HydroBASINS lev08 watershed · #7080524080
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 8 administrative regions : Bureau, La Salle, Marshall, Peoria, Putnam +3
Sub-basin area
2 438km²
Upstream area
35 262,2km²
Discharge
420,59m³/s
Mean elev.
198m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Big Bureau Creek1295 km²
- Bassin de Illinois River831 km²
8 dept-equivalent regions (GADM L2)
- Marshall995.2 km²40.8% of basin
- 506.6 km²20.8% of basin
- Putnam332.3 km²13.6% of basin
- 253.2 km²10.4% of basin
- 164.8 km²6.8% of basin
- 128.5 km²5.3% of basin
- 54.8 km²2.2% of basin
- 5.8 km²0.2% of basin
30 intersecting protected areas
Marshall State Fish and
IUCN VWildlife Area
26.02 km² overlap
Chautauqua
IUCN IVNational Wildlife Refuge
7.49 km² overlap
Senachwine Lake Fee
IUCN VLake
4.52 km² overlap
Audobon
IUCN VWildlife Area
4.22 km² overlap
Woodford State Fish and
IUCN VWildlife Area
2.97 km² overlap
Detweiller Woods
IUCN VNature Preserve
2.60 km² overlap
Miller-Anderson Woods
IUCN VState Natural Area
2.05 km² overlap
Forest Park
IUCN VNature Preserve
1.58 km² overlap
Donnelley State Fish and
IUCN VWildlife Area
1.55 km² overlap
21 more protected areassorted by overlap area
Robinson Park - South
IUCN VPark
1.42 km² overlap
Robinson
IUCN VPark
1.39 km² overlap
Spring Creek
IUCN VPreserve
1.37 km² overlap
Banks/Young
IUCN VWildlife Preserve
0.91 km² overlap
Crow Creek Bluff
IUCN VForest
0.83 km² overlap
Clear Creek
IUCN VForest
0.80 km² overlap
Frazer Woods
IUCN VForest Reserve
0.78 km² overlap
Forest Park South
IUCN VNature Preserve
0.72 km² overlap
Conservation Area
0.69 km² overlap
Messerling
IUCN VWildlife Preserve
0.68 km² overlap
Reserve
0.63 km² overlap
Blackmon
IUCN VWildlife Preserve
0.53 km² overlap
Merdel/Ford Property
IUCN VForest Reserve
0.47 km² overlap
Reserve Program
0.34 km² overlap
Sanctuary
0.33 km² overlap
Altofer Tract
IUCN VForest Reserve
0.33 km² overlap
State Natural Area
0.33 km² overlap
Conservation Area
0.31 km² overlap
County Line Hill Prairie
IUCN VConservation Area
0.29 km² overlap
Riverfront
IUCN VNature Preserve
0.28 km² overlap
Magnolia Hill Prairies
IUCN VConservation Area
0.28 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 477 distinct species · 545 592 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 65 interactions GloBI sur 3 types (connectance 10.9%, filtre Serrano α=0.2). 7 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°
10,1°C
Annual rain
926mm
Moisture idx (CMI)
-0,13
Runoff
326mm/an
PET
1 061mm
AET
781mm
Mean slope
1,0°
Water table
83cm
Forest
13%
Crops
73%
Urban
2%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)