HydroBASINS lev08 watershed · #7080508470
Bassin de Illinois 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 : Bureau, La Salle, Lee, Putnam
Sub-basin area
831,4km²
Upstream area
31 529,6km²
Discharge
382,93m³/s
Mean elev.
204m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Vermilion River755 km²
- Bassin de Illinois River447 km²
4 dept-equivalent regions (GADM L2)
- 535.9 km²64.4% of basin
- 174.8 km²21.0% of basin
- Putnam109.2 km²13.1% of basin
- Lee12.7 km²1.5% of basin
11 intersecting protected areas
Wildlife Area
7.52 km² overlap
Reserve Program
1.13 km² overlap
Maze Woods
IUCN VLand And Water Reserve
0.98 km² overlap
Reserve
0.97 km² overlap
Putnam County
IUCN VConservation Area
0.90 km² overlap
Mitchell's Grove
IUCN VState Natural Area
0.75 km² overlap
Mitchell's Grove
IUCN VNature Preserve
0.73 km² overlap
Donnelley State Fish and
IUCN VWildlife Area
0.72 km² overlap
Starved Rock Nature
IUCN VNature Preserve
0.03 km² overlap
2 more protected areassorted by overlap area
Starved Rock
IUCN VNature Preserve
0.02 km² overlap
Nature Preserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 506 distinct species · 216 075 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 Illinois River : 28 espèces reliées par 73 interactions GloBI sur 3 types (connectance 11.6%, 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°
9,4°C
Annual rain
918mm
Moisture idx (CMI)
-0,10
Runoff
345mm/an
PET
1 026mm
AET
774mm
Mean slope
0,7°
Water table
51cm
Forest
6%
Crops
71%
Urban
3%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)