HydroBASINS lev08 watershed · #7080542010
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 2 administrative regions : Cass, Schuyler
Sub-basin area
80,3km²
Upstream area
61 118,7km²
Discharge
702,28m³/s
Mean elev.
136m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Illinois River1161 km²
- Bassin de Sangamon River884 km²
2 dept-equivalent regions (GADM L2)
- 52.4 km²65.2% of basin
- 28.0 km²34.8% of basin
4 intersecting protected areas
Beardstown Marsh
IUCN VConservation Area
1.85 km² overlap
Land And Water Reserve
0.16 km² overlap
Land And Water Reserve
0.08 km² overlap
Conservation Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
733 distinct species · 5 713 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 : 31 espèces reliées par 131 interactions GloBI sur 4 types (connectance 16.0%, filtre Serrano α=0.2). 10 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°
11,3°C
Annual rain
955mm
Moisture idx (CMI)
-0,13
Runoff
286mm/an
PET
1 103mm
AET
806mm
Mean slope
0,3°
Water table
26cm
Forest
1%
Crops
55%
Urban
6%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)