HydroBASINS lev08 watershed · #7080507040
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 3 administrative regions : Grundy, Kendall, La Salle
Sub-basin area
797,8km²
Upstream area
20 090,8km²
Discharge
248,24m³/s
Mean elev.
190m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Gooseberry Creek1305 km²
- Bassin de Illinois River44 km²
3 dept-equivalent regions (GADM L2)
- 417.1 km²52.2% of basin
- 351.9 km²44.1% of basin
- 29.9 km²3.7% of basin
6 intersecting protected areas
Wildlife Area
8.33 km² overlap
Wildlife Area
0.13 km² overlap
Seneca Hill Prairie
IUCN VNatural Area
0.04 km² overlap
Natural Area
0.03 km² overlap
Wildlife Area
0.02 km² overlap
Third Avenue Priarie
IUCN VNatural Area
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 285 distinct species · 38 646 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 : 32 espèces reliées par 84 interactions GloBI sur 3 types (connectance 10.2%, filtre Serrano α=0.2). 9 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
918mm
Moisture idx (CMI)
-0,11
Runoff
384mm/an
PET
1 028mm
AET
774mm
Mean slope
0,5°
Water table
45cm
Forest
8%
Crops
71%
Urban
3%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)