HydroBASINS lev08 watershed · #7080367750
Bassin de Little 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 6 administrative regions : Billings, Bowman, Fallon, Golden Valley, Slope +1
Sub-basin area
1 436,9km²
Upstream area
13 315,9km²
Discharge
23,84m³/s
Mean elev.
873m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Little Beaver Creek1544 km²
- Bassin de Little Missouri River933 km²
6 dept-equivalent regions (GADM L2)
- 955.8 km²66.3% of basin
- Golden Valley244.7 km²17.0% of basin
- 190.4 km²13.2% of basin
- 37.0 km²2.6% of basin
- 10.8 km²0.7% of basin
- 2.0 km²0.1% of basin
2 intersecting protected areas
Limber Pine
IUCN IaResearch Natural Area
2.76 km² overlap
Speck Davis
IUCN VPond
0.65 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
544 distinct species · 5 416 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 Little Missouri River : 23 espèces reliées par 81 interactions GloBI sur 4 types (connectance 15.3%, 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°
5,7°C
Annual rain
368mm
Moisture idx (CMI)
-0,62
Runoff
56mm/an
PET
975mm
AET
322mm
Mean slope
2,5°
Water table
455cm
Forest
0%
Crops
22%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)