HydroBASINS lev08 watershed · #7080497170
Bassin de Portage 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 6 administrative regions : Hancock, Lake Erie, Ottawa, Sandusky, Seneca +1
Sub-basin area
1 700,3km²
Upstream area
1 700,3km²
Discharge
12,19m³/s
Mean elev.
206m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
6 dept-equivalent regions (GADM L2)
- 758.2 km²44.5% of basin
- Hancock323.8 km²19.0% of basin
- 222.1 km²13.0% of basin
- Ottawa211.2 km²12.4% of basin
- 166.9 km²9.8% of basin
- Seneca20.4 km²1.2% of basin
23 intersecting protected areas
Ottawa
IUCN IVNational Wildlife Refuge
3.03 km² overlap
Little Portage
IUCN VWildlife Area
1.45 km² overlap
Marine Protected Area
1.14 km² overlap
Sponsler Property Acquisition - Cricket Frog Cove
IUCN Not AssignedConservation Area
0.63 km² overlap
Fox's Marsh
IUCN VWildlife Area
0.54 km² overlap
Bradner
IUCN VPreserve
0.50 km² overlap
Sweeney and Krause Marsh
IUCN VConservation Area
0.50 km² overlap
North Bass Island
IUCN VEnvironmental System
0.40 km² overlap
Reserve Program
0.28 km² overlap
14 more protected areassorted by overlap area
Wintergarden/St. John's
IUCN VNature Preserve
0.25 km² overlap
Rudolph-Savanna
IUCN VPreserve
0.21 km² overlap
White Star Addition III
IUCN Not AssignedConservation Area
0.17 km² overlap
Aldrich Pond
IUCN VWildlife Area
0.16 km² overlap
Watershed Protection
0.13 km² overlap
Watershed Protection
0.12 km² overlap
Reserve Program
0.11 km² overlap
Arboretum
0.08 km² overlap
Green Island
IUCN VWildlife Area
0.06 km² overlap
Oak Harbor Conservation
IUCN VClub
0.05 km² overlap
Reserve Program
0.01 km² overlap
Ladd-Carr
IUCN VNature Preserve
0.01 km² overlap
LaPlante
IUCN VNature Preserve
0.01 km² overlap
Prokesh
IUCN VNature Preserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 286 distinct species · 313 477 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Portage River : 24 espèces reliées par 70 interactions GloBI sur 3 types (connectance 12.5%, 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°
9,8°C
Annual rain
863mm
Moisture idx (CMI)
-0,13
Runoff
230mm/an
PET
989mm
AET
726mm
Mean slope
0,2°
Water table
10cm
Forest
3%
Crops
75%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)