HydroBASINS lev08 watershed · #7080648820
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 7 administrative regions : Adair, Benton, Cherokee, Crawford, Delaware +2
Sub-basin area
4 263,5km²
Upstream area
4 263,5km²
Discharge
37,76m³/s
Mean elev.
339m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
7 dept-equivalent regions (GADM L2)
- WashingtonArkansas · United States1169.9 km²27.4% of basin
- AdairOklahoma · United States1034.5 km²24.3% of basin
- CherokeeOklahoma · United States904.8 km²21.2% of basin
- BentonArkansas · United States763.3 km²17.9% of basin
- DelawareOklahoma · United States203.7 km²4.8% of basin
- SequoyahOklahoma · United States184.3 km²4.3% of basin
- CrawfordArkansas · United States3.7 km²0.1% of basin
22 intersecting protected areas
Cookson Hills Fee
IUCN VPrivate Conservation Land
61.65 km² overlap
Cookson
IUCN VWildlife Management Area
30.02 km² overlap
State Wildlife Management Area
15.48 km² overlap
Tenkiller
IUCN VWildlife Management Area
10.16 km² overlap
McClellan Kerr
IUCN VWildlife Management Area
3.86 km² overlap
Nickel 12
IUCN VPrivate Conservation Land
2.72 km² overlap
Nickel 11
IUCN VPrivate Conservation Land
2.47 km² overlap
Sparrowhawk
IUCN VWildlife Management Area
2.12 km² overlap
Reserve Program
1.94 km² overlap
13 more protected areassorted by overlap area
Cookson Hills
IUCN VPrivate Conservation Land
1.73 km² overlap
Ozark Plateau
IUCN IVNational Wildlife Refuge
1.07 km² overlap
Logan Cave
IUCN IVNational Wildlife Refuge
0.51 km² overlap
Moorman
IUCN Not AssignedWildlife Sanctuary
0.38 km² overlap
Chensey Prairie
IUCN VNatural Area
0.23 km² overlap
Reserve Program
0.21 km² overlap
Environmental System
0.13 km² overlap
Reserve Program
0.13 km² overlap
Cave Springs Cave
IUCN VNatural Area
0.06 km² overlap
Brooks-Hummel
IUCN VNature Preserve
0.05 km² overlap
Madison
IUCN VNatural Area
0.05 km² overlap
Cave Springs 3 (Brandon)
IUCN VEnvironmental System
0.04 km² overlap
Searles Prairie
IUCN VNatural Area
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 590 distinct species · 656 047 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 : 24 espèces reliées par 69 interactions GloBI sur 4 types (connectance 12.3%, 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°
14,7°C
Annual rain
1 156mm
Moisture idx (CMI)
-0,08
Runoff
285mm/an
PET
1 264mm
AET
971mm
Mean slope
3,0°
Water table
233cm
Forest
55%
Crops
30%
Urban
7%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)