HydroBASINS lev08 watershed · #7080349980
Bassin de Two Island 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 : Ashland, Bayfield, Cook, Lake, Lake Superior
Sub-basin area
1 069,8km²
Upstream area
20 638,9km²
Discharge
270,89m³/s
Mean elev.
198m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Manitou River762 km²
- Bassin de Sand River553 km²
6 dept-equivalent regions (GADM L2)
- Lake Superior589.5 km²55.0% of basin
- Lake Superior334.6 km²31.2% of basin
- Cook58.3 km²5.4% of basin
- 54.0 km²5.0% of basin
- Ashland32.3 km²3.0% of basin
- Lake4.0 km²0.4% of basin
4 intersecting protected areas
Marine Protected Area
59.75 km² overlap
Gaylord Nelson
IUCN IbWilderness Area
30.21 km² overlap
Frog Bay
IUCN Not AssignedEasement
0.33 km² overlap
Aquatic Management Area
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 699 distinct species · 46 541 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Two Island River : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 87 interactions GloBI sur 4 types (connectance 10.6%, filtre Serrano α=0.2). 13 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°
4,6°C
Annual rain
758mm
Moisture idx (CMI)
-0,05
Runoff
666mm/an
PET
797mm
AET
622mm
Mean slope
0,5°
Water table
17cm
Forest
10%
Crops
2%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)