
IUCN VWildlife Management Area
0.05 km² overlap
Oak Island Lots A & B
IUCN Not AssignedConservation Easement
0.03 km² overlap
Oak Island Lot K
IUCN Not AssignedConservation Easement
0.02 km² overlap
Oak Island Lot J
IUCN Not AssignedConservation Easement
0.02 km² overlap
Oak Island Lot F
IUCN Not AssignedConservation Easement
0.02 km² overlap
Oak Island Lot C
IUCN Not AssignedConservation Easement
0.02 km² overlap
Oak Island Lot I
IUCN Not AssignedConservation Easement
0.02 km² overlap
Oak Island Lot D
IUCN Not AssignedConservation Easement
0.02 km² overlap
Local Conservation Area
0.02 km² overlap
Reserve Program
0.01 km² overlap
Raymer-Alasimi (18863 Rock Bai Rd)
IUCN Not AssignedConservation Easement
0.01 km² overlap
Us-Ny-165-6
IUCN Not AssignedConservation Easement
0.01 km² overlap
Doctor Island
IUCN IaNGO/Land Trust/Agency - Fee Simple Property
0.00 km² overlap
Indian Pt. - .5A
IUCN Not AssignedConservation Easement
0.00 km² overlap
Cobb Island
IUCN Not AssignedConservation Easement
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 634 distinct species · 279 208 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Saint Lawrence River : 23 espèces reliées par 87 interactions GloBI sur 3 types (connectance 15.5%, 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°
6,7°C
Annual rain
913mm
Moisture idx (CMI)
0,07
Runoff
474mm/an
PET
846mm
AET
640mm
Mean slope
1,1°
Water table
80cm
Forest
64%
Crops
21%
Urban
2%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)