HydroBASINS lev08 watershed · #7080349330
Bassin de Missouri 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 : McLean, Mercer
Sub-basin area
459km²
Upstream area
463 092,5km²
Discharge
804,5m³/s
Mean elev.
572m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Missouri River784 km²
- Bassin de Missouri River7 km²
2 dept-equivalent regions (GADM L2)
- McLean352.7 km²76.6% of basin
- Mercer107.6 km²23.4% of basin
4 intersecting protected areas
Wolf Creek-mallard
IUCN VWildlife Management Area
13.40 km² overlap
Riverdale
IUCN VState Wildlife Management Area
11.24 km² overlap
Garrison Dam
IUCN VNational Fish Hatchery
0.81 km² overlap
Reserve Program
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
622 distinct species · 31 946 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 Missouri River : 25 espèces reliées par 83 interactions GloBI sur 4 types (connectance 14.8%, 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°
4,9°C
Annual rain
420mm
Moisture idx (CMI)
-0,53
Runoff
71mm/an
PET
904mm
AET
367mm
Mean slope
1,3°
Water table
133cm
Forest
7%
Crops
63%
Urban
0%
Protected
6%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)