HydroBASINS lev08 watershed · #7080454430
Bassin de Welland 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 3 administrative regions across 2 countries : Lake Ontario, Niagara
Sub-basin area
530,4km²
Upstream area
1 265,6km²
Discharge
6,31m³/s
Mean elev.
133m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Bridgewater Creek150 km²
- Bassin de Mill Race Creek136 km²
3 dept-equivalent regions (GADM L2)
- 340.3 km²64.0% of basin
- 175.6 km²33.0% of basin
- Lake OntarioNew York · United States15.5 km²2.9% of basin
3 intersecting protected areas
Conservation Area
6.74 km² overlap
Conservation Reserve
2.30 km² overlap
Mud Lake
IUCN VConservation Area
0.63 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 238 distinct species · 341 657 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 Welland River : 28 espèces reliées par 70 interactions GloBI sur 3 types (connectance 11.1%, filtre Serrano α=0.2). 8 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°
8,5°C
Annual rain
872mm
Moisture idx (CMI)
0,01
Runoff
259mm/an
PET
860mm
AET
645mm
Mean slope
0,4°
Water table
36cm
Forest
1%
Crops
31%
Urban
18%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)