HydroBASINS lev08 watershed · #7080579830
Bassin de Mississippi 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 5 administrative regions : Madison, Monroe, Saint Charles, Saint Clair, Saint Louis
Sub-basin area
1 355,6km²
Upstream area
1 774 449km²
Discharge
6 468,83m³/s
Mean elev.
151m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Cahokia Creek1629 km²
- Bassin de Missouri River1480 km²
5 dept-equivalent regions (GADM L2)
- Saint Louis534.2 km²39.4% of basin
- Saint Clair411.7 km²30.3% of basin
- Madison296.6 km²21.9% of basin
- Monroe114.1 km²8.4% of basin
- Saint Charles0.0 km²0.0% of basin
30 intersecting protected areas
Columbia Bottom Ca
IUCN VState Conservation Area
8.62 km² overlap
Wildlife Area
8.57 km² overlap
Falling Spring
IUCN VConservation Area
3.22 km² overlap
Stemler Cave Woods
IUCN VState Natural Area
1.56 km² overlap
Watershed Protection
1.45 km² overlap
Levee
IUCN VLake
0.94 km² overlap
Emergency Wetlands Reserve Program (EWetlands Reserve Program (WRP)), St. Clair, IL
IUCN Not AssignedReserve Program
0.83 km² overlap
Bellefontaine Ca
IUCN IIILocal Park
0.58 km² overlap
Bellefontaine
IUCN VConservation Area
0.58 km² overlap
21 more protected areassorted by overlap area
Reserve Program
0.44 km² overlap
Eagle Park Marsh
IUCN VPark
0.43 km² overlap
Gateway Arch
IUCN IINational Park
0.35 km² overlap
Arlington
IUCN VWetlands
0.34 km² overlap
Land And Water Reserve
0.28 km² overlap
Fairmont City Site
IUCN VConservation Area
0.14 km² overlap
Local Conservation Area
0.12 km² overlap
Tecklenberg Woods
IUCN VNature Preserve
0.12 km² overlap
Alorton H
IUCN VNatural Area
0.11 km² overlap
Bird
IUCN VSanctuary
0.09 km² overlap
Gravois Creek
IUCN VConservation Area
0.06 km² overlap
Claire Gempp Davidson Memorial
IUCN IIIConservation Area
0.05 km² overlap
Wildlife Area
0.05 km² overlap
Access
0.05 km² overlap
Touchette Hospital
IUCN VOpen Space
0.05 km² overlap
Wild Cherry Ridge
IUCN VConservation Area
0.04 km² overlap
Local Conservation Area
0.02 km² overlap
Pruitt Sinkholes
IUCN VNature Preserve
0.01 km² overlap
Shady Creek
IUCN VNature Sanctuary
0.01 km² overlap
Alorton Thicket
IUCN VConservation Area
0.01 km² overlap
Dupo Prairie
IUCN VConservation Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
8 808 distinct species · 1 662 064 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 Mississippi River : 28 espèces reliées par 82 interactions GloBI sur 3 types (connectance 11.7%, 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°
13,0°C
Annual rain
966mm
Moisture idx (CMI)
-0,16
Runoff
240mm/an
PET
1 151mm
AET
816mm
Mean slope
1,2°
Water table
96cm
Forest
10%
Crops
25%
Urban
56%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)