HydroBASINS lev08 watershed · #7080507790
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 1 administrative regions : La Salle
Sub-basin area
447,2km²
Upstream area
27 223,3km²
Discharge
331,96m³/s
Mean elev.
189m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Illinois River798 km²
- Bassin de Fox River199 km²
1 dept-equivalent regions (GADM L2)
- 447.8 km²100.0% of basin
11 intersecting protected areas
Starved Rock Nature
IUCN VNature Preserve
12.86 km² overlap
Starved Rock
IUCN VNature Preserve
1.97 km² overlap
State Natural Area
0.84 km² overlap
Nature Preserve
0.82 km² overlap
Nature Preserve
0.42 km² overlap
Nature Preserve
0.30 km² overlap
Plum Island Eagle
IUCN VSanctuary
0.24 km² overlap
Clark Run
IUCN VNatural Area
0.22 km² overlap
Erant's Marsh
IUCN VNatural Area
0.06 km² overlap
2 more protected areassorted by overlap area
Catlin Salt Marsh
IUCN VNatural Area
0.04 km² overlap
Nature Preserve
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 510 distinct species · 108 054 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 : 35 espèces reliées par 80 interactions GloBI sur 4 types (connectance 9.3%, 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°
9,6°C
Annual rain
920mm
Moisture idx (CMI)
-0,10
Runoff
370mm/an
PET
1 022mm
AET
776mm
Mean slope
0,6°
Water table
64cm
Forest
5%
Crops
69%
Urban
3%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)